Document:

EX-10.16(x)

 [***] Certain information in this document has been excluded pursuant to Regulation S-K, Item 601(b)(10). 
 Such excluded information is not material and would likely cause competitive harm to the
registrant if publicly disclosed. 
 Exhibit 10.16(x) 

AMENDMENT NO. 8 
 to 

A320 Family Aircraft Purchase Agreement 

dated as of September 30, 2011 

between 
 AIRBUS S.A.S.

 and 
 FRONTIER
AIRLINES, INC. 
 This Amendment No. 8 (hereinafter referred to as this “Amendment”) is entered into as of March 16, 2020
between Airbus S.A.S. a société par actions simplifiée, created and existing under the laws of the Republic of France, having its registered office at 2 Rond-Point Emile Dewoitine, 31700 Blagnac, France and registered
with Toulouse Registre du Commerce under number RCS Toulouse 383 474 814 (the “Seller”) and Frontier Airlines, Inc., a corporation organized and existing under the laws of the State of Colorado, United States of America, having its
principal corporate offices located at 4545 Airport Way, Denver, Colorado 80239 USA, (the “Buyer” and, together with the Seller, the “Parties”). 

WHEREAS, the Buyer and the Seller entered into that certain A320 Family Aircraft Purchase Agreement dated as of September 30, 2011 (as amended,
supplemented and modified from time to time prior to the date hereof, the “Agreement”). 
 [***] 

WHEREAS, the Parties wish to amend the Agreement as set forth below. 

NOW THEREFORE, SUBJECT TO THE TERMS AND CONDITIONS SET FORTH HEREIN, IT IS AGREED AS FOLLOWS: 

Capitalized terms used herein and not otherwise defined in this Amendment will have the meanings assigned to them in the Agreement. Except as used within
quoted text, the terms “herein”, “hereof”, and “hereunder” and words of similar import refer to this Amendment. 

  
 Page 1/8 

PRIVILEDGED AND CONFIDENTIAL 

	1.	 [***] 

  

	1.1	 Without prejudice to the Agreement and subject to Paragraph 3 below, in respect of the [***]

  

	1.2	 The following Aircraft shall be [***]: 

 

									
	Aircraft Type	  	 Contractual

Rank
	  	CAC ID	  	 Scheduled

Delivery Month
	  	 Anticipated

Actual Delivery

	[***]	  	[***]	  	[***]	  	[***]	  	[***]

  

	1.3	 With respect to the [***] 

 

	1.4	 [***] 

  

	2.	 DELIVERIES 

  

	2.1	 Aircraft [***] 

  

	 	(a)	 The Scheduled Delivery Month of [***] Aircraft shall be amended as follows: 

 

									
	Aircraft Type	  	 Contractual

Rank
	  	CAC ID	  	Original Scheduled Delivery Month	  	
New Scheduled
 Delivery
Month

	[***]	  	[***]	  	[***]	  	[***]	  	[***]
	[***]	  	[***]	  	[***]	  	[***]	  	[***]

  

	 	(b)	 The delivery schedule table set forth in Clause 9.1 of the Agreement is deleted in its entirety and replaced
with the delivery schedule table attached hereto as Appendix A. 

  
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PRIVILEDGED AND CONFIDENTIAL 

	3.	 [***] 

It is expressly understood and agreed by the Parties, as a condition hereof, that 

(a) 
  

	 	(i)	 [***], 

  

	 	(ii)	 [***], and 

  

	 	(iii)	 [***], 

[***]; and 
  

	 	(b)	 [***] 

  

	4.	 EFFECT OF THE AMENDMENT 

The Agreement will be deemed amended to the extent herein provided, and, except as specifically amended hereby, will continue in full force and
effect in accordance with its original terms. This Amendment contains the entire agreement between the Buyer and the Seller with respect to the subject matter hereof and supersedes any previous understandings, commitments, or representations
whatsoever, whether oral or written, related to the subject matter of this Amendment. 
 Both parties agree that this Amendment will
constitute an integral, nonseverable part of the Agreement and will be governed by its provisions, except that if the Agreement and this Amendment have specific provisions that are inconsistent, the specific provisions contained in this Amendment
will govern. 
 This Amendment terminates at midnight (Mountain Daylight Time) on March 16 2020 [***] 

 

	5.	 CONFIDENTIALITY 

This Amendment is subject to the confidentiality provisions set forth in Clause 22.11 of the Agreement. 

 

	6.	 ASSIGNMENT 

Notwithstanding any other provision of this Amendment or of the Agreement, this Amendment will not be assigned or transferred in any manner
without the prior written consent of the other party, and any attempted assignment or transfer in contravention of the provisions of this Clause 6 will be void and of no force or effect. 

 

	7.	 COUNTERPARTS 

This Amendment may be executed by the parties hereto in separate counterparts, each of which when so executed and delivered shall be an
original, but all such counterparts shall together constitute one and the same instrument. 

  
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PRIVILEDGED AND CONFIDENTIAL 

	8.	 INTERPRETATION AND LAW 

This Amendment is subject to the Interpretation and Law provisions set forth in Clause 22.6 of the Agreement. 

[SIGNATURE PAGE FOLLOWS] 

  
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PRIVILEDGED AND CONFIDENTIAL 

 IN WITNESS WHEREOF, the parties hereto have entered into this Amendment by their respective officers or
agents as of the date first above written. 
  

			
	Airbus S.A.S.
		
	By:	 	/s/ Benoît de Saint-Exupéry
		 	Name: Benoît de Saint-Exupéry
		 	Title: Senior Vice President, Contracts

  

			
	Frontier Airlines, Inc.
		
	By:	 	/s/ James Dempsey
		 	Name: James Dempsey
		 	Title: Chief Financial Officer

  
 PRIVILEDGED AND
CONFIDENTIAL 

 Appendix A to Amendment No. 8 

  
 Page 6/8 

			
	 Appendix B to Amendment No. 8
	  	CONFIDENTIAL

 LETTER AGREEMENT 

[***] 

  
 Page 7/8 

			
	 Appendix B to Amendment No. 8
	  	CONFIDENTIAL

 APPENDIX 1 

[***] 
 For 

2020 Aircraft 
 [***] 

  
 Page 8/8EX-10.16(y)

 [***] Certain information in this document has been excluded pursuant to Regulation S-K, Item 601(b)(10). 
 Such excluded information is not material and would likely cause competitive harm to the
registrant if publicly disclosed. 
 Exhibit 10.16(y) 

AMENDMENT NO. 9 
 to 

A320 Family Aircraft Purchase Agreement 

dated as of September 30, 2011 

between 
 Airbus S.A.S. 

and 
 Frontier Airlines, Inc. 

  
 1 

Confidential 

 Amendment No. 9 

This Amendment No. 9 (this “Amendment”) is entered into as of May 4, 2020, between Airbus S.A.S., a société par
actions simplifiée organized and existing under the laws of France, having its registered office located at 2, Rond-Point Emile Dewoitine, 31700 Blagnac, France (the “Seller”), and Frontier Airlines, Inc., a corporation
organized and existing under the laws of the State of Colorado, United States of America, having its principal corporate offices located at 4545 Airport Way, Denver, Colorado 80239 USA (the “Buyer” and, together with the Seller, the
“Parties”). 
 WITNESSETH 

WHEREAS, the Buyer and the Seller entered into an A320 Family Aircraft Purchase Agreement dated as of September 30, 2011 (as amended, supplemented and
modified from time to time prior to the date hereof, the “Agreement”); and 
 WHEREAS, [***] and 

WHEREAS, the Buyer and the Seller wish to amend certain terms of the Agreement as provided herein. 

NOW, THEREFORE, FOR GOOD AND VALUABLE CONSIDERATION, THE RECEIPT AND SUFFICIENCY OF WHICH ARE HEREBY ACKNOWLEDGED, THE SELLER AND THE BUYER AGREE AS FOLLOWS:

 Capitalized terms used herein and not otherwise defined herein will have the meanings assigned to them in the Agreement. The terms “herein,”
“hereof” and “hereunder” and words of similar import refer to this Amendment. 

  
 2 

Confidential 

	1.	 DELIVERY SCHEDULE 

The delivery schedule table set forth in Clause 9.1 of the Agreement is deleted in its entirety and replaced with the delivery schedule table
attached hereto as Appendix A. 
  

	2.	 PREDELIVERY PAYMENTS 

 

	2.1	 Clause 5.3.2(b) of the Agreement is hereby amended by adding the parenthetical [***] 

 

	2.2	 Clause 5.3.2(c) of the Agreement is hereby amended by [***]. 

 

	2.3	 Solely with respect to Aircraft [***] as a result of the changes made to the Agreement pursuant to Paragraphs
1, 2.1 and 2.2 of this Amendment and in accordance with Clause 5.3.3 of the Agreement, [***] 

  

	3.	 DEFINITION CLAUSE, [***] AND OTHER MATTERS 

 

	3.1	 Clause 0 of the Agreement is hereby amended by replacing [***] which shall be added in its alphabetical order.

  

	3.2	 Paragraph 9 of Amendment No. 7 to the Agreement is hereby amended by replacing [***].

  

	3.3	 [***] 

  

	3.4	 [***] 

  
 3 

Confidential 

	4.	 [***] 

  

	4.1	 [***]. 

  

	4.2	 [***]. 

  

	4.3	 [***] 

  

	5.	 EFFECT OF AMENDMENT 

The Agreement will be deemed amended to the extent herein provided, and, except as specifically amended hereby, will continue in full force and
effect in accordance with its original terms. This Amendment contains the entire agreement between the Buyer and the Seller with respect to the subject matter hereof and supersedes any previous understandings, commitments, or representations
whatsoever, whether oral or written, related to the subject matter of this Amendment. 
 Both parties agree that this Amendment will
constitute an integral, non-severable part of the Agreement and will be governed by its provisions, except that if the Agreement and this Amendment have specific provisions that are inconsistent, the specific
provisions contained in this Amendment will govern. 
  

	6.	 MISCELLANEOUS 

This Amendment is subject to the provisions of Clauses 21, 22.6 and 22.11 of the Agreement. 

 

	7.	 COUNTERPARTS 

This Amendment may be signed by the Parties in counterparts, which when signed and delivered will each be an original and together constitute
but one and the same instrument. Counterparts may be delivered in original, faxed or emailed form, with originals to be delivered in due course. 

  
 4 

Confidential 

 IN WITNESS WHEREOF, the Parties have caused this Amendment to be signed by their respective duly authorized
officers or agents as of the day and year first above written. 
  

			
	Airbus S.A.S.
		
	By:	 	/s/ Benôit de Saint-Exupéry
		 	Name: Benôit de Saint-Exupéry
		 	Title: Senior Vice President, Contracts

  

			
	Frontier Airlines, Inc.
		
	By:	 	/s/ Howard Diamond
		 	Name: Howard Diamond
		 	Title: General Counsel

  
 5 

Confidential 

 Appendix A to Amendment No. 9 

Delivery Schedule Table 

  
 6 

Confidential

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