Frontier Airlines, Inc. Denver, CO 80239 Re: Amendments to Loan and Guarantee Agreement

Exhibit 10.40

January 15, 2021

Frontier Airlines, Inc.

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Re: Amendments to Loan and Guarantee Agreement

Reference is made to that certain Loan and Guarantee Agreement, dated as of September 28, 2020 (the “Existing Loan and Guarantee Agreement”, and as amended hereby and as may be further amended, supplemented and restated or otherwise modified from time to time, the “Loan and Guarantee Agreement”), among Frontier Airlines, Inc., a corporation organized under the laws of Colorado (the “Borrower”), Frontier Group Holdings, Inc., a corporation organized under the laws of Delaware (the “Parent”), the United States Department of the Treasury (“Treasury”) and The Bank of New York Mellon as Administrative Agent and Collateral Agent. Capitalized terms used herein but not otherwise defined shall have the meanings ascribed to such terms in the Loan and Guarantee Agreement.

WHEREAS, Pursuant to Section 11.02 of the Loan and Guarantee Agreement, the Borrower has requested amendments to the Existing Loan and Guarantee Agreement as set forth herein; and

WHEREAS, Treasury, as the Initial Lender and constituting the Required Lenders, has agreed to amend the Existing Loan and Guarantee Agreement as set forth herein.

NOW, THEREFORE, in consideration of the mutual promises contained herein and other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the parties hereto agree as follows:

1. Effective as of the date hereof, Section 1.01 of the Existing Loan and Guarantee Agreement is hereby amended by inserting the following definition, in alphabetical order:

““▇▇▇▇ ▇▇▇▇▇▇▇ Agreement” means that certain warrant agreement, dated as of January 15, 2021 between Parent and Treasury.”

2. Effective as of the date hereof, the definition of “Warrants” in Section 1.01 of the Existing Loan and Guarantee Agreement is hereby amended and restated in its entirety as follows:

““Warrants” means, collectively, those certain warrants issued to Treasury under the Warrant Agreement, the PSP Warrant Agreement or the PSP2 Warrant Agreement.”

3. Effective as of the date hereof, Section 2.07 of the Existing Loan and Guarantee Agreement is hereby amended by deleting the reference to “March 26, 2021” and replacing it with “May 28, 2021”.

4. This letter agreement shall be limited as written and nothing herein shall be deemed to constitute an amendment or waiver of any other term, provision or condition of the Loan and Guarantee Agreement or any of the other Loan Documents in any other instance than as expressly set forth herein or prejudice any right or remedy that any Lender, the Administrative Agent or the Collateral Agent may now have or may in the future have under the Loan and Guarantee Agreement or any of the other Loan Documents. For the avoidance of doubt, this letter agreement is hereby deemed to be a Loan Document under the Loan and Guarantee Agreement. Except as herein provided, the Loan and Guarantee Agreement and the other Loan Documents shall remain unchanged and in full force and effect. This letter agreement shall not constitute a novation of the Loan and Guarantee Agreement or any other Loan Documents.

5. The Agents assume no responsibility for, and shall be entitled to rely on, without any obligation to ascertain or investigate, the correctness of the recitals and statements contained herein. The Agents shall not be liable or responsible in any manner whatsoever for, or in respect of, the validity or sufficiency of the amendments contained in this letter agreement.

6. Sections 11.06(b) (Electronic Execution), 11.09 (Governing Law; Jurisdiction; Etc.) and 11.10 (Waiver of Jury Trial) of the Loan and Guarantee Agreement shall apply mutatis mutandis to this letter agreement as if set out herein.

7. This letter agreement may be executed in counterparts (and by different parties hereto in different counterparts), each of which shall constitute an original, but all of which when taken together shall constitute a single contract. Delivery of an executed counterpart of a signature page of this letter agreement by facsimile or in electronic (e.g., “pdf” or “tif”) format shall be effective as delivery of a manually executed counterpart of this letter agreement.

The Lenders party hereto hereby authorize and direct the Administrative Agent and the Collateral Agent to acknowledge this letter agreement.

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IN WITNESS WHEREOF, the undersigned have caused this letter agreement to be duly executed by their duly authorized representatives, all as of the day and year first above written.

FRONTIER AIRLINES, INC.
By:		/s/ ▇▇▇▇▇ ▇▇▇▇▇▇▇
		Name: ▇▇▇▇▇ ▇▇▇▇▇▇▇
		Title:   Chief Financial Officer
FRONTIER GROUP HOLDINGS, INC.
By:		/s/ ▇▇▇▇▇ ▇▇▇▇▇▇▇
		Name: ▇▇▇▇▇ ▇▇▇▇▇▇▇
		Title:   Chief Financial Officer

[Signature Page to Letter Agreement – Frontier Airlines]

UNITED STATES DEPARTMENT OF THE TREASURY, as the Initial Lender and a Lender
By:		/s/ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇
		Name: ▇▇▇▇▇ ▇▇▇▇▇▇▇▇
		Title:   Under Secretary for International Affairs

[Signature Page to Letter Agreement – Frontier Airlines]

Acknowledged:

THE BANK OF NEW YORK MELLON, as Administrative Agent
By:		/s/ ▇▇▇▇ ▇. ▇▇▇▇▇▇
		Name: ▇▇▇▇ ▇. ▇▇▇▇▇▇
		Title:   Vice President
THE BANK OF NEW YORK MELLON, as Collateral Agent
By:		/s/ ▇▇▇▇ ▇. ▇▇▇▇▇▇
		Name: ▇▇▇▇ ▇. ▇▇▇▇▇▇
		Title:   Vice President

[Signature Page to Letter Agreement – Frontier Airlines]