Exhibit 10.35

LETTER AGREEMENT NO. 8

As of March 5, 2010

United
Air Lines, Inc.

77 West Wacker Drive

Chicago, Illinois 60601

Re: A350-900XWB
 [CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT]

Dear
Ladies and Gentlemen,

United Air Lines, Inc. (the Buyer), and AIRBUS S.A.S. (the Seller), have entered
into an Airbus A350-900XWB Purchase Agreement dated as of even date herewith (the Agreement), which covers, among other things, the sale by the Seller and the purchase by the Buyer of certain Aircraft, under the terms and
conditions set forth in said Agreement. The Buyer and the Seller have agreed to set forth in this Letter Agreement No. 8 (the Letter Agreement) certain additional terms and conditions regarding the sale of the Aircraft.
Capitalized terms used herein and not otherwise defined in this Letter Agreement will have the meanings assigned thereto in the Agreement. The terms herein, hereof and hereunder and words of similar import refer
to this Letter Agreement.

Both parties agree that this Letter Agreement will constitute an integral, nonseverable part of said Agreement,
that the provisions of said Agreement are hereby incorporated herein by reference, and that this Letter Agreement will be governed by the provisions of said Agreement, except that if the Agreement and this Letter Agreement have specific provisions
which are inconsistent, the specific provisions contained in this Letter Agreement will govern.

AIRBUS S.A.S. &
UNITED AIR LINES, INC.  PROPRIETARY AND CONFIDENTIAL



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|1. | INTRODUCTION
|-- | ------------

[CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT]



|2 | [CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT]
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|2.1 | [CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT]
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|3 | BUYERS OBLIGATIONS
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|3.1 | The [CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] will be contingent upon the fulfilment by
the Buyer of the following obligations:
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[CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC
PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT]

Any failure by the Buyer to comply with the obligations set forth in
Paragraph 3.1 will result in the [CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] with respect to which such obligations are not met from the [CONFIDENTIAL
MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT], for the period of time during which such obligations are not met.

[CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT]



|4 | [CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT]
|- | ------------------------------------------------------------------------------------------------------------------



AIRBUS S.A.S. & UNITED AIR LINES, INC.  PROPRIETARY AND CONFIDENTIAL



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|5 | CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT]
|- | -----------------------------------------------------------------------------------------------------------------



|6 | REMEDIES - RECONCILIATION
|- | -------------------------

[CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT]



| | 1. | The Buyer and the Seller will jointly investigate the cause(s) of [CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC PURSUANT TO A REQUEST FOR
CONFIDENTIAL TREATMENT]with the Buyer providing all pertinent information, data and records.
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 2. | Provided that all conditions contained in this Letter Agreement are satisfied, at the end of the Term, the Seller will [CONFIDENTIAL MATERIAL OMITTED AND FILED
SEPARATELY WITH THE SEC PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT]
| | -- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 3. | The Seller will make reasonable efforts to provide any [CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC PURSUANT TO A REQUEST FOR CONFIDENTIAL
TREATMENT]
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|7 | TERMINATION
|- | -----------

[CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT]



|8 | COST ALLOCATION
|- | ---------------

[CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT]



|9 | [CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT]
|- | ------------------------------------------------------------------------------------------------------------------



|10 | [CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT]
|-- | ------------------------------------------------------------------------------------------------------------------



AIRBUS S.A.S. & UNITED AIR LINES, INC.  PROPRIETARY AND CONFIDENTIAL



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|11 | ASSIGNMENT
|-- | ----------

This Letter
Agreement and the rights and obligations of the parties will be subject to the provisions of Clause 21 of the Agreement.



|12 | CONFIDENTIALITY
|-- | ---------------

This
Letter Agreement and the rights and obligations of the parties will be subject to the provisions of Clause 22.10 of the Agreement.



|13 | COUNTERPARTS
|-- | ------------

This Letter
Agreement 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.



AIRBUS S.A.S. & UNITED AIR LINES, INC.  PROPRIETARY AND CONFIDENTIAL



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If the foregoing correctly sets forth our understanding, please execute the original and one (1) copy
hereof in the space provided below and return a copy to the Seller.



Very truly yours,AIRBUS S.A.S.By:

/s/ John J. LeahyIts:

Chief Operating OfficerCustomers




| |  |                        |  |                             
| |  | ---------------------- |  | ----------------------------
| |  | Accepted and Agreed   
| | 
| |  | UNITED AIR LINES, INC.
| |  |                       
| |  | By:                    |  | /s/ Kathryn A. Mikells      
| |  |                       
| |  | Its:                   |  | Executive Vice President and
| |  |                        |  | Chief Financial Officer     



|                                                        |  |                       
|------------------------------------------------------- |  | ----------------------
|United Air Lines, Inc.  A350-900XWB Purchase Agreement |  | Letter Agreement No. 8



AIRBUS S.A.S. & UNITED AIR LINES, INC.  PROPRIETARY AND CONFIDENTIAL



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APPENDIX A  A350-900XWB DELIVERY SCHEDULE

[CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT]



AIRBUS S.A.S. & UNITED AIR LINES, INC.  PROPRIETARY AND CONFIDENTIAL



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APPENDIX B  AIRFRAME MAINTENANCE PRACTICES

[CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT]



AIRBUS S.A.S. & UNITED AIR LINES, INC.  PROPRIETARY AND CONFIDENTIAL



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APPENDIX C  [CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SEC PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT]



AIRBUS S.A.S. & UNITED AIR LINES, INC.  PROPRIETARY AND CONFIDENTIAL