EX-10.40





 Exhibit 10.40 

January 15, 2021 
 Frontier
Airlines, Inc. 
 4545 Airport Way 

Denver, CO 80239 
 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: 
 ““PSP2 Warrant
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. 

[Remainder of this page intentionally left blank.] 












 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/ James Dempsey

		 	 Name: James Dempsey

		 	 Title:   Chief Financial Officer

	
	 FRONTIER GROUP HOLDINGS, INC.

		
	By:	 	 /s/ James Dempsey

		 	 Name: James Dempsey

		 	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/ Brent McIntosh

		 	Name: Brent McIntosh
		 	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/ Bret S. Derman

		 	Name: Bret S. Derman
		 	Title:   Vice President
	
	THE BANK OF NEW YORK MELLON, as Collateral Agent
		
	By:	 	 /s/ Bret S. Derman

		 	Name: Bret S. Derman
		 	Title:   Vice President


  
 [Signature Page to Letter
Agreement – Frontier Airlines]