UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

(Rule 14a-101)

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No.    )

Filed by the Registrant  ☒

Filed by a Party other than the Registrant  ☐

Check the appropriate box:

Mesa Air Group, Inc.

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

NOTICE OF ANNUAL MEETING OF SHAREHOLDERS

and

2023 Proxy Statement

The Annual Meeting of the Shareholders of Mesa Air Group, Inc. will be held:

Thursday, February 23, 2023 at 2 p.m. Mountain Standard Time

Phoenix Airport Marriott

1101 N. 44^th Street

Phoenix, Arizona 85008

410 North 44th Street, Suite 700

Phoenix, Arizona 85008

January 11, 2023

Dear Fellow Shareholder:

You are cordially invited to attend the 2023 Annual Meeting of Shareholders for the fiscal year ended September 30, 2022 (the “Annual Meeting”) of Mesa Air Group, Inc. The meeting will be held on Thursday, February 23, 2023, at 2:00 p.m., Mountain Standard Time, at the Phoenix Airport Marriott, 1101 N. 44^th Street, Phoenix, Arizona 85008.

At the Annual Meeting, you will be asked to (i) elect seven directors to hold office until the next annual meeting and until their respective successors are duly elected and qualified, (ii) ratify the appointment of Ernst & Young LLP as our independent registered public accounting firm for the fiscal year ending September 30, 2023 and (iii) transact any other business that may properly come before the Annual Meeting, or any adjournments or postponements thereof.

It is important that your shares be represented and voted, whether or not you plan to attend the Annual Meeting in person. You may vote on the Internet, by telephone or by completing and mailing a proxy card. Voting over the Internet, by telephone or by written proxy will ensure your shares are represented at the Annual Meeting. If you attend the Annual Meeting, you may revoke your proxy if you wish, and vote in person.

We thank you for your continued support and interest in Mesa Air Group.

Sincerely yours,

Jonathan G. Ornstein

Chairman, Chief Executive Officer and Director

This proxy statement is dated January 11, 2023, and is first being made available to shareholders on or about January 15, 2023.

NOTICE OF THE 2023 ANNUAL MEETING OF SHAREHOLDERS

OF MESA AIR GROUP, INC.

By order of the Board of Directors,

Brian S. Gillman

Executive Vice President, General Counsel and Secretary

Phoenix, Arizona

January 11, 2023

IMPORTANT INFORMATION REGARDING THE AVAILABILITY OF PROXY MATERIALS

The Notice of Meeting, Proxy Statement, Proxy Card and our fiscal year 2022 Annual Report, which includes our Annual Report on Form 10-K for the fiscal year ended September 30, 2022, are available at www.proxyvote.com.

YOUR VOTE IS VERY IMPORTANT. PLEASE CAREFULLY READ THE ATTACHED PROXY STATEMENT. EVEN IF YOU PLAN TO ATTEND THE ANNUAL MEETING, PLEASE PROMPTLY COMPLETE, EXECUTE, DATE AND RETURN THE ENCLOSED PROXY CARD IN THE ACCOMPANYING POSTAGE-PAID ENVELOPE. NO POSTAGE IS NECESSARY IF MAILED IN THE UNITED STATES. YOU MAY ALSO VOTE ELECTRONICALLY VIA THE INTERNET OR BY TELEPHONE BY FOLLOWING THE INSTRUCTIONS ON THE PROXY CARD. IF YOU VOTE BY INTERNET OR TELEPHONE, THEN YOU NEED NOT RETURN A WRITTEN PROXY CARD BY MAIL. SHAREHOLDERS WHO ATTEND THE ANNUAL MEETING MAY REVOKE THEIR PROXIES AND VOTE IN PERSON IF THEY SO DESIRE. IN ACCORDANCE WITH OUR SECURITY PROCEDURES, ALL PERSONS ATTENDING THE ANNUAL MEETING WILL BE REQUIRED TO PRESENT PICTURE IDENTIFICATION.

TABLE OF CONTENTS

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410 North 44th Street, Suite 700

Phoenix, Arizona 85008

PROXY STATEMENT

FOR 2023 ANNUAL MEETING OF SHAREHOLDERS

To be held on Thursday, February 23, 2023

Questions and Answers

about Proxy Materials and Voting

This Proxy Statement, the accompanying Notice of Annual Meeting, proxy card and the Annual Report to Shareholders of Mesa Air Group, Inc. (the “Company,” “Mesa Air Group,” “we, “us” and “our”) are being mailed on or about January 15, 2023. You should read this entire Proxy Statement (this “Proxy Statement”) carefully for information about the proposals to be presented at our 2023 Annual Meeting of Shareholders for the fiscal year ended September 30, 2022 (our “Annual Meeting”). Information contained on, or that can be accessed through, our website is not a part of this Proxy Statement.

The information in the “question and answer” format below is for your convenience only and provides essential information about the proxy materials and how to cast your vote at our Annual Meeting.

What is a proxy?

Our Board of Directors (our “Board”) is asking for your proxy. This means you authorize persons selected by the Company to vote your shares at our Annual Meeting in the way that you instruct. All shares represented by valid proxies that are received and not revoked before our Annual Meeting will be voted at our Annual Meeting in accordance with the shareholder’s specific voting instructions.

Why am I receiving these materials?

You are receiving these materials because at the close of business on January 3, 2023 (the “Record Date”), you owned shares of our common stock, no par value per share. All shareholders of record on the Record Date are entitled to attend and vote at our Annual Meeting.

Each such share of our common stock is entitled to vote at our Annual Meeting. On the Record Date, we had 36,378,550 shares of common stock outstanding. With respect to all of the matters submitted for vote at our Annual Meeting, each share of common stock is entitled to one vote.

What information is contained in this Proxy Statement?

This Proxy Statement includes information about the nominees for directors and other matters to be voted on at our Annual Meeting. It also explains the voting process and requirements; describes the compensation of our principal executive officer, principal financial officer and our other most highly compensated executive officers (collectively referred to as our “named executive officers” or “NEOs”); describes the compensation of our directors; and provides certain other information that the U.S. Securities and Exchange Commission (the “SEC”) rules require.

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What should I do with these materials?

Please carefully read and consider the information contained in this Proxy Statement and then vote your shares as soon as possible to ensure that your shares will be represented at our Annual Meeting. You may vote your shares prior to our Annual Meeting even if you plan to attend our Annual Meeting in person.

What shares are included on my proxy card?

You will receive one proxy card for all the shares of our common stock that you hold as a shareholder of record (in certificate form or in book-entry form).

If you hold your shares in street name, you will receive voting instructions for each account you have with a broker, bank or other nominee.

What matters am I voting on, how may I vote on each matter and how does our Board recommend that I vote on each matter?

The following table sets forth a description of each of the proposals you are being asked to vote on, how you may vote on each proposal and how our Board recommends that you vote on each proposal:

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What is the difference between holding shares as a shareholder of record and as a beneficial owner?

If your shares are registered directly in your name with the Company’s transfer agent, Computershare Inc., you are considered the “shareholder of record” with respect to those shares. The full set of proxy materials has been sent directly to you.

If your shares are held with a broker or in an account at a bank, you are considered the “beneficial owner” with respect to those shares. These shares are sometimes referred to as being held “in street name.” The full set of proxy materials would have been forwarded to you by your broker, bank or other holder of record who is considered the shareholder of record with respect to those shares. As the beneficial owner, you have the right to direct your broker, bank or other nominee on how to vote your shares by using the voting instruction card included in the mailing or by following the instructions on the enclosed proxy card for voting online or by telephone. You will not be able to vote these shares directly unless you obtain a signed legal proxy from your broker, bank or other nominee giving you the right to vote the shares.

How do I vote if I am the shareholder of record?

As a shareholder of record, you may vote your shares in any one of the following ways:

Whether or not you plan to attend our Annual Meeting, we urge you to vote. Returning the proxy card or voting by telephone or online will not affect your right to attend our Annual Meeting and vote in person.

How do I vote if I am a beneficial owner?

As the beneficial owner, you have the right to direct your broker, bank or other nominee how to vote your shares by following the instructions that your broker, bank or other nominee sent to you. You will receive proxy materials and voting instructions for each account that you have with a broker, bank or other nominee. As a beneficial owner, if you wish to change the voting instructions that you have provided your broker, bank or other nominee, you should follow the instructions that your broker, bank or other nominee sent to you.

As a beneficial owner, you are also invited to attend our Annual Meeting. However, since you are not the shareholder of record, you may not vote your shares in person at the meeting unless you obtain a signed legal proxy from your broker, bank or other nominee giving you the right to vote the shares.

What if I am a beneficial owner and do not give voting instructions to my broker?

If you are a beneficial owner of shares, your broker, bank or other nominee is not permitted to vote on your behalf on the election of directors and any other matters to be considered at the Annual Meeting, except for Proposal 2 (the ratification of the appointment of Ernst & Young LLP as our independent registered public accounting firm for the fiscal year ending September 30, 2023), unless you provide specific instructions by completing and returning the voting instruction form or following the instructions provided to you to vote your shares on the Internet or by telephone. If you do not provide voting

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instructions, your shares will not be voted on any proposal except for Proposal 2. This is called a “broker non-vote”. For your vote to be counted, you will need to communicate your voting decision to your broker, bank or other nominee before the date of the Annual Meeting.

How can I attend our Annual Meeting?

You are entitled to attend our Annual Meeting only if you were a shareholder of record as of the Record Date or you hold a valid proxy for our Annual Meeting as described in the previous question. Because seating is limited, admission to the meeting will be on a first-come, first-served basis. You should be prepared to present photo identification for admittance. If you are not a shareholder of record but hold shares as a beneficial owner, you should provide proof of beneficial ownership as of the Record Date, such as your most recent account statement prior to January 3, 2023, a copy of the voting instruction card provided by your broker, bank or other nominee, or other similar evidence of ownership.

What can I do if I change my mind after I vote?

If you are a shareholder of record, you can revoke your proxy and/or change your vote any time before completion of voting at our Annual Meeting as follows:

If you hold your shares through a bank, broker or other nominee, you can revoke your proxy and/or change your vote as follows:

All shares represented by valid proxies received and not revoked will be voted at our Annual Meeting in accordance with the shareholder’s specific voting instructions.

What if I return my proxy card or vote by Internet or telephone but do not specify how I want to vote?

If you are a shareholder of record and sign and return your proxy card or complete the online or telephone voting procedures, but do not specify how you want to vote your shares, we will vote them as follows:

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How many shares must be present or represented to conduct business at our Annual Meeting?

Under our Second Amended and Restated Bylaws, a quorum will exist at our Annual Meeting if shareholders holding a majority of the shares entitled to vote at our Annual Meeting are present in person or by proxy. Shareholders of record who return a proxy or vote in person at our Annual Meeting will be considered part of the quorum. Abstentions and broker non-votes are counted as “present” for determining a quorum.

How are votes counted?

In the election of the seven directors, your vote may be cast “FOR” all of the nominees or your vote may be “WITHHELD” with respect to one or more of the nominees. If you withhold your vote with respect to any nominee, your shares will not be considered to have been voted for or against the nominee. Broker discretionary voting is not allowed for the election of directors.

For all other proposals, your vote may be cast “FOR” or “AGAINST,” or you may “ABSTAIN.” If you “ABSTAIN,” it has the same effect as a vote “AGAINST.” If you sign your proxy card with no further instructions and you are a shareholder of record, then your shares will be voted in accordance with the recommendations of our Board. Broker discretionary voting is allowed for Proposal 2.

What is the voting requirement to approve each of the proposals?

The following table sets forth the voting requirements with respect to each of the proposals:

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Other matters that may properly come before our Annual Meeting may require more than a majority vote under our Second Amended and Restated Bylaws, our Second Amended and Restated Articles of Incorporation, the laws of Nevada or other applicable laws. We do not know of any such matters as of the date of this Proxy Statement.

Who will count the votes?

Our Executive Vice President, General Counsel and Secretary, Brian S. Gillman, will tabulate the votes and act as the inspector of election.

Where can I find the voting results?

We will announce the preliminary voting results at our Annual Meeting. We will also publish voting results in a Current Report on Form 8-K that we will file with the SEC within four business days of our Annual Meeting. If on the date of such Form 8-K filing the inspector of election for our Annual Meeting has not certified the voting results as final, we will note in the filing that the results are preliminary and publish the final results in a subsequent Form 8-K filing within four business days after the final voting results are known.

Who will pay the costs of soliciting these proxies?

We will bear the entire cost of solicitation of proxies, including preparation, assembly, printing and mailing of this Proxy Statement, the proxy card and any additional information furnished to shareholders. Copies of solicitation materials will be furnished to banks, brokers and other nominees holding shares of voting stock beneficially owned by others to forward to such beneficial owners. We may reimburse banks, brokers and other nominees for their reasonable costs of forwarding proxy materials to beneficial owners. Original solicitation of proxies may be supplemented by electronic means, mail, facsimile, telephone or personal solicitation by our directors, officers or other employees. No additional compensation will be paid to our directors, officers or other employees for such services.

Are you “house holding” for shareholders sharing the same address?

The SEC has adopted rules that permit companies and intermediaries such as brokers to satisfy delivery requirements for proxy statements and annual reports with respect to two or more shareholders sharing the same address by delivering a single proxy statement or annual report, as applicable, addressed to those shareholders. This process, which is commonly referred to as “house holding,” potentially provides extra convenience for shareholders and cost savings for companies.

We have not instituted house holding for shareholders of record. However, certain brokerage firms may have instituted house holding for beneficial owners of shares of our common stock held through brokerage firms. If your household has multiple accounts holding shares of our common stock, you may have already received a house holding notification from your broker. Please contact your broker directly if you have any questions or require additional copies of this Proxy Statement. The broker will arrange for delivery of a separate copy of this Proxy Statement promptly upon your request. Our shareholders may decide at any time to revoke a decision to household, and thereby receive multiple copies.

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What is the deadline for shareholders to propose actions for consideration at our annual meeting of shareholders for the fiscal year ending September 30, 2023?

Shareholders who wish to nominate persons for election to our Board or propose other matters to be considered at our annual meeting of shareholders for the fiscal year ending September 30, 2023 must provide us advance notice of the director nomination or shareholder proposal, as well as the information specified in our Second Amended and Restated Bylaws, no earlier than October 27, 2023, and no later than November 26, 2023. Shareholders are advised to review our Second Amended and Restated Bylaws, which contain the requirements for advance notice of director nominations and shareholder proposals. Notice of director nominations and shareholder proposals must be mailed to our Executive Vice President, General Counsel and Secretary at 410 North 44th Street, Suite 700, Phoenix, Arizona 85008. The requirements for advance notice of shareholder proposals under our Second Amended and Restated Bylaws do not apply to proposals properly submitted under Rule 14a-8 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), as those shareholder proposals are governed by Rule 14a-8. We reserve the right to reject, rule out of order or take other appropriate action with respect to any director nomination or shareholder proposal that does not comply with our Second Amended and Restated Bylaws and other applicable requirements.

September 4, 2023 is the deadline for shareholders to submit proposals to be included in our proxy statement under Rule 14a-8 under the Exchange Act. However, if the date of our annual meeting of shareholders for the fiscal year ending September 30, 2023 is changed by more than 30 days from the anniversary of the date of the previous year’s meeting, then the deadline will be a reasonable time before we begin to print and send our proxy statement for our annual meeting of shareholders for the fiscal year ending September 30, 2023. Proposals by shareholders must comply with all requirements of applicable rules of the SEC, including Rule 14a-8, and be mailed to our Executive Vice President, General Counsel and Secretary at 410 North 44th Street, Suite 700, Phoenix, Arizona 85008. We reserve the right to reject, rule out of order or take other appropriate action with respect to any proposal that does not comply with Rule 14a-8 and other applicable requirements.

What are the implications of being an “emerging growth company”?

We are an “emerging growth company” under applicable federal securities laws and are therefore permitted to take advantage of certain reduced public company reporting requirements. As an emerging growth company, we provide in this Proxy Statement the scaled disclosure permitted under the Jumpstart Our Business Startups Act of 2012, including certain executive compensation disclosures required of a “smaller reporting company,” as that term is defined in Rule 12b-2 under the Exchange Act. In addition, as an emerging growth company, we are not required to conduct votes seeking approval, on an advisory basis, of the compensation of our NEOs or the frequency with which such votes must be conducted. We will remain an emerging growth company until the earliest of (i) the last day of the fiscal year following the fifth anniversary of the completion of our initial public offering (our “IPO”), (ii) the last day of the first fiscal year in which our annual gross revenue is $1.07 billion or more, (iii) the date on which we have, during the previous rolling three-year period, issued more than $1 billion in non-convertible debt securities or (iv) the date on which we are deemed to be a “large accelerated filer” as defined in the Exchange Act.

Who should I call if I have any questions?

If you have any questions about our Annual Meeting or your ownership of our voting stock, please contact our transfer agent at:

Computershare, Inc.

250 Royall Street

Canton, MA 02021

Telephone: (212) 805-7100

Website Address: www.computershare.com/us

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Board of Directors

and Corporate Governance

We are strongly committed to good corporate governance practices. These practices provide an important framework within which our Board and management can pursue our strategic objectives for the benefit of our shareholders. Our Board has adopted Amended and Restated Corporate Governance Guidelines (our “Corporate Governance Guidelines”) that set forth the role of our Board, director independence standards, Board structure and functions, director selection considerations and other governance policies. In addition, our Board has adopted written charters for each of our Audit Committee, Compensation Committee and Nominating and Corporate Governance Committee, as well as the Mesa Air Group, Inc. Code of Conduct and Ethics (our “Code of Conduct”) that applies to all of our employees, officers and directors and all of our subsidiaries. Our Nominating and Corporate Governance Committee reviews our Corporate Governance Guidelines annually and recommends changes to our Board as warranted. Our Corporate Governance Guidelines, our committee charters, and our Code of Conduct, and any waivers or amendments to our Code of Conduct, are all available on our investor relations website (http://investor.mesa-air.com) in the “Corporate Governance – Governance Overview” section.

Director Independence

Our common stock is listed on The Nasdaq Global Select Market (“Nasdaq”). Under the listing requirements and rules of Nasdaq, independent directors must comprise a majority of our Board. In addition, the rules of Nasdaq require that, subject to specified exceptions, each member of a listed company’s audit, compensation and nominating and corporate governance committees be independent. Under Nasdaq rules, a director will only qualify as an “independent director” if, in the opinion of that company’s board of directors, that person does not have a relationship that would interfere with the exercise of independent judgment in carrying out the responsibilities of a director. Compensation committee members must not have a relationship with us that is material to the director’s ability to be independent from management in connection with the duties of a compensation committee member. Additionally, audit committee members must also satisfy the independence criteria set forth in Rule 10A-3 under the Exchange Act. To be considered independent for purposes of Rule 10A-3, a member of an audit committee of a listed company may not, other than in his or her capacity as a member of the audit committee, the board of directors or any other board committee, accept, directly or indirectly, any consulting, advisory or other compensatory fee from the listed company or any of its subsidiaries or be an affiliated person of the listed company or any of its subsidiaries.

Our Board has undertaken a review of its composition, the composition of its committees and the independence of each director. Based upon information requested from and provided by each director concerning his or her background, employment and affiliations, including family relationships, our Board has determined that, other than Jonathan G. Ornstein, our Chairman and Chief Executive Officer, our directors do not have any relationships that would interfere with the exercise of independent judgment in carrying out the responsibilities of a director and that each of these directors is “independent” as that term is defined under the applicable rules and regulations of the SEC and the listing requirements and rules of Nasdaq. Accordingly, a majority of our directors are independent, as required under applicable Nasdaq listing rules. In making this determination, our Board considered the current and prior relationships that each non-employee director has with the Company and all other facts and circumstances our Board deemed relevant in determining their independence.

Board Leadership

Although our Board does not have a formal policy as to whether the roles of Chairman of our Board and Chief Executive Officer should be combined or separated, Mr. Ornstein serves as both the

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Chairman of our Board and our Chief Executive Officer. Our Board believes that the current board leadership structure, coupled with a strong emphasis on board independence, provides effective independent oversight of management while allowing our Board and management to benefit from Mr. Ornstein’s extensive executive leadership and operational experience. On April 9, 2019, the Board established the position of Presiding Independent Director (i.e., Lead Director) and appointed Harvey W. Schiller to serve in that capacity. Mr. Schiller has served on the Company’s Board since 2011, and currently serves as Chair of the Board’s Compensation Committee and a member of the Nominating and Corporate Governance Committee. The Presiding Independent Director is responsible for, among other things, organizing and chairing executive sessions of the independent directors serving on the Company’s Board, acting as a liaison between the Company’s Chairman of the Board and the Board’s independent directors, and carrying out such other responsibilities as defined by the Board.

Executive Sessions of Non-Employee Directors

To encourage and enhance communication among non-employee directors, and as required under applicable Nasdaq rules, our Corporate Governance Guidelines provide that the non-employee directors will meet in executive sessions without management directors or our management on a periodic basis. Accordingly, our Board holds executive sessions at which only those directors who are “independent,” within the meaning of currently applicable Exchange Act rules and the Nasdaq Listing Rules, are present. In accordance with our Corporate Governance Guidelines, the presiding director at the executive sessions is Mr. Schiller, as the Presiding Independent Director.

Communications with our Board of Directors

Shareholders or interested parties who wish to communicate with our Board or with an individual director may do so by mail to our Board or the individual director, care of our Executive Vice President, General Counsel and Secretary at 410 North 44th Street, Suite 700, Phoenix, Arizona 85008. The communication should indicate that it contains a shareholder or interested party communication. In accordance with our Corporate Governance Guidelines, all such communications will be reviewed by our Executive Vice President, General Counsel and Secretary, in consultation with appropriate directors as necessary, and, if appropriate, will be forwarded to the director or directors to whom the communications are addressed or, if none are specified, to the Chairman of our Board.

Committees of our Board of Directors

Our Board has established an Audit Committee, a Compensation Committee and a Nominating and Corporate Governance Committee which have the composition and responsibilities described below. Our Board may establish other committees to facilitate the management of our business. Copies of the charters of our Audit Committee, Compensation Committee and Nominating and Corporate Governance Committee are available in the “Corporate Governance – Governance Overview” section of our investor relations website (http://investor.mesa-air.com). Members serve on these committees until their resignation or until otherwise determined by our Board.

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The following table sets forth the standing committees of our Board and the members of each such committee as of the date of this Proxy Statement:

Audit Committee

Our Audit Committee consists of Ms. Artist and Messrs. Gordon and Lockhart, with Ms. Artist serving as our Audit Committee Chair. Pursuant to our Audit Committee charter, Audit Committee membership shall consist of at least three Board members, all of whom qualify as independent within the meaning of our Corporate Governance Guidelines and satisfy the independence requirements of the Nasdaq Listing Rules and Rule 10A-3(b)(1) under the Exchange Act. Our Audit Committee charter also requires members to have financial literacy and familiarity with fundamental financial statements that would allow them to understand key business and financial controls in the primary industries in which we operate.

Our Board has determined that Ms. Artist and Messrs. Gordon and Lockhart are independent under the Nasdaq Listing Rules and Rule 10A-3(b)(1) under the Exchange Act. In addition, our Board has determined that Ms. Artist is an “audit committee financial expert” within the meaning of SEC regulations. Our Board has also determined that each member of our Audit Committee can read and understand fundamental financial statements in accordance with applicable requirements. In arriving at these determinations, our Board has examined each Audit Committee member’s scope of experience and the nature of his or her employment in the corporate finance sector.

The primary purpose of our Audit Committee is to discharge the responsibilities of our Board with respect to our accounting, financial and other reporting and internal control practices and to oversee our independent registered public accounting firm. Specific responsibilities of our Audit Committee include:

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Compensation Committee

Our Compensation Committee currently consists of Messrs. Gordon, McHugh and Schiller, with Mr. Schiller serving as our Compensation Committee Chair. Pursuant to our Compensation Committee charter, our Compensation Committee shall consist of a minimum of three directors, each of whom shall meet Nasdaq’s independence requirements. Our Board has determined that each member of our Compensation Committee is independent under the Nasdaq Listing Rules and is a “non-employee director” as defined in Rule 16b-3 under the Exchange Act.

The primary purpose of our Compensation Committee is to discharge the responsibilities of our Board to oversee our compensation policies, plans and programs, and to review and determine the compensation to be paid to our executive officers, directors and other senior management, as appropriate. Specific responsibilities of our Compensation Committee include:

Compensation Committee Interlocks and Insider Participation

None of the members of our Compensation Committee is or has been an executive officer of Mesa Air Group, nor did any of them have any relationships requiring disclosure by us under Item 404 of SEC Regulation S-K. With the exception of Mr. Ornstein, our Chairman and Chief Executive Officer, none of our executive officers served as a director or a member of a compensation committee (or other committee serving an equivalent function) of any other entity, of which an executive officer served as a director of Mesa Air Group or member of our Compensation Committee during the fiscal year ended September 30, 2022.

Nominating and Corporate Governance Committee

Our Nominating and Corporate Governance Committee currently consists of Ms. Artist and Messrs. Schiller and Skiados, with Mr. Skiados serving as our Nominating and Corporate Governance Committee Chair. Pursuant to our Nominating and Corporate Governance Committee charter, our Nominating and Corporate

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Governance Committee shall consist of at least three directors, each of whom shall meet Nasdaq’s independence requirements. Our Board has affirmatively determined that each of Ms. Artist and Messrs. Schiller and Skiados meet the definition of “independent director” for purposes of the Nasdaq Listing Rules.

Specific responsibilities of our Nominating and Corporate Governance Committee include:

Board and Committee Meetings and Attendance

Our Board is responsible for the oversight of Company management, the strategy of the Company and establishing corporate policies. Our Board and its committees meet throughout the year on a regular schedule, and also hold special meetings and act by written consent from time to time. During the fiscal year ended September 30, 2022, our Board met seven times. Each of the regularly scheduled Board meetings included an executive session of only independent directors. Our Audit Committee met five times during the last fiscal year. Our Compensation Committee met four times during the last fiscal year. Our Nominating and Corporate Governance Committee met four times during the last fiscal year. During the fiscal year ended September 30, 2022, each director attended 75% or more of the aggregate number of Board meetings and meetings of the committees on which he or she served. We traditionally encourage our directors and director nominees to attend our Annual Meetings. Not all of our current directors attended our annual meeting of shareholders in 2022 due to the ongoing worldwide COVID-19 pandemic. While we are currently encouraging our directors or director nominees to attend our 2023 Annual Meeting in person, any material changes in the COVID-19 pandemic (or variants thereof) could impact actual Board member attendance at such meeting.

Risk Oversight

Our Board oversees an enterprise-wide approach to risk management, designed to support the achievement of organizational objectives, including strategic objectives, to improve long-term organizational performance and to enhance shareholder value. A fundamental part of risk management is not only understanding the most significant risks a company faces and what steps management is taking to manage those risks, but also understanding what level of risk is appropriate for a given company. Our Board, as a whole, determines the appropriate level of risk for us, assesses the specific risks that we face and reviews management’s strategies for adequately mitigating and managing the identified risks. Although our Board administers this risk management oversight function, the committees of our Board support our Board in discharging its oversight duties and addressing risks inherent in their respective areas.

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Our Audit Committee has the responsibility to consider and discuss our major financial risk exposures and the steps our management has taken to monitor and control these exposures, including guidelines and policies to govern the process by which risk assessment and management is undertaken. Our Audit Committee monitors compliance with legal and regulatory requirements. Our Audit Committee also monitors management’s preparedness for and responses to data security incidents. Our Nominating and Corporate Governance Committee monitors the effectiveness of our Corporate Governance Guidelines. Our Compensation Committee assesses and monitors whether our compensation philosophy and practices have the potential to encourage excessive risk-taking and evaluates compensation policies and practices that could mitigate such risks.

At periodic meetings of our Board and its committees, management reports to and seeks guidance from our Board and its committees with respect to the most significant risks that could affect our business, such as legal, financial, tax and audit-related risks. In addition, among other matters, management provides our Audit Committee periodic reports on our compliance programs and investment policy and practices.

Nominations Process and Director Qualifications

Nomination to our Board of Directors

Candidates for nomination to our Board are selected by our Board based on the recommendations of our Nominating and Corporate Governance Committee in accordance with our Nominating and Corporate Governance Committee charter, our policies, our Second Amended and Restated Articles of Incorporation, our Second Amended and Restated Bylaws, our Corporate Governance Guidelines and the criteria adopted by our Board regarding director candidate qualifications. In recommending candidates for nomination, our Nominating and Corporate Governance Committee considers candidates recommended by directors, officers and employees, as well as candidates that are properly submitted by shareholders in accordance with our policies and our Second Amended and Restated Bylaws, using the same criteria to evaluate all such candidates. Evaluations of candidates generally involve a review of background materials, internal discussions and interviews with selected candidates as appropriate and, in addition, our Nominating and Corporate Governance Committee may engage consultants or third-party search firms to assist in identifying and evaluating potential director nominees.

Additional information regarding the process for properly submitting shareholder nominations for candidates for membership on our Board is set forth above under “Questions and Answers About Proxy Materials and Voting.”

Director Qualifications

With the goal of developing a diverse, experienced and highly qualified board of directors, our Nominating and Corporate Governance Committee is responsible for developing and recommending to our Board the desired qualifications, expertise and characteristics of members of our Board, including qualifications that our Nominating and Corporate Governance Committee believes must be met by a committee-recommended nominee for membership on our Board and specific qualities or skills that our Nominating and Corporate Governance Committee believes are necessary for one or more of the members of our Board to possess.

In addition to the qualifications, qualities, and skills that are necessary to meet U.S. legal and regulatory requirements, Nasdaq’s listing requirements, the provisions of our Second Amended and Restated Articles of Incorporation and our Second Amended and Restated Bylaws, our Corporate Governance Guidelines and each of the charters of our Board committees, our Nominating and

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Corporate Governance Committee requires the following minimum qualifications to be satisfied by any nominee for a position on our Board:

Our Board and Nominating and Corporate Governance Committee believe that a diversely skilled, experienced and highly qualified board of directors fosters a robust, comprehensive and balanced decision-making process for the continued effective functioning of our Board and success of the Company. Accordingly, through the nomination process, our Nominating and Corporate Governance Committee seeks to promote Board membership that reflects diversity, factoring in gender, race, ethnicity, differences in professional background, education, skill, experience and other individual qualities and attributes that contribute to the total mix of viewpoints and experience. Our Nominating and Corporate Governance Committee evaluates the foregoing factors, among others, and does not assign any particular weighting or priority to any of the factors.

Proposal 1 sets forth a brief biographical description of each nominee’s primary individual experience, qualifications, attributes and skills that led our Board to recommend such nominee to serve as a member of our Board.

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PROPOSAL 1:

ELECTION OF DIRECTORS

(Item No. 1 on the Proxy Card)

Composition of our Board of Directors

Our Board currently consists of seven directors. All directors serve a one-year term and are subject to re-election each year.

On the recommendation of our Nominating and Corporate Governance Committee, our Board has nominated the following persons for election as directors at our Annual Meeting:

If elected, each nominee will serve until his or her term expires at our annual meeting of shareholders for the fiscal year ending September 30, 2023 or until his or her successor is duly elected and qualified. See “Director Nominees” below for more information about each nominee.

All of the nominees are currently serving as directors of Mesa Air Group and have consented to being named as nominees. Shareholders voting in person or by proxy at our Annual Meeting may only vote for seven nominees. If, prior to our Annual Meeting, any of the nominees becomes unable to serve as a director, our Board may designate a substitute nominee. In that event, the persons named as proxies intend to vote for the substitute nominee designated by our Board.

Our Board and our Nominating and Corporate Governance Committee believe that each of the above nominees possesses the experience and qualifications that directors of Mesa Air Group should possess, as described in detail below, and that the experience and qualifications of each nominee compliments the experience and qualifications of the other nominees. The experience and qualifications of each nominee, including information regarding the specific experience, qualifications, attributes and skills that led our Board and our Nominating and Corporate Governance Committee to conclude that he or she should serve as a director of Mesa Air Group at the present time, in light of our business and structure, are set forth below.

Vote Required

If a quorum is present, directors are elected by a plurality of the votes of the holders of shares present at the meeting or represented by proxy and entitled to vote on the election of directors. Accordingly, the nominees receiving the highest number of affirmative votes will be elected. Shares represented by executed proxies will be voted, if authority to do so is not withheld, for the election of the nominees named below. If a nominee becomes unavailable for election as a result of an unexpected occurrence, shares that would have been voted for that nominee will instead be voted for the election of a substitute nominee proposed by us.

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Our Board recommends a vote “FOR” the election of all seven nominees listed below.

Ellen N. Artist

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Mitchell I. Gordon

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Dana J. Lockhart

Daniel J. McHugh

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Jonathan G. Ornstein

Spyridon P. Skiados

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Brigadier General Harvey W. Schiller, USAF, Ret.

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Board Diversity

In August 2021, the SEC approved the Nasdaq’s Board Diversity Rule, which requires all companies listed on Nasdaq’s U.S. exchange to publicly disclose board-level diversity statistics and have, or explain why they do not have, at least two diverse directors. The below Board Diversity Matrix provides the diversity statistics for our Board in the format required by the rule. As disclosed in our Annual Report on Form 10-K for the fiscal year ended September 30, 2022, the Company was focused on restructuring its operations with its major partners during fiscal 2022 and did not believe bringing on a new Board member during this process was appropriate.

Board Diversity Matrix (As of August 8, 2022)

Non-Employee Director Compensation

Fees. The following fees were paid to our non-employee directors during the 2022 election year. Directors who are our full-time employees receive no additional compensation for serving as directors. Board members are also reimbursed for all expenses associated with attending Board or committee meetings.

The following table sets forth information concerning the compensation earned by or paid to our non-employee directors during the fiscal year ended September 30, 2022:

Equity Awards. Equity awards are made to our non-employee directors on an annual basis. The types and amounts of such awards are set by our Compensation Committee. During the fiscal year ended September 30, 2022, each non-employee director received a restricted common stock award in the aggregate amount of $89,700.

Other benefits. As is common in the airline industry, we provide flight benefits to the members of our Board, whereby each non-employee director and certain family members of directors receive free or reduced-fare travel on flights flown by our major airline partners at no cost to us or the director. We believe that our directors’ use of free air travel is de minimis and we did not maintain any records of non-employee directors’ travel during the fiscal year ended September 30, 2022.

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Fiscal 2022 Director Compensation Table

The following table sets forth information regarding compensation earned by our non-employee directors during the 2022 election year:

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Report of the Audit Committee

The Audit Committee selects and retains an independent registered public accounting firm as the Company’s independent auditor and assists the Board in overseeing (1) the integrity of the Company’s financial statements, (2) the independent auditor’s qualifications and independence, (3) the performance of the Company’s internal audit function and independent auditor, and (4) the compliance by the Company with legal and regulatory requirements related to financial affairs and reporting. The Board of Directors has adopted a written charter for the Audit Committee that addresses the responsibilities of the Audit Committee. This charter is available on our investor relations website (http://investor.mesa-air.com) in the “Corporate Governance – Governance Overview” section.

While the Audit Committee has the responsibilities and powers set forth in its charter, it is not the duty of the Audit Committee to plan or conduct audits or to determine that the Company’s financial statements and disclosures are complete and accurate and are in accordance with generally accepted accounting principles and applicable legal and other requirements. These are the responsibilities of management and the independent auditor. Additionally, in performing its oversight function, the Audit Committee necessarily relies on the work and assurances of, and information provided by, management and the independent auditor.

Ernst & Young LLP (“Ernst & Young”) served as the Company’s independent auditor for the fiscal year ended September 30, 2022. In fiscal 2022, the Audit Committee met and held discussions with management and Ernst & Young on numerous occasions. In fulfilling its oversight responsibilities, the Audit Committee reviewed and discussed with management and Ernst & Young the Company’s quarterly financial statements prior to the filing of each Quarterly Report on Form 10-Q and the audited financial statements included in the Annual Report on Form 10-K for the fiscal year ended September 30, 2022. The Audit Committee discussed with Ernst & Young matters required to be discussed by the applicable Public Company Accounting Oversight Board (“PCAOB”) and the SEC. The Audit Committee received the written disclosures and the letter from Ernst & Young required by applicable requirements of the PCAOB regarding the independent accountant’s communications with the Audit Committee concerning independence, and the Audit Committee discussed with Ernst & Young the firm’s independence and tenure.

Based upon the Audit Committee’s discussions with management and the independent auditor, and the Audit Committee’s review of the representations of management and the report of the independent auditor to the Audit Committee, the Audit Committee recommended to the Board of Directors that the audited financial statements be included in the Company’s Annual Report on Form 10-K for the fiscal year ended September 30, 2022, as filed with the SEC.

Submitted by the Audit Committee

Ellen N. Artist (Chair)

Mitchell I. Gordon

Dana J. Lockhart

The material in this report is not “soliciting material,” is not deemed “filed” with the SEC or subject to Regulations 14A or 14C or the liabilities of Section 18 of the Exchange Act, and shall not to be deemed incorporated by reference in any filing of Mesa Air Group under the Securities Act of 1933, as amended, or the Exchange Act, whether made before or after the date hereof and irrespective of any general incorporation language in any such filing.

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PROPOSAL 2:

RATIFICATION OF APPOINTMENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

(Item No. 2 on the Proxy Card)

It is the responsibility of the Audit Committee to select and retain independent auditors. Our Audit Committee has appointed Ernst & Young as our independent auditors for the Company’s fiscal year ending September 30, 2023. Although shareholder ratification of the Audit Committee’s selection of independent auditors is not required by our Second Amended and Restated Bylaws or otherwise, we are submitting the selection of Ernst & Young for shareholder ratification as a matter of good corporate governance and so that our shareholders may participate in this important corporate decision. If not ratified, the Audit Committee will reconsider the selection, although the Audit Committee will not be required to select different independent auditors for the Company. Even if the appointment is ratified, our Board may direct the appointment of different independent auditors at any time during the year if they determine that such a change would be in the best interests of Mesa Air Group and its shareholders.

A representative of Ernst & Young LLP is expected to be present at the Annual Meeting and will be available to respond to appropriate questions and, if they desire, to make a statement.

VOTE REQUIRED

An affirmative vote from holders of a majority in voting power of the shares present at the Annual Meeting or represented by proxy and entitled to vote on the proposal is required to ratify the selection of Ernst & Young as the Company’s independent registered public accounting firm for the fiscal year ending September 30, 2023. In the event that our stockholders fail to ratify the selection, it will be considered a recommendation to the Board and the Audit Committee to consider other auditors for next year. However, because of the difficulty in making any substitution of auditors after the beginning of the current year, the appointment for 2023 will stand, unless the Audit Committee determines there is a reason to make a change.

Our Board recommends a vote “FOR” the ratification of Ernst & Young LLP as our independent registered public accounting firm for the fiscal year ending September 30, 2023.

AUDIT AND NON-AUDIT FEES

The following table presents fees for professional audit services rendered by Ernst & Young, our independent auditor, for the fiscal years ended September 30, 2022 and 2021:

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POLICY ON AUDIT COMMITTEE PRE-APPROVAL OF AUDIT AND PERMISSIBLE NON-AUDIT SERVICES OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Consistent with the requirements of the SEC and the PCAOB regarding auditor independence, our Audit Committee has responsibility for appointing, setting compensation, retaining and overseeing the work of our independent registered public accounting firm. In recognition of this responsibility, our Audit Committee has adopted a policy and procedures for the pre-approval of audit and non-audit services rendered by our independent registered public accounting firm to the Company. The policy generally pre-approves specified services in the defined categories of audit services, audit-related services and tax services up to specified amounts. Pre-approval may also be given as part of our Audit Committee’s approval of the scope of the engagement of the independent auditor or on an individual, explicit and case-by-case basis before the independent auditor is engaged to provide each service. All of the services provided by Ernst & Young for the fiscal years ended September 30, 2022 and September 30, 2021 described above were pre-approved by our Audit Committee or our Board. Our Audit Committee determined that the rendering of services other than audit services by Ernst & Young was compatible with maintaining the principal accountant’s independence.

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Security Ownership of Certain Beneficial Owners and Management

The table below sets forth certain information with respect to the beneficial ownership of our common stock as of December 7, 2022 by:

The percentage of shares beneficially owned listed in the table below is based on 35,963,984 shares of our common stock outstanding as of December 7, 2022. In computing the number of shares beneficially owned and the percentage ownership of each of the beneficial owners listed in the table below, we deemed to be outstanding all shares of restricted common stock that have vested or will vest within 60 days of December 7, 2022, and all warrants exercisable within 60 days of December 7, 2022. Beneficial ownership is determined in accordance with the rules of the SEC and generally includes any shares over which a person exercises sole or shared voting or investment power. Unless otherwise indicated, the persons or entities identified in the table below have sole voting and investment power with respect to all shares shown to be beneficially owned by them, subject to applicable community property laws. The information contained in the table below is not necessarily indicative of beneficial ownership for any other purpose, and the inclusion of any shares in the table below does not constitute an admission of beneficial ownership of those shares. Except as otherwise noted below, the address for persons listed in the table below is c/o Mesa Air Group, Inc., 410 North 44th Street, Suite 700, Phoenix, Arizona 85008. The information provided in the table below is based on our records, information filed with the SEC and information provided to us, except where otherwise noted:

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Executive Officers

In addition to Mr. Ornstein, the table below sets forth biographical information for each of our executive officers not discussed above, as of the date of this Proxy Statement:

Michael J. Lotz. Mr. Lotz serves as our President, and has been with us since 1998, serving as President since 2000. Mr. Lotz also served as our Chief Financial Officer from 1998 to October 1, 2021. From 1995 to 1998, Mr. Lotz worked with Mr. Ornstein, first at Continental Express as senior director of purchasing, later as vice president of airport operations, and then at Virgin Express S.A./N.V. in Brussels as chief operating officer, where the two eventually took the company public. From 1987 to 1995, Mr. Lotz served in various roles at Continental Airlines, ultimately serving as senior director of contract services and airport administration. Mr. Lotz received a B.B.A. in Financial Accounting from Iona College.

Brian S. Gillman. Mr. Gillman has served as our Executive Vice President, General Counsel and Secretary since 2013. From February 2011 to September 2013, Mr. Gillman served as executive vice president and general counsel at Global Aviation Holdings Inc. From 2001 to February 2011, Mr. Gillman served as our Executive Vice President and General Counsel. From 1996 to 2001, Mr. Gillman was vice president, general counsel and secretary at Vanguard Airlines, Inc. in Kansas City, Missouri. From 1994 to 1996, Mr. Gillman practiced corporate and securities law at Stinson, Mag & Fizzell, P.C. (now known as Stinson Leonard Street LLP) in Kansas City, Missouri. Mr. Gillman received his J.D. and B.B.A. in Accounting from the University of Iowa.

Bradford R. Rich. Mr. Rich has served as our Chief Operating Officer since March of 2019. From 2017 to 2019, Mr. Rich served as United Airlines’ Senior Vice President of United Express Operations, where he oversaw the carrier’s relationship with its regional partners, including the Company. Prior to his role with United, Mr. Rich spent 27 years at SkyWest, Inc. where he played a key role in the company’s growth, the development of flying contracts with several major carriers, and lead negotiations for multiple large-scale acquisitions. During his tenure at SkyWest, Mr. Rich spent 20 years as chief financial officer and three years as president. Mr. Rich received a B.S. in Accounting from Utah State University.

Torque Zubeck. Mr. Zubeck has served as Chief Financial Officer of the Company since October 1, 2021, and as Senior Vice President of Finance from February 2021 until his appointment as Chief Financial Officer. Prior to joining the Company, Mr. Zubeck worked for Alaska Airlines serving in several senior executive roles over the last 10 years leading the Financial & Strategic planning group, Audit Programs, the Virgin America Integration Management office, and the Cargo business unit. Mr. Zubeck holds a bachelor’s degree from Stanford University and a Master’s in Business Administration with Honors from Eastern Michigan.

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Executive Compensation

Our NEOs, consisting of our principal executive officer and our next four most highly compensated executive officers as of September 30, 2022, were:

Under the SEC’s rules governing proxy disclosure, emerging growth companies like the Company are only required to disclose compensation information for three NEOs (including the CEO). The Company has voluntarily elected to disclose compensation information for Messrs. Rich and Zubeck.

Processes and Procedures for Compensation Decisions

Our Compensation Committee is responsible for the executive compensation programs for our executive officers and reports to our Board on its discussions, decisions and other actions. Our Chief Executive Officer, and from time to time as necessary, in consultation with our Chief Executive Officer and President, makes recommendations to our Compensation Committee regarding short-term and long-term compensation for all of our executive officers (other than himself) based on our results, as well as an individual executive officer’s contribution toward the Company’s results and their performance toward individual goal achievement. Our Compensation Committee then reviews the recommendations and other data and makes decisions as to the total compensation for each executive officer, as well as each individual compensation component.

During 2019, the Compensation Committee engaged Mercer LLC (“Mercer”), an independent executive compensation advisory firm, as the Compensation Committee’s independent compensation advisor. In doing so the Compensation Committee reviewed information regarding the independence and potential conflicts of interest of Mercer. The Compensation Committee members took into account, among other things, the factors enumerated by the SEC and Nasdaq for evaluating compensation advisor independence and concluded that Mercer is independent and that no conflict of interest exists. Representatives of Mercer have direct access to Compensation Committee members without management involvement. The Compensation Committee at any time has sole authority to replace its compensation consultant and/or legal counsel from time to time and hire additional consultant, legal counsel and such other advisors as necessary to assist with the execution of its duties and responsibilities.

As a result of Mercer’s engagement, the Compensation Committee recommended the following changes to non-employee director compensation: (i) a $10,000 increase in annual cash compensation, and (ii) a $15,000 increase in the value of the annual equity grants made to non-employee directors. The Committee also recommended an increase in the annual base salary and annual equity grant for Mr. Gillman, as described elsewhere in this Proxy Statement. No other action was taken with respect to executive compensation in fiscal 2019.

We did not engage Mercer to provide any compensation consulting services in fiscal 2022, fiscal 2021, or fiscal 2020 and no action was taken with respect to executive compensation in such fiscal periods. In addition, under the terms of our Loan and Guarantee Agreement with The United States Department of the Treasury entered into 2021, we are required to comply with certain covenants that restrict changes to the total compensation of certain of our executive officers whose compensation exceeds a specified threshold. As such, we did not engage a compensation consultant for such period.

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Summary Compensation Table

The following table sets forth all of the compensation awarded to, earned by or paid to our NEOs during our fiscal years 2022 and 2021:

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Employment and Separation Agreements with Named Executive Officers

Jonathan G. Ornstein

We entered into an employment agreement with Mr. Ornstein on February 23, 2011, effective as of March 1, 2011, to serve as the Chairman of our Board and as our Chief Executive Officer, which agreement was amended first effective as of January 22, 2014, again effective as of June 1, 2016, and again on July 26, 2018, to consolidate the prior amendments. Under Mr. Ornstein’s employment agreement, as amended and restated, we may terminate Mr. Ornstein’s employment at any time with

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prior written notice at least one year before the intended termination date. Mr. Ornstein’s employment agreement entitles him to a base salary and an opportunity to earn a cash incentive bonus, paid on a quarterly basis based upon achievement of certain benchmarks mutually agreed upon by our Board and Mr. Ornstein. Mr. Ornstein is also entitled to receive an annual equity award pursuant to the terms of our then-existing equity incentive plan, as determined by our Board or our Compensation Committee, in its sole discretion, provided that such award shall have a grant date value of not less than $800,000 for the fiscal year ended September 30, 2016 and any fiscal year thereafter during the term of the agreement. Mr. Ornstein’s employment agreement entitles him to participate in all employee benefit plans and arrangements available to our executive officers, including flight benefits. It also contains certain confidential information covenants prohibiting Mr. Ornstein from using or disclosing any of our confidential information, other than as required in the performance of his duties as our Chairman and Chief Executive Officer, during the term of his employment and for two years thereafter.

Mr. Ornstein’s employment agreement also provides him with severance in the event his employment is terminated without Cause (as defined below) by us (or, in certain circumstances, by our successor-in-interest) or if he resigns for Good Reason (as defined below). If Mr. Ornstein’s employment is terminated by us without Cause or he resigns for Good Reason he is entitled to payment equal to two times the sum of his base salary, plus an amount equal to the greater of (i) his target annual performance bonus or (ii) half the bonuses (incentive or otherwise) earned by Mr. Ornstein with respect to the two fiscal years immediately preceding his termination. If Mr. Ornstein is terminated by us or our successor-in-interest without Cause or he resigns for Good Reason within 12 months following a Change of Control (as defined below), he is entitled to payment equal to three times the sum of his base salary, plus the greater of (i) his target performance bonus for the fiscal year in which the termination occurs or (ii) the highest amount of the bonuses (incentive or otherwise) paid to Mr. Ornstein with respect to the three fiscal years immediately preceding the year in which his termination occurs. Upon Mr. Ornstein’s termination without Cause or resignation for Good Reason, he is also entitled to the payment of continued health, dental and vision insurance premiums for himself and any covered dependents for 24 months following termination, and he is entitled to immediate vesting of any unvested equity awards.

For purposes of Mr. Ornstein’s employment agreement, “Cause” means (i) Mr. Ornstein’s willful misconduct, including, but not limited to, misappropriation of trade secrets, fraud or embezzlement; (ii) Mr. Ornstein’s commission of a felony offense or any crime involving dishonesty or physical harm to any person; (iii) Mr. Ornstein’s material breach of his employment agreement that, if curable, is not cured within 30 days following written notice from us; or (iv) Mr. Ornstein’s willful refusal to follow a lawful directive of us, which refusal is not cured within 30 days following written notice from us. “Change of Control” means that (i) any person acquires more than 50% of the voting power of our then-outstanding securities; (ii) a majority of the members of our Board is replaced during any 12-month period by directors whose appointment or election is not endorsed by a majority of our Board before the date of appointment or election; (iii) a tender offer or exchange offer is made where the intent of such offer is to take over control of Mesa Air Group, and such offer is consummated for the securities representing more than 50% of the combined voting power of our then-outstanding voting securities over a twelve-month period; or (iv) a reorganization, merger, consolidation, or sale or other disposition of all or substantially all of our assets. Finally, “Good Reason” means any of the following, if not cured within 20 days of our receipt of a notice of termination by Mr. Ornstein: (i) any change by us in Mr. Ornstein’s title, or any significant diminishment in Mr. Ornstein’s function, duties or responsibilities from those associated with his functions, duties or responsibilities as of January 1, 2011; (ii) any material breach of the employment agreement or any other agreement between us and Mr. Ornstein which remains uncured for a period of 10 days after Mr. Ornstein gives us notice of such breach; (iii) except with Mr. Ornstein’s prior written consent, relocation of Mr. Ornstein’s principal place of employment to a location greater than 50 miles from Phoenix, Arizona, or requiring Mr. Ornstein to

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provide his services outside of Maricopa County, Arizona, for more than 50% of his working days during any consecutive six-month period; or (iv) any reduction of Mr. Ornstein’s base salary, bonus opportunity or benefits, other than under circumstances in which we have imposed cuts in salary of other officers on an across-the-board basis (in which case the cuts to Mr. Ornstein’s compensation must not be in a greater percentage than the reduction imposed on any other officer).

Michael J. Lotz

We entered into an employment agreement with Mr. Lotz on February 23, 2011, effective as of March 1, 2011, to serve as our President and Chief Financial Officer, which agreement was amended first effective as of January 22, 2014, again effective as of June 1, 2016, and again on July 26, 2018, to consolidate the prior amendments. Mr. Lotz’s employment agreement was further amended effective October 1, 2021 to reflect the voluntary relinquishment of his role as Chief Financial Officer of the Company and to reflect that he will remain involved in the strategic financial direction, strategies, plans and policies of the Company. Under Mr. Lotz’s employment agreement, as amended and restated, we may terminate Mr. Lotz’s employment at any time with prior written notice at least one year before the intended termination date. Mr. Lotz’s employment agreement entitles him to a base salary and an opportunity to earn a cash incentive bonus paid on a quarterly basis based upon achievement of certain benchmarks mutually agreed upon by our Board and Mr. Lotz. Mr. Lotz is also entitled to receive an annual equity award pursuant to the terms of our then-existing equity incentive plan, as determined by our Board or our Compensation Committee, in its sole discretion, provided that such award shall have a grant date value of not less than $633,600 for any fiscal year following the fiscal year ended September 30, 2016. Mr. Lotz’s employment agreement entitles him to participate in all employee benefit plans and arrangements available to our executive officers, including the flight benefits discussed above. It also contains certain confidential information covenants prohibiting Mr. Lotz from using or disclosing any of our confidential information, other than as required in the performance of his duties as our President, during the term of his employment and for two years thereafter.

Mr. Lotz’s employment agreement also provides him with severance in the event his employment is terminated without Cause (as defined below) by us (or, in certain circumstances, by our successor-in-interest) or if he resigns for Good Reason (as defined below). If Mr. Lotz’s employment is terminated by us without Cause or if he resigns with Good Reason, he is entitled to payment equal to two times the sum of his base salary, plus the greater of (i) his target annual performance bonus or (ii) half the sum of the bonuses (incentive or otherwise) earned by Mr. Lotz with respect to the two fiscal years immediately preceding the year in which his resignation occurs. If Mr. Lotz is terminated by us or our successor-in-interest without Cause or he resigns for Good Reason within 12 months following a Change of Control (as defined below), Mr. Lotz is entitled to payment equal to three times the sum of his base salary, plus the greater of (i) his target performance bonus for the fiscal year in which the termination occurs or (ii) the highest amount of the bonuses (incentive or otherwise) paid to Mr. Lotz with respect to the three fiscal years immediately preceding the year in which his termination occurs. Upon Mr. Lotz’s termination without Cause or resignation for Good Reason, he is also entitled to the payment of continued health, dental and vision insurance premiums for himself and any covered dependents for 24 months following termination, and he is entitled to immediate vesting of any unvested equity awards.

For purposes of Mr. Lotz’s employment agreement, “Cause,” “Change of Control” and “Good Reason” have identical meanings to those contained in Mr. Ornstein’s employment agreement, as set forth above.

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Brian S. Gillman

We entered into an employment agreement with Mr. Gillman on April 23, 2014, effective as of September 3, 2013, to serve as our Executive Vice President, General Counsel and Secretary, which agreement was amended effective as of June 1, 2016, and again on July 26, 2018, to consolidate the prior amendments. Under Mr. Gillman’s employment agreement, as amended and restated, we may terminate Mr. Gillman’s employment at any time with prior written notice at least one year before the intended termination date. Mr. Gillman’s employment agreement entitles him to a base salary and an opportunity to earn a cash incentive bonus paid on a quarterly basis based upon achievement of certain benchmarks identical to those in Mr. Lotz’s and Mr. Ornstein’s employment agreements. Mr. Gillman is also entitled to receive an annual equity award pursuant to the terms of our then-existing equity incentive plan, as determined by our Board or our Compensation Committee, in its sole discretion, provided that, effective July 15, 2019, such award shall have a grant date value of not less than $200,000 for any fiscal year. Mr. Gillman’s employment agreement entitles him to participate in all employee benefit plans and arrangements available to our executive officers, including the flight benefits discussed above. It also contains certain confidential information covenants prohibiting Mr. Gillman from using or disclosing any of our confidential information, other than as required in the performance of his duties as our Executive Vice President, General Counsel and Secretary, during the term of his employment and for two years thereafter.

Mr. Gillman’s employment agreement also provides him with severance in the event his employment is terminated without Cause (as defined below) by us (or, in certain circumstances, by our successor-in-interest) or if he resigns for Good Reason (as defined below). If Mr. Gillman is terminated without Cause or if he resigns with Good Reason, he is entitled to payment equal to two times the sum of his base salary, plus an amount equal to the greater of (i) his target annual performance bonus or (ii) half the sum of the bonuses (incentive or otherwise) earned by Mr. Gillman with respect to the two fiscal years immediately preceding the year in which his termination occurs. If Mr. Gillman is terminated by us or our successor-in-interest without Cause or he resigns with Good Reason within 12 months following a Change of Control (as defined below), he is entitled to payment equal to three times the sum of his base salary, plus the greater of (i) his maximum target performance bonus for the fiscal year in which the termination occurs or (ii) the amount of all bonuses (incentive or otherwise) paid to Mr. Gillman with respect to the three fiscal years immediately preceding the year in which his termination occurs. Upon Mr. Gillman’s termination without Cause or resignation for Good Reason, he is also entitled to the payment of continued health, dental and vision insurance premiums for himself and any covered dependents for 24 months following termination, and he is entitled to immediate vesting of any unvested equity awards.

For purposes of Mr. Gillman’s employment agreement, “Cause,” “Change of Control” and “Good Reason” have identical meanings to those contained in Mr. Ornstein’s employment agreement, as set forth above.

Bradford R. Rich

Mr. Rich serves as our Chief Operating Officer. Under the terms of Mr. Rich’s offer letter, he receives an annual base salary of $300,000 and is eligible to receive an annual performance-based incentive cash bonus of up to $500,000 upon the achievement of established financial and operational goals. Mr. Rich is also eligible to receive an annual equity award under the Company’s 2018 Plan, as determined by our Board or our Compensation Committee, provided such award shall have a grant date value of not less than $200,000 in any fiscal year.

Mr. Rich is eligible to participate in the Company’s 401(k) tax-deferred retirement savings plan on the same terms as the Company’s other executive officers and fulltime employees. He is eligible for other

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benefits and perquisites, such as (i) medical, dental and vision insurance, (ii) life insurance, accidental death and dismemberment and business travel and accident insurance, (iii) health and dependent care flexible spending accounts, (iv) short and long-term disability insurance and (v) other non-cash fringe benefits on the same basis as the Company’s other executive officers.

Torque Zubeck

We entered into an employment agreement with Mr. Zubeck, effective March 1, 2021, in connection with his appointment as Senior Vice President of Finance of the Company. Under the terms of his employment agreement, upon his promotion to Chief Financial Officer, which was effective October 1, 2021, Mr. Zubeck (i) receives an annual base salary of $300,000, (ii) is eligible to receive an annual performance-based incentive cash bonus of up to $225,000 upon the achievement of established individual and company operational goals, and (iii) is eligible to receive an annual equity award under the Company’s 2018 Plan, as determined by our Board or our Compensation Committee, provided such award shall have a grant date value of not less than $150,000 in any fiscal year.

Mr. Zubeck is also be entitled (i) to participate in all employee benefit and welfare programs, plans and arrangements (including, without limitation, pension, profit sharing, supplemental pension and other retirement plans, insurance, hospitalization, medical and group disability benefits, travel or accident insurance plans) , and (ii) to receive fringe benefits, such as dues and fees of professional organizations and associations, in each case to the extent that such programs, plans, arrangements, and benefits are from time to time available to the Company’s executive personnel.

Mr. Zubeck’s employment agreement also provides him with severance in the event his employment is terminated without Cause (as defined in the employment agreement) by us or if he resigns for Good Reason (as defined in his employment agreement). If Mr. Zubeck is terminated without Cause or if he resigns with Good Reason, he is entitled to a payment equal to the sum of his then-existing base salary, plus an amount equal to his annual bonus amount which has been earned but has not been paid. If Mr. Zubeck is terminated by us or our successor-in-interest without Cause or he resigns with Good Reason within 12 months following a Change of Control (as defined in the employment agreement), he is entitled to a payment equal to the sum of his then-existing base salary, plus an amount equal to his annual bonus. Upon Mr. Zubeck’s termination without Cause or resignation for Good Reason, he is also entitled to the payment of continued health insurance coverage for himself and any covered dependents for 12 months following termination, subject to certain exceptions, and is entitled to immediate vesting of any unvested equity awards.

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Outstanding Equity Awards as of September 30, 2022

The following table presents information regarding all outstanding equity awards held by our NEOs as of September 30, 2022. Some values in the table have not been, and may never be, realized. The restricted common stock unit awards are subject to forfeiture, and their value, if any, will depend on the price and the date on which each NEO set forth below sells those shares once the restriction is removed.

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Equity Compensation Plan Information

The following table summarizes information about our equity compensation plans as of September 30, 2022. All outstanding awards relate to our common stock.

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Transactions With Related Persons in 2022

Related Party Transaction Policy

Our Board has a written policy and procedures for review and approval of transactions involving the Company and “related persons” (which includes our directors and executive officers or their immediate family members, or shareholders and their immediate family members owning 5% or more of our common stock). The policy applies to any transaction in which the Company is a participant and any related person that has a direct or indirect material interest, excluding transactions: (a) involving payment or reimbursement of expenses of the related person incurred in the ordinary course of the related person’s service as a director or officer of the Company; (b) where the financial or compensatory arrangements are approved or ratified by our Board; (c) where the related person’s interest arises (i) only from such person’s position as a director of a corporation or organization which is a party to the transaction; (ii) only from such person’s direct or indirect ownership of less than a 10% equity interest in another person (other than a partnership, limited liability company, trust or similar entity) that is a party to the transaction; or (iii) from both such position and such ownership; (d) where the related person’s interest arises only from the ownership of a class of equity securities of the Company and all holders of that class receive the same benefits on a pro rata basis; and (e) where an immediate family member’s interest arises from his or her status as an employee of a firm, corporation or other entity for which he or she is not also an officer, director, general partner, or principal.

Our Audit Committee reviews and approves in advance all related person transactions. In determining whether to approve a related person transaction, our Audit Committee looks to whether the related person transaction is on terms and conditions no less favorable to the Company than may reasonably be expected in arm’s-length transactions with unrelated parties. Our Audit Committee will also consider such other factors as it may determine under the circumstances of a particular transaction.

Our Audit Committee is responsible for reviewing the material facts of all related person transactions, subject to the exceptions described above. Our Audit Committee will either approve or disapprove the entry into the related person transaction. If advance approval is not feasible, the transaction will be considered and, if our Audit Committee determines it to be appropriate, ratified at our Audit Committee’s next regularly scheduled meeting. In determining whether to approve or ratify a transaction with a related person, our Audit Committee will take into account, among other factors that it determines to be appropriate, whether the transaction is on terms no less favorable than terms generally available to an unaffiliated third party under the same or similar circumstances and the extent of the related person’s interest in the transaction. Information relating to our transactions with related persons is set forth immediately below.

Since the beginning of our fiscal year ended September 30, 2022, we had no transactions pursuant to which we were a participant in which the amount involved exceeded or will exceed $120,000, and in which any of our directors, executive officers or holders of more than 5% of our capital stock, or any member of the immediate family of the foregoing persons, had or will have a direct or indirect material interest.

Indemnification Agreements

Our Second Amended and Restated Articles of Incorporation compel indemnification of our directors and officers and permit indemnification of our employees and other agents, in each case to the maximum extent permitted by Nevada law, and our Second Amended and Restated Bylaws provide for indemnification of our directors, officers, employees and other agents to the maximum extent permitted by Nevada law. In addition, we have entered into indemnification agreements with our directors and NEOs containing provisions which are in some respects broader than the specific indemnification provisions contained in Nevada law. The indemnification agreements may require us, among other things, to indemnify our directors and officers against certain liabilities that may arise by reason of their status or service as directors and officers and to advance their expenses incurred as a result of any proceeding against them as to which they could be indemnified.

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Other Matters

As of the date of this Proxy Statement, our Board knows of no other business that will be conducted at our Annual Meeting other than as described in this Proxy Statement. If any other matter or matters are properly brought before the meeting or any adjournment or postponement of the meeting, it is the intention of the persons named in the accompanying proxy to vote the proxy on such matters in accordance with their best judgment.

We have filed our Annual Report on Form 10-K for the fiscal year ended September 30, 2022 with the SEC. It is available free of charge at the SEC’s web site at www.sec.gov. Shareholders can also access this Proxy Statement and our Annual Report on Form 10-K in the “Financial Information – SEC Filings” section of our investor relations website (http://investor.mesa-air.com). We will provide, free of charge, a copy of any of our corporate documents listed above upon written request to our Executive Vice President, General Counsel and Secretary at 410 North 44th Street, Suite 700, Phoenix, Arizona 85008.

By Order of the Board of Directors

Jonathan G. Ornstein

Chairman, Chief Executive Officer and Director

Phoenix, Arizona

January 11, 2023

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SCAN TO VIEW MATERIALS & VOTE VOTE BY INTERNET—www.proxyvote.com or scan the QR Barcode above MESA AIR GROUP, INC. Use the Internet to transmit your voting instructions and for electronic delivery of ATTN: BRIAN S. GILLMAN information. Vote by 11:59 p.m. Eastern Time on February 22, 2023. Have your proxy 410 N. 44TH STREET-STE 700 PHOENIX, AZ 85008 card in hand when you access the website and follow the instructions to obtain your records and to create an electronic voting instruction form. VOTE BY PHONE—1-800-690-6903 Use any touch-tone telephone to transmit your voting instructions. Vote by 11:59 p.m. Eastern Time on February 22, 2023. Have your proxy card in hand when you call and then follow the instructions. VOTE BY MAIL Mark, sign and date your proxy card and return it in the postage-paid envelope we have provided or return it to Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, NY 11717. TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS: KEEP THIS PORTION FOR YOUR RECORDS DETACH AND RETURN THIS PORTION ONLY THIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED. For Withhold For All To withhold authority to vote for any All All Except individual nominee(s), mark “For All Except” and write the number(s) of the The Board of Directors recommends you vote FOR the following: nominee(s) on the line below. 0 0 0 1. Election of Directors Nominees 01) Ellen N. Artist 02) Mitchell I. Gordon 03) Dana J. Lockhart 04) Daniel J. McHugh 05) Jonathan G. Ornstein 06) Harvey W. Schiller 07) Spyridon P. Skiados The Board of Directors recommends you vote FOR the following proposal: For Against Abstain 2. The ratification of the appointment of Ernst & Young LLP as our independent registered public accounting firm 0 0 0 for the fiscal year ending September 30, 2023. NOTE: Such other business as may properly come before the meeting or any adjournment thereof. . 3 . 0 . 0 R1 1 _ Please sign exactly as your name(s) appear(s) hereon. When signing as attorney, executor, administrator, or other fiduciary, please give full title as such. Joint owners should each sign personally. All holders must sign. If a corporation or partnership, please sign in full corporate or 0000586708 partnership name by authorized officer. Signature [PLEASE SIGN WITHIN BOX] Date Signature (Joint Owners) Date

Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting: The Notice and Proxy Statement and Form 10-K are available at www.proxyvote.com MESA AIR GROUP, INC. 2023 Annual Meeting of Shareholders February 23, 2023 2:00 PM This proxy is solicited by the Board of Directors The shareholder(s) hereby appoint(s) Brian S. Gillman and Michael J. Lotz, or either of them, as proxies, each with the power to appoint his substitute, and hereby authorize(s) them to represent and to vote, as designated on the reverse side of this ballot, all of the shares of common stock of MESA AIR GROUP, INC. that the shareholder(s) is/are entitled to vote at the 2023 Annual Meeting of Shareholders to be held at 2:00 PM, MST on Thursday, February 23, 2023, at Phoenix Airport Marriott, 1101 N. 44th Street, Phoenix, AZ 85008, and any adjournment or postponement thereof. This proxy, when properly executed, will be voted in the manner directed herein. If no such direction is made, this proxy will be voted in accordance with the Board of Directors’ recommendations. . 3 . 0 . 0 R1 _ 2 0000586708 Continued and to be signed on reverse side