Document:

Escrow and Paying Agent Agreement (Class A)

 Exhibit 4.16 
 ESCROW AND 
 PAYING AGENT AGREEMENT (CLASS A) 

 dated as of November 24, 2009 
 among 
 WILMINGTON TRUST COMPANY 
 as Escrow Agent 
 MORGAN STANLEY & CO. INCORPORATED, 
 J.P. MORGAN SECURITIES INC. 
 and  
 GOLDMAN, SACHS & CO. 
 as Representatives of the several Underwriters 
 WILMINGTON TRUST COMPANY, 
 not in its individual capacity, 
 but solely as Pass Through Trustee 
 for and on behalf of 
 United Air Lines Pass Through Trust 2009-2A-O 
 as Pass Through Trustee 
 and 
 WILMINGTON
TRUST COMPANY 
 as Paying Agent 

 TABLE OF CONTENTS 
  
  

					
	 	  	 	  	Page
	Section 1.    	  	 Escrow Agent
	  	  2
	1.01.	  	 Appointment of Escrow Agent
	  	2
	1.02.	  	 Instruction; Etc
	  	3
	1.03.	  	 Initial Escrow Amount; Issuance of Escrow Receipts
	  	3
	1.04.	  	 Payments to Receiptholders
	  	4
	1.05.	  	 Mutilated, Destroyed, Lost or Stolen Escrow Receipt
	  	4
	1.06.	  	 Additional Escrow Amounts
	  	5
	1.07.	  	 Resignation or Removal of Escrow Agent
	  	5
	1.08.	  	 Persons Deemed Owners
	  	5
	1.09.	  	 Further Assurances
	  	5
			
	Section 2.	  	 Paying Agent
	  	6
	2.01.	  	 Appointment of Paying Agent
	  	6
	2.02.	  	 Establishment of Paying Agent Account
	  	6
	2.03.	  	 Payments from Paying Agent Account
	  	6
	2.04.	  	 Withholding Taxes
	  	7
	2.05.	  	 Resignation or Removal of Paying Agent
	  	7
	2.06.	  	 Notice of Final Withdrawal
	  	7
			
	Section 3.	  	 Payments
	  	8
			
	Section 4.	  	 Other Actions
	  	8
			
	Section 5.	  	 Representations and Warranties of the Escrow Agent
	  	8
			
	Section 6.	  	 Representations and Warranties of the Paying Agent
	  	9
			
	Section 7.	  	 Indemnification
	  	10
			
	Section 8.	  	 Amendment, Etc
	  	11
			
	Section 9.	  	 Notices
	  	11
			
	Section 10.	  	 Transfer
	  	12
			
	Section 11.	  	 Entire Agreement
	  	12
			
	Section 12.	  	 Governing Law
	  	12
			
	Section 13.	  	 Waiver of Jury Trial Right
	  	12
			
	Section 14.	  	 Counterparts
	  	12
			
	Section 15.	  	 Rights of Holders
	  	12
			
	Exhibit A	  	Escrow Receipt	  	
	Exhibit B	  	Withdrawal Certificate	  	

  

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 ESCROW AND PAYING AGENT AGREEMENT (CLASS A) 
 ESCROW AND PAYING AGENT AGREEMENT (Class A) dated as of November 24, 2009 (as amended, modified or supplemented from time to
time, this “Agreement”) among WILMINGTON TRUST COMPANY, a Delaware banking corporation, as Escrow Agent (in such capacity, together with its successors in such capacity, the “Escrow Agent”); MORGAN
STANLEY & CO. INCORPORATED, J.P. MORGAN SECURITIES INC. and GOLDMAN, SACHS & CO., as representatives of the several Underwriters (the “Underwriters” and together with their respective transferees
and assigns as registered owners of the Certificates, the “Investors”) under the Underwriting Agreement referred to below; WILMINGTON TRUST COMPANY, a Delaware banking corporation, not in its individual capacity except as
otherwise expressly provided herein, but solely as trustee (in such capacity, together with its successors in such capacity, the “Pass Through Trustee”) under the Pass Through Trust Agreement referred to below; and WILMINGTON
TRUST COMPANY, a Delaware banking corporation, as paying agent hereunder (in such capacity, together with its successors in such capacity, the “Paying Agent”). 
 W I T N E S S E T H: 
 WHEREAS, United Air Lines, Inc. (“United”) and the Pass Through Trustee have entered into a Trust Supplement, dated as of November 24, 2009 (the “Trust
Supplement”) to the Pass Through Trust Agreement, dated as of June 26, 2007 (together, as amended, modified or supplemented from time to time in accordance with the terms thereof, the “Pass Through Trust Agreement”)
relating to United Air Lines Pass Through Trust 2009-2A-O (the “Pass Through Trust”) pursuant to which the United Air Lines Pass Through Trust, Series 2009-2A-O Certificates referred to therein (the “Certificates”)
are being issued (the date of such issuance, the “Issuance Date”); 
 WHEREAS, United and the
Underwriters have entered into an Underwriting Agreement dated November 16, 2009 (as amended, modified or supplemented from time to time in accordance with the terms thereof, the “Underwriting Agreement”) pursuant to which the
Pass Through Trustee will issue and sell the Certificates to the Underwriters (the net proceeds of such sale being herein referred to as the “Net Proceeds”); 
 WHEREAS, United, the Pass Through Trustee, certain other pass through trustees and certain other persons concurrently herewith are
entering into the Note Purchase Agreement, dated as of the date hereof (the “Note Purchase Agreement”), pursuant to which the Pass Through Trustee has agreed to acquire from time to time on or prior to the Deposit Period Termination
Date (as defined in the Note Purchase Agreement) equipment notes (the “Equipment Notes”) issued to finance certain aircraft currently owned by United utilizing a portion of the Net Proceeds; 
 WHEREAS, the Underwriters and the Pass Through Trustee intend that the Net Proceeds be held in escrow by the Escrow Agent on behalf
of the Investors, subject to withdrawal upon request by the Pass Through Trustee and satisfaction of the conditions set forth in the Note Purchase Agreement for the purpose of purchasing Equipment Notes, and that pending such withdrawal the Net
Proceeds be deposited on behalf of the Escrow Agent with JPMorgan Chase Bank, N.A., a national banking association, as 

 [Escrow and Paying Agent Agreement (Class A)] 
  
 Depositary (the “Depositary” which shall also be deemed to
refer to any Replacement Depositary (as defined in the Note Purchase Agreement) from and after the date on which the Deposits are transferred to such Replacement Depositary) under the Deposit Agreement, dated as of the date hereof between the
Depositary and the Escrow Agent relating to the Pass Through Trust (as amended, modified, supplemented or replaced from time to time in accordance with the terms thereof, the “Deposit Agreement” which shall also be deemed to refer
to any Replacement Deposit Agreement (as defined in the Note Purchase Agreement) to which the Escrow Agent becomes a party pursuant to Section 1.02(a) hereof from and after the transfer of the Deposits from the Depositary to the Replacement
Depositary) pursuant to which, among other things, the Depositary will pay interest for distribution to the Investors and establish accounts from which the Escrow Agent shall make withdrawals upon request of and proper certification by the Pass
Through Trustee; 
 WHEREAS, the Escrow Agent wishes to appoint the Paying Agent to pay amounts required to be
distributed to the Investors in accordance with this Agreement; and 
 WHEREAS, capitalized terms used but not defined
herein shall have the meanings ascribed to such terms in the Pass Through Trust Agreement. 
 NOW, THEREFORE, in
consideration of the obligations contained herein, and for other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the parties hereto hereby agree as follows: 
 Section 1. Escrow Agent. 
 1.01. Appointment of Escrow Agent. Each of the Underwriters, for and on behalf of each of the Investors, hereby irrevocably appoints, authorizes and directs the Escrow Agent to act as escrow agent
and fiduciary hereunder and under the Deposit Agreement for such specific purposes and with such powers as are specifically delegated to the Escrow Agent by the terms of this Agreement, together with such other powers as are reasonably incidental
thereto. Any and all money received and held by the Escrow Agent under this Agreement or the Deposit Agreement shall be held in escrow by the Escrow Agent in accordance with the terms of this Agreement. This Agreement is irrevocable and the
Investors’ rights with respect to any monies received and held in escrow by the Escrow Agent under this Agreement or the Deposit Agreement shall only be as provided under the terms and conditions of this Agreement and the Deposit Agreement. The
Escrow Agent (which term as used in this sentence shall include reference to its affiliates and its own and its affiliates’ officers, directors, employees and agents): (a) shall have no duties or responsibilities except those expressly set
forth in this Agreement; (b) shall not be responsible to the Pass Through Trustee or the Investors for any recitals, statements, representations or warranties of any person other than itself contained in this Agreement or the Deposit Agreement
or for the failure by the Pass Through Trustee, the Investors or any other person or entity (other than the Escrow Agent) to perform any of its obligations hereunder (whether or not the Escrow Agent shall have any knowledge thereof); and
(c) shall not be responsible for any action taken or omitted to be taken by it hereunder or provided for herein or in connection herewith, except for its own willful misconduct or gross negligence (or simple negligence in connection with the
handling of funds actually received by it in accordance with the terms of this Agreement) or breach of its obligations hereunder. 
  

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 [Escrow and Paying Agent Agreement (Class A)] 
  
 1.02. Instruction; Etc. The Underwriters, for and on
behalf of each of the Investors, hereby irrevocably instruct the Escrow Agent, and the Escrow Agent agrees, (a) to enter into the Deposit Agreement and, if requested by the Company pursuant to Section 4(a)(iii) of the Note Purchase
Agreement, to enter into a Replacement Deposit Agreement with the Replacement Depositary specified by the Company, (b) to appoint the Paying Agent as provided in this Agreement, (c) upon receipt at any time and from time to time prior to
the Termination Date (as defined below) of a certificate substantially in the form of Exhibit B hereto (a “Withdrawal Certificate”) executed by the Pass Through Trustee, together with an attached Notice of Financing Withdrawal
in substantially the form of Exhibit A to the Deposit Agreement duly completed by the Pass Through Trustee (the “Applicable Notice of Financing Withdrawal” and the withdrawal to which it relates, a “Financing
Withdrawal”), immediately to execute the Applicable Notice of Financing Withdrawal as Escrow Agent and transmit it to the Depositary by facsimile transmission in accordance with the Deposit Agreement; provided that, upon the request
of the Pass Through Trustee after such transmission, the Escrow Agent shall cancel such Applicable Notice of Financing Withdrawal, (d) upon receipt of a Withdrawal Certificate executed by the Pass Through Trustee, together with an attached
Notice of Replacement Withdrawal in substantially the form of Exhibit C to the Deposit Agreement duly completed by the Pass Through Trustee, to (X) give such Notice of Replacement Withdrawal to the Depositary requesting a withdrawal, on
the date specified in such notice, which shall not be less than Five Business Days after such notice is given (the “Replacement Withdrawal Date”), of all Deposits then held by the Depositary together with all accrued and unpaid
interest on such Deposits to but excluding the Replacement Withdrawal Date, and (Y) direct the Depositary to transfer such Deposits and accrued interest on behalf of the Escrow Agent to the Replacement Depositary in accordance with the
Replacement Deposit Agreement, and (e) if there are any undrawn Deposits (as defined in the Deposit Agreement) on the “Termination Date”, which shall mean the earlier of (i) the Deposit Period Termination Date (as defined
in the Note Purchase Agreement) and (ii) the day on which the Escrow Agent receives notice from the Pass Through Trustee that the Pass Through Trustee’s obligation to purchase Equipment Notes under the Note Purchase Agreement has
terminated, to immediately give notice to the Depositary (with a copy to the Paying Agent) substantially in the form of Exhibit B to the Deposit Agreement requesting a withdrawal of all of the remaining Deposits, together with accrued and
unpaid interest on such Deposits to the date of withdrawal, on the 15th day after the date that such notice of withdrawal is given to the Depositary (or, if not a Business Day, on the next succeeding Business Day) (a “Final
Withdrawal”), provided that if the day scheduled for the Final Withdrawal in accordance with the foregoing is within 10 days before or after a Regular Distribution Date, then the Escrow Agent shall request that such requested Final
Withdrawal be made on such Regular Distribution Date (the date of such requested withdrawal, the “Final Withdrawal Date”). If for any reason the Escrow Agent shall have failed to give the Final Withdrawal notice to the Depositary on
or before February 7, 2010, and there are unwithdrawn Deposits on such date, the Final Withdrawal Date shall be deemed to be February 14, 2010. 
 1.03. Initial Escrow Amount; Issuance of Escrow Receipts. The Escrow Agent hereby directs the Underwriters to, and the Underwriters hereby acknowledge that on the date hereof they shall,
irrevocably deliver to the Depositary on behalf of the Escrow Agent, an amount in U.S. dollars (“Dollars”) and immediately available funds equal to $697,731,000 for deposit on behalf of the Escrow Agent with the Depositary in
accordance with Section 2.1 of the Deposit Agreement. The Underwriters hereby instruct the Escrow Agent, upon receipt of such sum from the Underwriters, to confirm such receipt by executing and delivering to the Pass 
  

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 [Escrow and Paying Agent Agreement (Class A)] 
  
 Through Trustee an Escrow Receipt in the form of Exhibit A hereto (an
“Escrow Receipt”), (a) to be affixed by the Pass Through Trustee to each Certificate and (b) to evidence the same percentage interest (the “Escrow Interest”) in the Account Amounts (as defined below) as
the Fractional Undivided Interest in the Pass Through Trust evidenced by the Certificate to which it is to be affixed. The Escrow Agent shall provide to the Pass Through Trustee for attachment to each Certificate newly issued under and in accordance
with the Pass Through Trust Agreement an executed Escrow Receipt as the Pass Through Trustee may from time to time request of the Escrow Agent. Each Escrow Receipt shall be registered by the Escrow Agent in a register (the
“Register”) maintained by the Escrow Agent in the name of the same holder that is the holder of the Certificate to which it is attached and may not thereafter be detached from such Certificate to which it is to be affixed prior to
the distribution of the Final Withdrawal (the “Final Distribution”). After the Final Distribution, no additional Escrow Receipts shall be issued and the Pass Through Trustee shall request the return to the Escrow Agent for
cancellation of all outstanding Escrow Receipts. 
 1.04. Payments to Receiptholders. All payments and distributions made
to holders of an Escrow Receipt (collectively “Receiptholders”) in respect of the Escrow Receipt shall be made only from amounts deposited in the Paying Agent Account (as defined below) (“Account Amounts”). Each
Receiptholder, by its acceptance of an Escrow Receipt, agrees that (a) it will look solely to the Account Amounts for any payment or distribution due to such Receiptholder pursuant to the terms of the Escrow Receipt and this Agreement (subject
to Section 15 hereof) and (b) it will have no recourse to United, the Pass Through Trustee, the Paying Agent, the Escrow Agent or Wilmington Trust Company, except as expressly provided herein or in the Pass Through Trust Agreement. No
Receiptholder shall have any right to vote or in any manner otherwise control the operation and management of the Paying Agent Account or the obligations of the parties hereto, nor shall anything set forth herein, or contained in the terms of the
Escrow Receipt, be construed so as to constitute the Receiptholders from time to time as partners or members of an association. 
 1.05. Mutilated, Destroyed, Lost or Stolen Escrow Receipt. If (a) any mutilated Escrow Receipt is surrendered to the Escrow Agent or the Escrow Agent receives evidence to its satisfaction of the destruction, loss or theft of any
Escrow Receipt and (b) there is delivered to the Escrow Agent and the Pass Through Trustee such security, indemnity or bond, as may be required by them to hold each of them harmless, then, absent notice to the Escrow Agent or the Pass Through
Trustee that such destroyed, lost or stolen Escrow Receipt has been acquired by a bona fide purchaser, and provided that the requirements of Section 8-405 of the Uniform Commercial Code in effect in any applicable jurisdiction are met, the
Escrow Agent shall execute, authenticate and deliver, in exchange for or in lieu of any such mutilated, destroyed, lost or stolen Escrow Receipt, a new Escrow Receipt or Escrow Receipts and of like Escrow Interest in the Account Amounts and bearing
a number not contemporaneously outstanding. 
 In connection with the issuance of any new Escrow Receipt under this
Section 1.05, the Escrow Agent may require the payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in relation thereto and any other expenses (including the fees and expenses of the Pass Through Trustee
and the Escrow Agent) connected therewith. 
  

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 [Escrow and Paying Agent Agreement (Class A)] 
  
 Any duplicate Escrow Receipt issued pursuant to this
Section 1.05 shall constitute conclusive evidence of the appropriate Escrow Interest in the Account Amounts, as if originally issued, whether or not the lost, stolen or destroyed Escrow Receipt shall be found at any time. 
 The provisions of this Section are exclusive and shall preclude (to the extent lawful) all other rights and remedies with respect to
the replacement or payment of mutilated, destroyed, lost or stolen Escrow Receipts. 
 1.06. Additional Escrow Amounts.
On the date of any Financing Withdrawal, the Pass Through Trustee may re-deposit with the Depositary some or all of the amounts so withdrawn in accordance with Section 2.4 of the Deposit Agreement. 
 1.07. Resignation or Removal of Escrow Agent. Subject to the appointment and acceptance of a successor Escrow Agent as provided
below, the Escrow Agent may resign at any time by giving 30 days’ prior written notice thereof to the Investors, but may not otherwise be removed except for cause by the written consent of the Investors with respect to Investors representing
Escrow Interests aggregating not less than a majority in interest in the Account Amounts (an “Action of Investors”). Upon any such resignation or removal, the Investors, by an Action of Investors, shall have the right to appoint a
successor Escrow Agent. If no successor Escrow Agent shall have been so appointed and shall have accepted such appointment within 30 days after the retiring Escrow Agent’s giving of notice of resignation or the removal of the retiring Escrow
Agent, then the retiring Escrow Agent may appoint a successor Escrow Agent. Any successor Escrow Agent shall be a bank which has an office in the United States with a combined capital and surplus of at least $100,000,000. Upon the acceptance of any
appointment as Escrow Agent hereunder by a successor Escrow Agent, such successor Escrow Agent shall enter into such documents as the Pass Through Trustee shall require and shall thereupon succeed to and become vested with all the rights, powers,
privileges and duties of the retiring Escrow Agent, and the retiring Escrow Agent shall be discharged from its duties and obligations hereunder. No resignation or removal of the Escrow Agent shall be effective unless a written confirmation shall
have been obtained from each of Moody’s Investors Service, Inc. and Standard & Poor’s Ratings Services, a Standard & Poor’s Financial Services LLC business, that the replacement of the Escrow Agent with the successor
Escrow Agent will not result in (a) a reduction of the rating for the Certificates below the then current rating for the Certificates or (b) a withdrawal or suspension of the rating of the Certificates. 
 1.08. Persons Deemed Owners. Prior to due presentment of a Certificate for registration of transfer, the Escrow Agent and the Paying
Agent may treat the Person in whose name any Escrow Receipt is registered (as of the day of determination) as the owner of such Escrow Receipt for the purpose of receiving distributions pursuant to this Agreement and for all other purposes
whatsoever, and neither the Escrow Agent nor the Paying Agent shall be affected by any notice to the contrary. 
 1.09.
Further Assurances. The Escrow Agent agrees to take such actions, and execute such other documents, as may be reasonably requested by the Pass Through Trustee in order to effectuate the purposes of this Agreement and the performance by the
Escrow Agent of its obligations hereunder. 
  

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 [Escrow and Paying Agent Agreement (Class A)] 
  
 Section 2. Paying Agent. 
 2.01. Appointment of Paying Agent. The Escrow Agent hereby irrevocably appoints and authorizes the Paying Agent to act as its paying
agent hereunder, for the benefit of the Investors, for such specific purposes and with such powers as are specifically delegated to the Paying Agent by the terms of this Agreement, together with such other powers as are reasonably incidental
thereto. Any and all money received and held by the Paying Agent under this Agreement or the Deposit Agreement shall be held in the Paying Agent Account for the benefit of the Investors. The Paying Agent (which term as used in this sentence shall
include reference to its affiliates and its own and its affiliates’ officers, directors, employees and agents): (a) shall have no duties or responsibilities except those expressly set forth in this Agreement, and shall not by reason of
this Agreement be a trustee for the Escrow Agent; (b) shall not be responsible to the Escrow Agent for any recitals, statements, representations or warranties of any person other than itself contained in this Agreement or for the failure by the
Escrow Agent or any other person or entity (other than the Paying Agent) to perform any of its obligations hereunder (whether or not the Paying Agent shall have any knowledge thereof); and (c) except in respect of its express obligations
hereunder, shall not be responsible for any action taken or omitted to be taken by it hereunder or provided for herein or in connection herewith, except for its own willful misconduct or gross negligence (or simple negligence in connection with the
handling of funds actually received by it in accordance with the terms of this Agreement). 
 2.02. Establishment of Paying
Agent Account. The Paying Agent shall establish a deposit account (the “Paying Agent Account”) at Wilmington Trust Company in the name of the Escrow Agent. It is expressly understood by the parties hereto that the Paying Agent
is acting as the paying agent of the Escrow Agent hereunder and that no amounts on deposit in the Paying Agent Account constitute part of the Trust Property. 
 2.03. Payments from Paying Agent Account. The Escrow Agent hereby irrevocably instructs the Paying Agent, and the Paying Agent agrees to act, as follows: 
 (a) Upon the confirmation by the Paying Agent of receipt in the Paying Agent Account from the Depositary of any amount in respect of the
Final Withdrawal, the Paying Agent shall forthwith distribute the entire amount of the Final Withdrawal deposited therein by the Depositary. There shall be so distributed to each Receiptholder of record on the 15th day (whether or not a Business
Day) preceding the Final Withdrawal Date by check mailed to such Receiptholder, at the address appearing in the Register, such Receiptholder’s pro rata share (based on the Escrow Interest in the Account Amounts held by such Receiptholder) of
the total amount in the Paying Agent Account on account of such Final Withdrawal, except that, with respect to Escrow Receipts registered on the Record Date in the name of The Depositary Trust Company “DTC”), such distribution shall
be made by wire transfer in immediately available funds to the account designated by DTC. 
 (b) If any payment of interest or
principal in respect of the Final Withdrawal is not received by the Paying Agent within five days of the applicable date when due, then it shall be distributed to Receiptholders after actual receipt by the Paying Agent on the same basis as a Special
Payment is distributed under the Pass Through Trust Agreement. 
  

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 [Escrow and Paying Agent Agreement (Class A)] 
  
 (c) The Paying Agent shall include with any check mailed
pursuant to this Section any notice required to be distributed under the Pass Through Trust Agreement that is furnished to the Paying Agent by the Pass Through Trustee. 
 2.04. Withholding Taxes. The Paying Agent shall exclude and withhold from each distribution of accrued interest on the Deposits (as
defined in the Deposit Agreement) and any amount in respect of the Final Withdrawal any and all withholding taxes applicable thereto as required by law. The Paying Agent agrees to act as such withholding agent and, in connection therewith, whenever
any present or future taxes or similar charges are required to be withheld with respect to any amounts payable in respect of the Deposits (as defined in the Deposit Agreement) or the escrow amounts, to withhold such amounts and timely pay the same
to the appropriate authority in the name of and on behalf of the Receiptholders, that it will file any necessary withholding tax returns or statements when due, and that, as promptly as possible after the payment thereof, it will deliver to each
such Receiptholder appropriate documentation showing the payment thereof, together with such additional documentary evidence as such Receiptholder may reasonably request from time to time. The Paying Agent agrees to file any other information
reports as it may be required to file under United States law. 
 2.05. Resignation or Removal of Paying Agent. Subject
to the appointment and acceptance of a successor Paying Agent as provided below, the Paying Agent may resign at any time by giving 30 days’ prior written notice thereof to the Escrow Agent, but may not otherwise be removed except for cause by
the Escrow Agent. Upon any such resignation or removal, the Escrow Agent shall have the right to appoint a successor Paying Agent. If no successor Paying Agent shall have been so appointed and shall have accepted such appointment within 30 days
after the retiring Paying Agent’s giving of notice of resignation or the removal of the retiring Paying Agent, then the retiring Paying Agent may appoint a successor Paying Agent. Any successor Paying Agent shall be a bank which has an office
in the United States with a combined capital and surplus of at least $100,000,000. Upon the acceptance of any appointment as Paying Agent hereunder by a successor Paying Agent, such successor Paying Agent shall enter into such documents as the
Escrow Agent shall require and shall thereupon succeed to and become vested with all the rights, powers, privileges and duties of the retiring Paying Agent, and the retiring Paying Agent shall be discharged from its duties and obligations hereunder.

 2.06. Notice of Final Withdrawal. Promptly after receipt by the Paying Agent of notice that the Escrow Agent has
requested a Final Withdrawal or that a Final Withdrawal will be made, the Paying Agent shall cause notice of the distribution of such Final Withdrawal to be mailed to each of the Receiptholders at its address as it appears in the Register. Such
notice shall be mailed not less than 15 days prior to the Final Withdrawal Date. Such notice shall set forth: 
 (i) the Final Withdrawal Date and the date for determining Receiptholders of record who shall be entitled to receive distributions in respect of such Final Withdrawal, 
 (ii) the amount of the payment in respect of such Final Withdrawal for each $1,000 face amount Certificate (based on
information provided by the Pass Through Trustee) and the amount thereof constituting unused Deposits (as defined in the Deposit Agreement) and interest thereon, and 
  

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 [Escrow and Paying Agent Agreement (Class A)] 
  
 (iii) if the Final Withdrawal Date is the same
date as a Regular Distribution Date, the total amount to be received on such date for each $1,000 face amount Certificate (based on information provided by the Pass Through Trustee). 
 Such mailing may include any notice required to be given to Certificateholders in connection with such distribution pursuant to the Pass
Through Trust Agreement. 
 Section 3. Payments. If, notwithstanding the instructions in Section 4 of
the Deposit Agreement that all amounts payable to the Escrow Agent under the Deposit Agreement be paid by the Depositary directly to the Paying Agent or the Pass Through Trustee or a Replacement Depositary (depending on the circumstances), the
Escrow Agent receives any payment thereunder, then the Escrow Agent shall forthwith pay such amount in Dollars and in immediately available funds by wire transfer to (a) in the case of any Final Withdrawal, directly to the Paying Agent Account,
(b) in the case of any Financing Withdrawal, directly to the Pass Through Trustee or its designee as specified and in the manner provided in the Applicable Notice of Financing Withdrawal and (c) in the case of any Replacement Withdrawal,
to the Replacement Depositary as provided in the Replacement Depositary Agreement. The Escrow Agent hereby waives any and all rights of set-off, combination of accounts, right of retention or similar right (whether arising under applicable law,
contract or otherwise) it may have against amounts payable to the Paying Agent howsoever arising. 
 Section 4.
Other Actions. The Escrow Agent shall take such other actions under or in respect of the Deposit Agreement (including, without limitation, the enforcement of the obligations of the Depositary thereunder) as the Investors, by an Action of
Investors, may from time to time request. 
 Section 5. Representations and Warranties of the Escrow Agent.
The Escrow Agent represents and warrants to United, the Investors, the Paying Agent and the Pass Through Trustee as follows: 
 (i) it is a banking corporation duly organized and validly existing in good standing under the laws of the State of Delaware; 
 (ii) it has full power, authority and legal right to conduct its business and operations as currently conducted and to enter
into and perform its obligations under this Agreement, the Deposit Agreement and any Replacement Deposit Agreement; 
 (iii) the execution, delivery and performance of each of this Agreement, the Deposit Agreement and any Replacement Deposit Agreement have been duly authorized by all necessary corporate action on the part of it and do not require any
stockholder approval, or approval or consent of any trustee or holder of any indebtedness or obligations of it, and each such document (other than a Replacement Deposit Agreement) has been duly executed and delivered by it and constitutes its legal,
valid and binding obligations enforceable against it in accordance with the terms hereof or thereof except as such enforceability may be limited by bankruptcy, insolvency, moratorium, reorganization or other similar laws or equitable principles of
general application to or affecting the enforcement of creditors’ rights generally (regardless of whether such enforceability is considered in a proceeding in equity or at law); 
  

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 [Escrow and Paying Agent Agreement (Class A)] 
  
 (iv) no authorization, consent or approval of or
other action by, and no notice to or filing with, any United States federal or state of Delaware governmental authority or regulatory body is required for the execution, delivery or performance by it of this Agreement or the Deposit Agreement or any
Replacement Deposit Agreement; 
 (v) neither the execution, delivery or performance by it of this Agreement or
the Deposit Agreement or any Replacement Deposit Agreement, nor compliance with the terms and provisions hereof or thereof, conflicts or will conflict with or results or will result in a breach or violation of any of the terms, conditions or
provisions of, or will require any consent or approval under, any law, governmental rule or regulation or the charter documents, as amended, or bylaws, as amended, of it or any similar instrument binding on it or any order, writ, injunction or
decree of any court or governmental authority against it or by which it or any of its properties is bound or any indenture, mortgage or contract or other agreement or instrument to which it is a party or by which it or any of its properties is
bound, or constitutes or will constitute a default thereunder or results or will result in the imposition of any lien upon any of its properties; and 
 (vi) there are no pending or, to its knowledge, threatened actions, suits, investigations or proceedings (whether or not purportedly on behalf of it) against or affecting it or any of its property before
or by any court or administrative agency which, if adversely determined, (A) would adversely affect the ability of it to perform its obligations under this Agreement or the Deposit Agreement or any Replacement Deposit Agreement or
(B) would call into question or challenge the validity of this Agreement or the Deposit Agreement or the enforceability hereof or thereof in accordance with the terms hereof or thereof, nor is the Escrow Agent in default with respect to any
order of any court, governmental authority, arbitration board or administrative agency so as to adversely affect its ability to perform its obligations under this Agreement or the Deposit Agreement. 
 Section 6. Representations and Warranties of the Paying Agent. The Paying Agent represents and warrants to United, the
Investors, the Escrow Agent and the Pass Through Trustee as follows: 
 (i) it is a banking corporation duly
organized and validly existing in good standing under the laws of the State of Delaware; 
 (ii) it has full
power, authority and legal right to conduct its business and operations as currently conducted and to enter into and perform its obligations under this Agreement; 
 (iii) the execution, delivery and performance of this Agreement has been duly authorized by all necessary corporate action on
the part of it and does not require any stockholder approval, or approval or consent of any trustee or holder of any 
  

 9 

 [Escrow and Paying Agent Agreement (Class A)] 
  
 indebtedness or obligations of it, and such document has been
duly executed and delivered by it and constitutes its legal, valid and binding obligations enforceable against it in accordance with the terms hereof except as such enforceability may be limited by bankruptcy, insolvency, moratorium, reorganization
or other similar laws or equitable principles of general application to or affecting the enforcement of creditors’ rights generally (regardless of whether such enforceability is considered in a proceeding in equity or at law); 
 (iv) no authorization, consent or approval of or other action by, and no notice to or filing with, any United States federal
or state of Delaware governmental authority or regulatory body is required for the execution, delivery or performance by it of this Agreement; 
 (v) neither the execution, delivery or performance by it of this Agreement, nor compliance with the terms and provisions hereof, conflicts or will conflict with or results or will result in a breach or
violation of any of the terms, conditions or provisions of, or will require any consent or approval under, any law, governmental rule or regulation or the charter documents, as amended, or bylaws, as amended, of it or any similar instrument binding
on it or any order, writ, injunction or decree of any court or governmental authority against it or by which it or any of its properties is bound or any indenture, mortgage or contract or other agreement or instrument to which it is a party or by
which it or any of its properties is bound, or constitutes or will constitute a default thereunder or results or will result in the imposition of any lien upon any of its properties; and 
 (vi) there are no pending or, to its knowledge, threatened actions, suits, investigations or proceedings (whether or not
purportedly on behalf of it) against or affecting it or any of its property before or by any court or administrative agency which, if adversely determined, (A) would adversely affect the ability of it to perform its obligations under this
Agreement or (B) would call into question or challenge the validity of this Agreement or the enforceability hereof in accordance with the terms hereof, nor is the Paying Agent in default with respect to any order of any court, governmental
authority, arbitration board or administrative agency so as to adversely affect its ability to perform its obligations under this Agreement. 
 Section 7. Indemnification. Except for actions expressly required of the Escrow Agent or the Paying Agent hereunder, each of the Escrow Agent and the Paying Agent shall in all cases be
fully justified in failing or refusing to act hereunder unless it shall have been indemnified (both in such capacities and individually) by the party requesting such action in a manner reasonably satisfactory to it against any and all liability and
expense which may be incurred by it by reason of taking or continuing to take any such action. In the event United requests any amendment to any Operative Agreement (as defined in the Note Purchase Agreement), the Pass Through Trustee agrees to pay
all reasonable fees and expenses (including, without limitation, fees and disbursements of counsel) of the Escrow Agent and the Paying Agent in connection therewith. 
  

 10 

 [Escrow and Paying Agent Agreement (Class A)] 
  
 Section 8. Amendment, Etc. Upon request of
the Pass Through Trustee and approval by an Action of Investors, the Escrow Agent and Paying Agent shall enter into an amendment to this Agreement, so long as such amendment does not adversely affect the rights or obligations of the Escrow Agent or
the Paying Agent, provided that upon request of the Pass Through Trustee and without any consent of the Investors, the Escrow Agent and Paying Agent shall enter into an amendment to this Agreement for any of the following purposes:

 (1) to correct or supplement any provision in this Agreement which may be defective or inconsistent with any
other provision herein or to cure any ambiguity or correct any mistake or to modify any other provision with respect to matters or questions arising under this Agreement, provided that any such action shall not materially adversely affect the
interests of the Investors; or 
 (2) to comply with any requirement of the SEC, applicable law, rules or
regulations of any exchange or quotation system on which the Certificates are listed or any regulatory body; or 
 (3) to evidence and provide for the acceptance of appointment under this Agreement of a successor Escrow Agent, successor Paying Agent or successor Pass Through Trustee. 
 Section 9. Notices. Unless otherwise expressly provided herein, any notice or other communication under this Agreement
shall be in writing (including by facsimile) and shall be deemed to be given and effective upon receipt thereof (or, if received outside of business hours, at the opening of business on the next Business Day). All notices shall be sent to
(a) in the case of the Investors, as their respective addresses shall appear in the Register, (b) in the case of the Escrow Agent, Wilmington Trust Company, 1100 North Market Street, Wilmington, Delaware 19890-0001, Attention: Corporate
Capital Market Services (Telecopier: 302-636-4140), (c) in the case of the Pass Through Trustee, Wilmington Trust Company, 1100 North Market Street, Wilmington, Delaware 19890-0001, Attention: Corporate Capital Market Services (Telecopier:
302-636-4140), or (d) in the case of the Paying Agent, Wilmington Trust Company, 1100 North Market Street, Wilmington, Delaware 19890-0001, Attention: Corporate Capital Market Services (Telecopier: 302-636-4140), in each case with a copy to
United, United Air Lines, Inc., 77 West Wacker Drive, Chicago, IL 60601, Attention: Stephen R. Lieberman, Vice President and Treasurer (Telecopier: 312-997-8333) with a copy to: United Air Lines, Inc., 77 West Wacker Drive, Chicago, IL 60601,
Attention: General Counsel (Telecopier: 312-997-8333) (or at such other address as any such party may specify from time to time in a written notice to the other parties). On or prior to the execution of this Agreement, the Pass Through Trustee has
delivered to the Escrow Agent a certificate containing specimen signatures of the representatives of the Pass Through Trustee who are authorized to give notices and instructions with respect to this Agreement. The Escrow Agent may conclusively rely
on such certificate until the Escrow Agent receives written notice from the Pass Through Trustee to the contrary. 
 The Escrow
Agent shall notify the Receiptholders in the event of a default in the payment of any Final Withdrawal in accordance with the terms of the Deposit Agreement and this Agreement and shall promptly forward to Receiptholders upon receipt copies of all
written communications relating to any payments due to the Receiptholders in respect of the Deposits. 
  

 11 

 [Escrow and Paying Agent Agreement (Class A)] 
  
 Section 10. Transfer. No party hereto shall
be entitled to assign or otherwise transfer this Agreement (or any interest herein) other than (in the case of the Escrow Agent) to a successor escrow agent under Section 1.07 hereof or (in the case of the Paying Agent) to a successor paying
agent under Section 2.05 hereof, and any purported assignment in violation thereof shall be void. This Agreement shall be binding upon the parties hereto and their respective successors and (in the case of the Escrow Agent and the Paying Agent)
their respective permitted assigns. Upon the occurrence of the Transfer (as defined below) contemplated by the Assignment and Assumption Agreement (as defined below), the Pass Through Trustee shall (without further act) be deemed to have transferred
all of its right, title and interest in and to this Agreement to the trustee of the Successor Trust (as defined below) and, thereafter, the trustee of the Successor Trust shall be deemed to be the “Pass Through Trustee” hereunder
with the rights and obligations of the “Pass Through Trustee” hereunder and each reference herein to “United Air Lines Pass Through Trust “2009-2A-O” shall be deemed to be a reference to “United Air Lines Pass Through
Trust 2009-2A-S”. The parties hereto hereby acknowledge and consent to the Transfer contemplated by the Assignment and Assumption Agreement. As used herein, “Transfer” means the transfers of the assets to the Successor Trust
contemplated by the Assignment and Assumption Agreement; “Assignment and Assumption Agreement” means the Assignment and Assumption Agreement to be entered into between the Pass Through Trustee and the trustee of the Successor Trust;
“Successor Trust” means the United Air Lines Pass Through Trust 2009-2A-S. 
 Section 11. Entire
Agreement. This Agreement sets forth all of the promises, covenants, agreements, conditions and understandings among the Escrow Agent, the Paying Agent, the Underwriters and the Pass Through Trustee with respect to the subject matter hereof, and
supersedes all prior and contemporaneous agreements and undertakings, inducements or conditions, express or implied, oral or written. 
 Section 12. Governing Law. This Agreement shall be governed by, and construed in accordance with, the laws of the State of New York (without regard to principles of conflicts of laws thereof (other than
Section 5-1401 and Section 5-1402 of the New York General Obligations Law)). 
 Section 13. Waiver of
Jury Trial Right. EACH OF THE ESCROW AGENT, THE PAYING AGENT, THE INVESTORS AND THE PASS THROUGH TRUSTEE ACKNOWLEDGES AND ACCEPTS THAT IN ANY SUIT, ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS AGREEMENT SUCH PARTY IRREVOCABLY
WAIVES ITS RIGHT TO A TRIAL BY JURY. 
 Section 14. Counterparts. This Agreement may be executed in one
or more counterparts, all of which taken together shall constitute one instrument. 
 Section 15. Rights of
Holders. Each Receiptholder shall have the right (individually and without the need for any other action of any Person, including the Escrow Agent or any other Receiptholder), upon any default in the payment of the Final Withdrawal when due by
the Depositary in accordance with the terms of the Deposit Agreement and this Agreement, (i) to proceed directly against the Depositary by making a demand to the Depositary for the portion of such payment that would have been distributed to
such Receiptholder pursuant to this Agreement or by bringing suit to enforce payment of such portion and (ii) to enforce any other rights 
  

 12 

 [Escrow and Paying Agent Agreement (Class A)] 
  
 that the Escrow Agent may have in respect of amounts due from the Depositary
under the Deposit Agreement and this Agreement that would have been distributed to such Receiptholder pursuant to this Agreement. Any recovery on such enforcement action shall belong solely to the Receiptholder who brought such action, and not
to the Escrow Agent or any other Receiptholder individually or to Receiptholders as a group. 
 *    
*     * 
  

 13 

 [Escrow and Paying Agent Agreement (Class A)] 
  
 IN WITNESS WHEREOF, the Escrow Agent, the Paying Agent,
the Underwriters and the Pass Through Trustee have caused this Escrow and Paying Agent Agreement (Class A) to be duly executed as of the day and year first above written. 
  

			
	 WILMINGTON TRUST COMPANY, as
 Escrow Agent

		
	 By:
	 	  

	 Name:
	 	
	 Title:
	 	
	
	 MORGAN STANLEY & CO.
 INCORPORATED, J.P. MORGAN
 SECURITIES INC. and GOLDMAN,
 SACHS & CO., as Representatives of the
 several Underwriters

		
	 By:
	 	  

	 Name:
	 	
	 Title:
	 	
		
	 By:
	 	  

	 Name:
	 	
	 Title:
	 	
		
	 By:
	 	  

		 	(Goldman, Sachs & Co.)
	
	 WILMINGTON TRUST COMPANY, not
 in its individual capacity, but solely as Pass
 Through Trustee for and on behalf of
United
 Air Lines Pass Through Trust 2009-2A-O

		
	 By:
	 	  

	 Name:
	 	
	 Title:
	 	
	
	 WILMINGTON TRUST COMPANY, as
 Paying Agent

		
	 By:
	 	  

	 Name:
	 	
	 Title:
	 	

  

 14 

 [Escrow and Paying Agent Agreement (Class A)] 
  
 EXHIBIT A 
 UNITED AIR LINES 2009-2A-O ESCROW RECEIPT 
 No.         
 This Escrow Receipt
evidences a fractional undivided interest in amounts (“Account Amounts”) from time to time deposited into a certain paying agent account (the “Paying Agent Account”) described in the Escrow and Paying Agent
Agreement (Class A) dated as of November 24, 2009 (as amended, modified or supplemented from time to time, the “Escrow and Paying Agent Agreement”) among Wilmington Trust Company, as Escrow Agent (in such capacity, together
with its successors in such capacity, the “Escrow Agent”), Morgan Stanley & Co. Incorporated, J.P. Morgan Securities Inc. and Goldman, Sachs & Co., as representatives of the several Underwriters, Wilmington Trust
Company, as Pass Through Trustee (in such capacity, together with its successors in such capacity, the “Pass Through Trustee”) and Wilmington Trust Company, as paying agent (in such capacity, together with its successors in such
capacity, the “Paying Agent”). Capitalized terms not defined herein shall have the meanings assigned to them in the Escrow and Paying Agent Agreement. 
 This Escrow Receipt is issued under and is subject to the terms, provisions and conditions of the Escrow and Paying Agent Agreement. By virtue of its acceptance hereof the holder of this Escrow Receipt
assents and agrees to be bound by the provisions of the Escrow and Paying Agent Agreement and this Escrow Receipt. 
 This
Escrow Receipt represents a fractional undivided interest in amounts deposited from time to time in the Paying Agent Account, and grants or represents no rights, benefits or interests of any kind in respect of any assets or property other than such
amounts. This Escrow Receipt evidences the same percentage interest in the Account Amounts as the Fractional Undivided Interest in the Pass Through Trust evidenced by the Certificate to which this Escrow Receipt is affixed. 
 All payments and distributions made to Receiptholders in respect of the Escrow Receipt shall be made only from Account Amounts deposited in
the Paying Agent Account. The holder of this Escrow Receipt, by its acceptance of this Escrow Receipt, agrees that it will look solely to the Account Amounts for any payment or distribution due to it pursuant to this Escrow Receipt (or, in case the
Depositary shall default in its obligation to make a payment under the Deposit Agreement that would be an Account Amount, to the Depositary) and that it will not have any recourse to United, the Pass Through Trustee, the Paying Agent or the Escrow
Agent, except as expressly provided herein or in the Pass Through Trust Agreement. No Receiptholder of this Escrow Receipt shall have any right to vote or in any manner otherwise control the operation and management of the Paying Agent Account, nor
shall anything set forth herein, or contained in the terms of this Escrow Receipt, be construed so as to constitute the Receiptholders from time to time as partners or members of an association. 
 This Escrow Receipt may not be assigned or transferred except in connection with the assignment or transfer of the Certificate to which this
Escrow Receipt is affixed. After payment to the holder hereof of its Escrow Interest in the Final Distribution, upon the request of the Pass Through Trustee, the holder hereof will return this Escrow Receipt to the Pass Through Trustee. 

 

 EXHIBIT A 
 Page 1 

 [Escrow and Paying Agent Agreement (Class A)] 
  
 The Paying Agent may treat the person in whose name the
Certificate to which this Escrow Receipt is attached as the owner hereof for all purposes, and the Paying Agent shall not be affected by any notice to the contrary. 
 THIS ESCROW RECEIPT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK (WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAWS THEREOF (OTHER THAN SECTION 5-1401 AND 5-1402
OF THE NEW YORK GENERAL OBLIGATIONS LAW)). 
 *         *     *

  

 EXHIBIT A 
 Page 2 

 [Escrow and Paying Agent Agreement (Class A)] 
  
 IN WITNESS WHEREOF, the Escrow Agent has caused this
Escrow Receipt to be duly executed. 
 Dated:
                    , 2009 
  

			
	 WILMINGTON TRUST COMPANY, as
 Escrow Agent

		
	By:	 	 
	Name:	 	
	Title:	 	

  

 EXHIBIT A 
 Page 3 

 [Escrow and Paying Agent Agreement (Class A)] 
  
 EXHIBIT B 
 WITHDRAWAL CERTIFICATE 
 (Class A) 
 WILMINGTON TRUST COMPANY, 
 as Escrow Agent 
 Dear Sirs:

 Reference is made to the Escrow and Paying Agent Agreement, dated as of November 24, 2009 (the
“Agreement”). [We hereby certify to you that the conditions to the obligations of the undersigned to execute a Participation Agreement pursuant to the Note Purchase Agreement have been satisfied] [We hereby notify you that the
Depositary is being replaced in accordance with Section 4(a)(iii) of the Note Purchase Agreement]. Pursuant to Section 1.02(c) of the Agreement, please execute the attached Notice of Financing Withdrawal [Notice of Replacement Withdrawal]
and immediately transmit by facsimile to the Depositary, at [                    ], Attention:
[                    ] – Americas. 
  

			
	Very truly yours,
	
	WILMINGTON TRUST COMPANY, not
	 in its individual capacity but solely as Pass
 Through Trustee

		
	By:	 	 
	Name:	 	
	Title:	 	

 Dated:
                    , 200     
  

 EXHIBIT B 
 Page 1Escrow and Paying Agent Agreement (Class B)

 Exhibit 4.17 
 ESCROW AND 
 PAYING AGENT AGREEMENT (CLASS B) 

 dated as of November 24, 2009 
 among 
 WILMINGTON TRUST COMPANY 
 as Escrow Agent 
 MORGAN STANLEY & CO. INCORPORATED, 
 J.P. MORGAN SECURITIES INC. 
 and  
 GOLDMAN, SACHS & CO. 
 as Representatives of the several Underwriters 
 WILMINGTON TRUST COMPANY, 
 not in its individual capacity, 
 but solely as Pass Through Trustee 
 for and on behalf of 
 United Air Lines Pass Through Trust 2009-2B-O 
 as Pass Through Trustee 
 and 
 WILMINGTON
TRUST COMPANY 
 as Paying Agent 

 TABLE OF CONTENTS 
  
  

					
	 	  	 	  	Page
	Section 1.	  	Escrow Agent	  	2
	            1.01.	  	Appointment of Escrow Agent	  	2
	            1.02.	  	Instruction; Etc	  	3
	            1.03.	  	Initial Escrow Amount; Issuance of Escrow Receipts	  	3
	            1.04.	  	Payments to Receiptholders	  	4
	            1.05.	  	Mutilated, Destroyed, Lost or Stolen Escrow Receipt	  	4
	            1.06.	  	Additional Escrow Amounts	  	5
	            1.07.	  	Resignation or Removal of Escrow Agent	  	5
	            1.08.	  	Persons Deemed Owners	  	5
	            1.09.	  	Further Assurances	  	5
			
	Section 2.	  	Paying Agent	  	6
	            2.01.	  	Appointment of Paying Agent	  	6
	            2.02.	  	Establishment of Paying Agent Account	  	6
	            2.03.	  	Payments from Paying Agent Account	  	6
	            2.04.	  	Withholding Taxes	  	7
	            2.05.	  	Resignation or Removal of Paying Agent	  	7
	            2.06.	  	Notice of Final Withdrawal	  	7
			
	Section 3.	  	Payments	  	8
			
	Section 4.	  	Other Actions	  	8
			
	Section 5.	  	Representations and Warranties of the Escrow Agent	  	8
			
	Section 6.	  	Representations and Warranties of the Paying Agent	  	9
			
	Section 7.	  	Indemnification	  	10
			
	Section 8.	  	Amendment, Etc	  	11
			
	Section 9.	  	Notices	  	11
			
	Section 10.	  	Transfer	  	12
			
	Section 11.	  	Entire Agreement	  	12
			
	Section 12.	  	Governing Law	  	12
			
	Section 13.	  	Waiver of Jury Trial Right	  	12
			
	Section 14.	  	Counterparts	  	12
			
	Section 15.	  	Rights of Holders	  	12
			
	Exhibit A	  	Escrow Receipt	  	
	Exhibit B	  	Withdrawal Certificate	  	

  

 i 

 ESCROW AND PAYING AGENT AGREEMENT (CLASS B) 
 ESCROW AND PAYING AGENT AGREEMENT (Class B) dated as of November 24, 2009 (as amended, modified or supplemented from time to
time, this “Agreement”) among WILMINGTON TRUST COMPANY, a Delaware banking corporation, as Escrow Agent (in such capacity, together with its successors in such capacity, the “Escrow Agent”); MORGAN
STANLEY & CO. INCORPORATED, J.P. MORGAN SECURITIES INC. and GOLDMAN, SACHS & CO., as representatives of the several Underwriters (the “Underwriters” and together with their respective transferees
and assigns as registered owners of the Certificates, the “Investors”) under the Underwriting Agreement referred to below; WILMINGTON TRUST COMPANY, a Delaware banking corporation, not in its individual capacity except as
otherwise expressly provided herein, but solely as trustee (in such capacity, together with its successors in such capacity, the “Pass Through Trustee”) under the Pass Through Trust Agreement referred to below; and WILMINGTON
TRUST COMPANY, a Delaware banking corporation, as paying agent hereunder (in such capacity, together with its successors in such capacity, the “Paying Agent”). 
 W I T N E S S E T H: 
 WHEREAS, United Air Lines, Inc. (“United”) and the Pass Through Trustee have entered into a Trust Supplement, dated as of November 24, 2009 (the “Trust
Supplement”) to the Pass Through Trust Agreement, dated as of June 26, 2007 (together, as amended, modified or supplemented from time to time in accordance with the terms thereof, the “Pass Through Trust Agreement”)
relating to United Air Lines Pass Through Trust 2009-2B-O (the “Pass Through Trust”) pursuant to which the United Air Lines Pass Through Trust, Series 2009-2B-O Certificates referred to therein (the “Certificates”)
are being issued (the date of such issuance, the “Issuance Date”); 
 WHEREAS, United and the
Underwriters have entered into an Underwriting Agreement dated November 16, 2009 (as amended, modified or supplemented from time to time in accordance with the terms thereof, the “Underwriting Agreement”) pursuant to which the
Pass Through Trustee will issue and sell the Certificates to the Underwriters (the net proceeds of such sale being herein referred to as the “Net Proceeds”); 
 WHEREAS, United, the Pass Through Trustee, certain other pass through trustees and certain other persons concurrently herewith are
entering into the Note Purchase Agreement, dated as of the date hereof (the “Note Purchase Agreement”), pursuant to which the Pass Through Trustee has agreed to acquire from time to time on or prior to the Deposit Period Termination
Date (as defined in the Note Purchase Agreement) equipment notes (the “Equipment Notes”) issued to finance certain aircraft currently owned by United utilizing a portion of the Net Proceeds; 
 WHEREAS, the Underwriters and the Pass Through Trustee intend that the Net Proceeds be held in escrow by the Escrow Agent on behalf
of the Investors, subject to withdrawal upon request by the Pass Through Trustee and satisfaction of the conditions set forth in the Note Purchase Agreement for the purpose of purchasing Equipment Notes, and that pending such withdrawal the Net
Proceeds be deposited on behalf of the Escrow Agent with JPMorgan Chase Bank, N.A., a national banking association, as 

 [Escrow and Paying Agent Agreement (Class B)] 
  
 Depositary (the “Depositary” which shall also be deemed to
refer to any Replacement Depositary (as defined in the Note Purchase Agreement) from and after the date on which the Deposits are transferred to such Replacement Depositary) under the Deposit Agreement, dated as of the date hereof between the
Depositary and the Escrow Agent relating to the Pass Through Trust (as amended, modified, supplemented or replaced from time to time in accordance with the terms thereof, the “Deposit Agreement” which shall also be deemed to refer
to any Replacement Deposit Agreement (as defined in the Note Purchase Agreement) to which the Escrow Agent becomes a party pursuant to Section 1.02(a) hereof from and after the transfer of the Deposits from the Depositary to the Replacement
Depositary) pursuant to which, among other things, the Depositary will pay interest for distribution to the Investors and establish accounts from which the Escrow Agent shall make withdrawals upon request of and proper certification by the Pass
Through Trustee; 
 WHEREAS, the Escrow Agent wishes to appoint the Paying Agent to pay amounts required to be
distributed to the Investors in accordance with this Agreement; and 
 WHEREAS, capitalized terms used but not defined
herein shall have the meanings ascribed to such terms in the Pass Through Trust Agreement. 
 NOW, THEREFORE, in
consideration of the obligations contained herein, and for other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the parties hereto hereby agree as follows: 
 Section 1. Escrow Agent. 
 1.01. Appointment of Escrow Agent. Each of the Underwriters, for and on behalf of each of the Investors, hereby irrevocably appoints, authorizes and directs the Escrow Agent to act as escrow agent
and fiduciary hereunder and under the Deposit Agreement for such specific purposes and with such powers as are specifically delegated to the Escrow Agent by the terms of this Agreement, together with such other powers as are reasonably incidental
thereto. Any and all money received and held by the Escrow Agent under this Agreement or the Deposit Agreement shall be held in escrow by the Escrow Agent in accordance with the terms of this Agreement. This Agreement is irrevocable and the
Investors’ rights with respect to any monies received and held in escrow by the Escrow Agent under this Agreement or the Deposit Agreement shall only be as provided under the terms and conditions of this Agreement and the Deposit Agreement. The
Escrow Agent (which term as used in this sentence shall include reference to its affiliates and its own and its affiliates’ officers, directors, employees and agents): (a) shall have no duties or responsibilities except those expressly set
forth in this Agreement; (b) shall not be responsible to the Pass Through Trustee or the Investors for any recitals, statements, representations or warranties of any person other than itself contained in this Agreement or the Deposit Agreement
or for the failure by the Pass Through Trustee, the Investors or any other person or entity (other than the Escrow Agent) to perform any of its obligations hereunder (whether or not the Escrow Agent shall have any knowledge thereof); and
(c) shall not be responsible for any action taken or omitted to be taken by it hereunder or provided for herein or in connection herewith, except for its own willful misconduct or gross negligence (or simple negligence in connection with the
handling of funds actually received by it in accordance with the terms of this Agreement) or breach of its obligations hereunder. 
  

 2 

 [Escrow and Paying Agent Agreement (Class B)] 
  
 1.02. Instruction; Etc. The Underwriters, for and on
behalf of each of the Investors, hereby irrevocably instruct the Escrow Agent, and the Escrow Agent agrees, (a) to enter into the Deposit Agreement and, if requested by the Company pursuant to Section 4(a)(iii) of the Note Purchase
Agreement, to enter into a Replacement Deposit Agreement with the Replacement Depositary specified by the Company, (b) to appoint the Paying Agent as provided in this Agreement, (c) upon receipt at any time and from time to time prior to
the Termination Date (as defined below) of a certificate substantially in the form of Exhibit B hereto (a “Withdrawal Certificate”) executed by the Pass Through Trustee, together with an attached Notice of Financing Withdrawal
in substantially the form of Exhibit A to the Deposit Agreement duly completed by the Pass Through Trustee (the “Applicable Notice of Financing Withdrawal” and the withdrawal to which it relates, a “Financing
Withdrawal”), immediately to execute the Applicable Notice of Financing Withdrawal as Escrow Agent and transmit it to the Depositary by facsimile transmission in accordance with the Deposit Agreement; provided that, upon the request
of the Pass Through Trustee after such transmission, the Escrow Agent shall cancel such Applicable Notice of Financing Withdrawal, (d) upon receipt of a Withdrawal Certificate executed by the Pass Through Trustee, together with an attached
Notice of Replacement Withdrawal in substantially the form of Exhibit C to the Deposit Agreement duly completed by the Pass Through Trustee, to (X) give such Notice of Replacement Withdrawal to the Depositary requesting a withdrawal, on
the date specified in such notice, which shall not be less than Five Business Days after such notice is given (the “Replacement Withdrawal Date”), of all Deposits then held by the Depositary together with all accrued and unpaid
interest on such Deposits to but excluding the Replacement Withdrawal Date, and (Y) direct the Depositary to transfer such Deposits and accrued interest on behalf of the Escrow Agent to the Replacement Depositary in accordance with the
Replacement Deposit Agreement, and (e) if there are any undrawn Deposits (as defined in the Deposit Agreement) on the “Termination Date”, which shall mean the earlier of (i) the Deposit Period Termination Date (as defined
in the Note Purchase Agreement) and (ii) the day on which the Escrow Agent receives notice from the Pass Through Trustee that the Pass Through Trustee’s obligation to purchase Equipment Notes under the Note Purchase Agreement has
terminated, to immediately give notice to the Depositary (with a copy to the Paying Agent) substantially in the form of Exhibit B to the Deposit Agreement requesting a withdrawal of all of the remaining Deposits, together with accrued and
unpaid interest on such Deposits to the date of withdrawal, on the 15th day after the date that such notice of withdrawal is given to the Depositary (or, if not a Business Day, on the next succeeding Business Day) (a “Final
Withdrawal”), provided that if the day scheduled for the Final Withdrawal in accordance with the foregoing is within 10 days before or after a Regular Distribution Date, then the Escrow Agent shall request that such requested Final
Withdrawal be made on such Regular Distribution Date (the date of such requested withdrawal, the “Final Withdrawal Date”). If for any reason the Escrow Agent shall have failed to give the Final Withdrawal notice to the Depositary on
or before February 7, 2010, and there are unwithdrawn Deposits on such date, the Final Withdrawal Date shall be deemed to be February 14, 2010. 
 1.03. Initial Escrow Amount; Issuance of Escrow Receipts. The Escrow Agent hereby directs the Underwriters to, and the Underwriters hereby acknowledge that on the date hereof they shall,
irrevocably deliver to the Depositary on behalf of the Escrow Agent, an amount in U.S. dollars (“Dollars”) and immediately available funds equal to $112,606,000 for deposit on behalf of the Escrow Agent with the Depositary in
accordance with Section 2.1 of the Deposit Agreement. The Underwriters hereby instruct the Escrow Agent, upon receipt of such sum from the Underwriters, to confirm such receipt by executing and delivering to the Pass 
  

 3 

 [Escrow and Paying Agent Agreement (Class B)] 
  
 Through Trustee an Escrow Receipt in the form of Exhibit A hereto (an
“Escrow Receipt”), (a) to be affixed by the Pass Through Trustee to each Certificate and (b) to evidence the same percentage interest (the “Escrow Interest”) in the Account Amounts (as defined below) as
the Fractional Undivided Interest in the Pass Through Trust evidenced by the Certificate to which it is to be affixed. The Escrow Agent shall provide to the Pass Through Trustee for attachment to each Certificate newly issued under and in accordance
with the Pass Through Trust Agreement an executed Escrow Receipt as the Pass Through Trustee may from time to time request of the Escrow Agent. Each Escrow Receipt shall be registered by the Escrow Agent in a register (the
“Register”) maintained by the Escrow Agent in the name of the same holder that is the holder of the Certificate to which it is attached and may not thereafter be detached from such Certificate to which it is to be affixed prior to
the distribution of the Final Withdrawal (the “Final Distribution”). After the Final Distribution, no additional Escrow Receipts shall be issued and the Pass Through Trustee shall request the return to the Escrow Agent for
cancellation of all outstanding Escrow Receipts. 
 1.04. Payments to Receiptholders. All payments and distributions made
to holders of an Escrow Receipt (collectively “Receiptholders”) in respect of the Escrow Receipt shall be made only from amounts deposited in the Paying Agent Account (as defined below) (“Account Amounts”). Each
Receiptholder, by its acceptance of an Escrow Receipt, agrees that (a) it will look solely to the Account Amounts for any payment or distribution due to such Receiptholder pursuant to the terms of the Escrow Receipt and this Agreement (subject
to Section 15 hereof) and (b) it will have no recourse to United, the Pass Through Trustee, the Paying Agent, the Escrow Agent or Wilmington Trust Company, except as expressly provided herein or in the Pass Through Trust Agreement. No
Receiptholder shall have any right to vote or in any manner otherwise control the operation and management of the Paying Agent Account or the obligations of the parties hereto, nor shall anything set forth herein, or contained in the terms of the
Escrow Receipt, be construed so as to constitute the Receiptholders from time to time as partners or members of an association. 
 1.05. Mutilated, Destroyed, Lost or Stolen Escrow Receipt. If (a) any mutilated Escrow Receipt is surrendered to the Escrow Agent or the Escrow Agent receives evidence to its satisfaction of the destruction, loss or theft of any
Escrow Receipt and (b) there is delivered to the Escrow Agent and the Pass Through Trustee such security, indemnity or bond, as may be required by them to hold each of them harmless, then, absent notice to the Escrow Agent or the Pass Through
Trustee that such destroyed, lost or stolen Escrow Receipt has been acquired by a bona fide purchaser, and provided that the requirements of Section 8-405 of the Uniform Commercial Code in effect in any applicable jurisdiction are met, the
Escrow Agent shall execute, authenticate and deliver, in exchange for or in lieu of any such mutilated, destroyed, lost or stolen Escrow Receipt, a new Escrow Receipt or Escrow Receipts and of like Escrow Interest in the Account Amounts and bearing
a number not contemporaneously outstanding. 
 In connection with the issuance of any new Escrow Receipt under this
Section 1.05, the Escrow Agent may require the payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in relation thereto and any other expenses (including the fees and expenses of the Pass Through Trustee
and the Escrow Agent) connected therewith. 
  

 4 

 [Escrow and Paying Agent Agreement (Class B)] 
  
 Any duplicate Escrow Receipt issued pursuant to this
Section 1.05 shall constitute conclusive evidence of the appropriate Escrow Interest in the Account Amounts, as if originally issued, whether or not the lost, stolen or destroyed Escrow Receipt shall be found at any time. 
 The provisions of this Section are exclusive and shall preclude (to the extent lawful) all other rights and remedies with respect to
the replacement or payment of mutilated, destroyed, lost or stolen Escrow Receipts. 
 1.06. Additional Escrow Amounts.
On the date of any Financing Withdrawal, the Pass Through Trustee may re-deposit with the Depositary some or all of the amounts so withdrawn in accordance with Section 2.4 of the Deposit Agreement. 
 1.07. Resignation or Removal of Escrow Agent. Subject to the appointment and acceptance of a successor Escrow Agent as provided
below, the Escrow Agent may resign at any time by giving 30 days’ prior written notice thereof to the Investors, but may not otherwise be removed except for cause by the written consent of the Investors with respect to Investors representing
Escrow Interests aggregating not less than a majority in interest in the Account Amounts (an “Action of Investors”). Upon any such resignation or removal, the Investors, by an Action of Investors, shall have the right to appoint a
successor Escrow Agent. If no successor Escrow Agent shall have been so appointed and shall have accepted such appointment within 30 days after the retiring Escrow Agent’s giving of notice of resignation or the removal of the retiring Escrow
Agent, then the retiring Escrow Agent may appoint a successor Escrow Agent. Any successor Escrow Agent shall be a bank which has an office in the United States with a combined capital and surplus of at least $100,000,000. Upon the acceptance of any
appointment as Escrow Agent hereunder by a successor Escrow Agent, such successor Escrow Agent shall enter into such documents as the Pass Through Trustee shall require and shall thereupon succeed to and become vested with all the rights, powers,
privileges and duties of the retiring Escrow Agent, and the retiring Escrow Agent shall be discharged from its duties and obligations hereunder. No resignation or removal of the Escrow Agent shall be effective unless a written confirmation shall
have been obtained from each of Moody’s Investors Service, Inc. and Standard & Poor’s Ratings Services, a Standard & Poor’s Financial Services LLC business, that the replacement of the Escrow Agent with the successor
Escrow Agent will not result in (a) a reduction of the rating for the Certificates below the then current rating for the Certificates or (b) a withdrawal or suspension of the rating of the Certificates. 
 1.08. Persons Deemed Owners. Prior to due presentment of a Certificate for registration of transfer, the Escrow Agent and the Paying
Agent may treat the Person in whose name any Escrow Receipt is registered (as of the day of determination) as the owner of such Escrow Receipt for the purpose of receiving distributions pursuant to this Agreement and for all other purposes
whatsoever, and neither the Escrow Agent nor the Paying Agent shall be affected by any notice to the contrary. 
 1.09.
Further Assurances. The Escrow Agent agrees to take such actions, and execute such other documents, as may be reasonably requested by the Pass Through Trustee in order to effectuate the purposes of this Agreement and the performance by the
Escrow Agent of its obligations hereunder. 
  

 5 

 [Escrow and Paying Agent Agreement (Class B)] 
  
 Section 2. Paying Agent. 
 2.01. Appointment of Paying Agent. The Escrow Agent hereby irrevocably appoints and authorizes the Paying Agent to act as its paying
agent hereunder, for the benefit of the Investors, for such specific purposes and with such powers as are specifically delegated to the Paying Agent by the terms of this Agreement, together with such other powers as are reasonably incidental
thereto. Any and all money received and held by the Paying Agent under this Agreement or the Deposit Agreement shall be held in the Paying Agent Account for the benefit of the Investors. The Paying Agent (which term as used in this sentence shall
include reference to its affiliates and its own and its affiliates’ officers, directors, employees and agents): (a) shall have no duties or responsibilities except those expressly set forth in this Agreement, and shall not by reason of
this Agreement be a trustee for the Escrow Agent; (b) shall not be responsible to the Escrow Agent for any recitals, statements, representations or warranties of any person other than itself contained in this Agreement or for the failure by the
Escrow Agent or any other person or entity (other than the Paying Agent) to perform any of its obligations hereunder (whether or not the Paying Agent shall have any knowledge thereof); and (c) except in respect of its express obligations
hereunder, shall not be responsible for any action taken or omitted to be taken by it hereunder or provided for herein or in connection herewith, except for its own willful misconduct or gross negligence (or simple negligence in connection with the
handling of funds actually received by it in accordance with the terms of this Agreement). 
 2.02. Establishment of Paying
Agent Account. The Paying Agent shall establish a deposit account (the “Paying Agent Account”) at Wilmington Trust Company in the name of the Escrow Agent. It is expressly understood by the parties hereto that the Paying Agent
is acting as the paying agent of the Escrow Agent hereunder and that no amounts on deposit in the Paying Agent Account constitute part of the Trust Property. 
 2.03. Payments from Paying Agent Account. The Escrow Agent hereby irrevocably instructs the Paying Agent, and the Paying Agent agrees to act, as follows: 
 (a) Upon the confirmation by the Paying Agent of receipt in the Paying Agent Account from the Depositary of any amount in respect of the
Final Withdrawal, the Paying Agent shall forthwith distribute the entire amount of the Final Withdrawal deposited therein by the Depositary. There shall be so distributed to each Receiptholder of record on the 15th day (whether or not a Business
Day) preceding the Final Withdrawal Date by check mailed to such Receiptholder, at the address appearing in the Register, such Receiptholder’s pro rata share (based on the Escrow Interest in the Account Amounts held by such Receiptholder) of
the total amount in the Paying Agent Account on account of such Final Withdrawal, except that, with respect to Escrow Receipts registered on the Record Date in the name of The Depositary Trust Company “DTC”), such distribution shall
be made by wire transfer in immediately available funds to the account designated by DTC. 
 (b) If any payment of interest or
principal in respect of the Final Withdrawal is not received by the Paying Agent within five days of the applicable date when due, then it shall be distributed to Receiptholders after actual receipt by the Paying Agent on the same basis as a Special
Payment is distributed under the Pass Through Trust Agreement. 
  

 6 

 [Escrow and Paying Agent Agreement (Class B)] 
  
 (c) The Paying Agent shall include with any check mailed
pursuant to this Section any notice required to be distributed under the Pass Through Trust Agreement that is furnished to the Paying Agent by the Pass Through Trustee. 
 2.04. Withholding Taxes. The Paying Agent shall exclude and withhold from each distribution of accrued interest on the Deposits (as
defined in the Deposit Agreement) and any amount in respect of the Final Withdrawal any and all withholding taxes applicable thereto as required by law. The Paying Agent agrees to act as such withholding agent and, in connection therewith, whenever
any present or future taxes or similar charges are required to be withheld with respect to any amounts payable in respect of the Deposits (as defined in the Deposit Agreement) or the escrow amounts, to withhold such amounts and timely pay the same
to the appropriate authority in the name of and on behalf of the Receiptholders, that it will file any necessary withholding tax returns or statements when due, and that, as promptly as possible after the payment thereof, it will deliver to each
such Receiptholder appropriate documentation showing the payment thereof, together with such additional documentary evidence as such Receiptholder may reasonably request from time to time. The Paying Agent agrees to file any other information
reports as it may be required to file under United States law. 
 2.05. Resignation or Removal of Paying Agent. Subject
to the appointment and acceptance of a successor Paying Agent as provided below, the Paying Agent may resign at any time by giving 30 days’ prior written notice thereof to the Escrow Agent, but may not otherwise be removed except for cause by
the Escrow Agent. Upon any such resignation or removal, the Escrow Agent shall have the right to appoint a successor Paying Agent. If no successor Paying Agent shall have been so appointed and shall have accepted such appointment within 30 days
after the retiring Paying Agent’s giving of notice of resignation or the removal of the retiring Paying Agent, then the retiring Paying Agent may appoint a successor Paying Agent. Any successor Paying Agent shall be a bank which has an office
in the United States with a combined capital and surplus of at least $100,000,000. Upon the acceptance of any appointment as Paying Agent hereunder by a successor Paying Agent, such successor Paying Agent shall enter into such documents as the
Escrow Agent shall require and shall thereupon succeed to and become vested with all the rights, powers, privileges and duties of the retiring Paying Agent, and the retiring Paying Agent shall be discharged from its duties and obligations hereunder.

 2.06. Notice of Final Withdrawal. Promptly after receipt by the Paying Agent of notice that the Escrow Agent has
requested a Final Withdrawal or that a Final Withdrawal will be made, the Paying Agent shall cause notice of the distribution of such Final Withdrawal to be mailed to each of the Receiptholders at its address as it appears in the Register. Such
notice shall be mailed not less than 15 days prior to the Final Withdrawal Date. Such notice shall set forth: 
 (i) the Final Withdrawal Date and the date for determining Receiptholders of record who shall be entitled to receive distributions in respect of such Final Withdrawal, 
 (ii) the amount of the payment in respect of such Final Withdrawal for each $1,000 face amount Certificate (based on
information provided by the Pass Through Trustee) and the amount thereof constituting unused Deposits (as defined in the Deposit Agreement) and interest thereon, and 
  

 7 

 [Escrow and Paying Agent Agreement (Class B)] 
  
 (iii) if the Final Withdrawal Date is the same
date as a Regular Distribution Date, the total amount to be received on such date for each $1,000 face amount Certificate (based on information provided by the Pass Through Trustee). 
 Such mailing may include any notice required to be given to Certificateholders in connection with such distribution pursuant to the Pass
Through Trust Agreement. 
 Section 3. Payments. If, notwithstanding the instructions in Section 4 of
the Deposit Agreement that all amounts payable to the Escrow Agent under the Deposit Agreement be paid by the Depositary directly to the Paying Agent or the Pass Through Trustee or a Replacement Depositary (depending on the circumstances), the
Escrow Agent receives any payment thereunder, then the Escrow Agent shall forthwith pay such amount in Dollars and in immediately available funds by wire transfer to (a) in the case of any Final Withdrawal, directly to the Paying Agent Account,
(b) in the case of any Financing Withdrawal, directly to the Pass Through Trustee or its designee as specified and in the manner provided in the Applicable Notice of Financing Withdrawal and (c) in the case of any Replacement Withdrawal,
to the Replacement Depositary as provided in the Replacement Depositary Agreement. The Escrow Agent hereby waives any and all rights of set-off, combination of accounts, right of retention or similar right (whether arising under applicable law,
contract or otherwise) it may have against amounts payable to the Paying Agent howsoever arising. 
 Section 4.
Other Actions. The Escrow Agent shall take such other actions under or in respect of the Deposit Agreement (including, without limitation, the enforcement of the obligations of the Depositary thereunder) as the Investors, by an Action of
Investors, may from time to time request. 
 Section 5. Representations and Warranties of the Escrow Agent.
The Escrow Agent represents and warrants to United, the Investors, the Paying Agent and the Pass Through Trustee as follows: 
 (i) it is a banking corporation duly organized and validly existing in good standing under the laws of the State of Delaware; 
 (ii) it has full power, authority and legal right to conduct its business and operations as currently conducted and to enter
into and perform its obligations under this Agreement, the Deposit Agreement and any Replacement Deposit Agreement; 
 (iii) the execution, delivery and performance of each of this Agreement, the Deposit Agreement and any Replacement Deposit Agreement have been duly authorized by all necessary corporate action on the part of it and do not require any
stockholder approval, or approval or consent of any trustee or holder of any indebtedness or obligations of it, and each such document (other than a Replacement Deposit Agreement) has been duly executed and delivered by it and constitutes its legal,
valid and binding obligations enforceable against it in accordance with the terms hereof or thereof except as such enforceability may be limited by bankruptcy, insolvency, moratorium, reorganization or other similar laws or equitable principles of
general application to or affecting the enforcement of creditors’ rights generally (regardless of whether such enforceability is considered in a proceeding in equity or at law); 
  

 8 

 [Escrow and Paying Agent Agreement (Class B)] 
  
 (iv) no authorization, consent or approval of or
other action by, and no notice to or filing with, any United States federal or state of Delaware governmental authority or regulatory body is required for the execution, delivery or performance by it of this Agreement or the Deposit Agreement or any
Replacement Deposit Agreement; 
 (v) neither the execution, delivery or performance by it of this Agreement or
the Deposit Agreement or any Replacement Deposit Agreement, nor compliance with the terms and provisions hereof or thereof, conflicts or will conflict with or results or will result in a breach or violation of any of the terms, conditions or
provisions of, or will require any consent or approval under, any law, governmental rule or regulation or the charter documents, as amended, or bylaws, as amended, of it or any similar instrument binding on it or any order, writ, injunction or
decree of any court or governmental authority against it or by which it or any of its properties is bound or any indenture, mortgage or contract or other agreement or instrument to which it is a party or by which it or any of its properties is
bound, or constitutes or will constitute a default thereunder or results or will result in the imposition of any lien upon any of its properties; and 
 (vi) there are no pending or, to its knowledge, threatened actions, suits, investigations or proceedings (whether or not purportedly on behalf of it) against or affecting it or any of its property before
or by any court or administrative agency which, if adversely determined, (A) would adversely affect the ability of it to perform its obligations under this Agreement or the Deposit Agreement or any Replacement Deposit Agreement or
(B) would call into question or challenge the validity of this Agreement or the Deposit Agreement or the enforceability hereof or thereof in accordance with the terms hereof or thereof, nor is the Escrow Agent in default with respect to any
order of any court, governmental authority, arbitration board or administrative agency so as to adversely affect its ability to perform its obligations under this Agreement or the Deposit Agreement. 
 Section 6. Representations and Warranties of the Paying Agent. The Paying Agent represents and warrants to United, the
Investors, the Escrow Agent and the Pass Through Trustee as follows: 
 (i) it is a banking corporation duly
organized and validly existing in good standing under the laws of the State of Delaware; 
 (ii) it has full
power, authority and legal right to conduct its business and operations as currently conducted and to enter into and perform its obligations under this Agreement; 
 (iii) the execution, delivery and performance of this Agreement has been duly authorized by all necessary corporate action on
the part of it and does not require any stockholder approval, or approval or consent of any trustee or holder of any 
  

 9 

 [Escrow and Paying Agent Agreement (Class B)] 
  
 indebtedness or obligations of it, and such document has been
duly executed and delivered by it and constitutes its legal, valid and binding obligations enforceable against it in accordance with the terms hereof except as such enforceability may be limited by bankruptcy, insolvency, moratorium, reorganization
or other similar laws or equitable principles of general application to or affecting the enforcement of creditors’ rights generally (regardless of whether such enforceability is considered in a proceeding in equity or at law); 
 (iv) no authorization, consent or approval of or other action by, and no notice to or filing with, any United States federal
or state of Delaware governmental authority or regulatory body is required for the execution, delivery or performance by it of this Agreement; 
 (v) neither the execution, delivery or performance by it of this Agreement, nor compliance with the terms and provisions hereof, conflicts or will conflict with or results or will result in a breach or
violation of any of the terms, conditions or provisions of, or will require any consent or approval under, any law, governmental rule or regulation or the charter documents, as amended, or bylaws, as amended, of it or any similar instrument binding
on it or any order, writ, injunction or decree of any court or governmental authority against it or by which it or any of its properties is bound or any indenture, mortgage or contract or other agreement or instrument to which it is a party or by
which it or any of its properties is bound, or constitutes or will constitute a default thereunder or results or will result in the imposition of any lien upon any of its properties; and 
 (vi) there are no pending or, to its knowledge, threatened actions, suits, investigations or proceedings (whether or not
purportedly on behalf of it) against or affecting it or any of its property before or by any court or administrative agency which, if adversely determined, (A) would adversely affect the ability of it to perform its obligations under this
Agreement or (B) would call into question or challenge the validity of this Agreement or the enforceability hereof in accordance with the terms hereof, nor is the Paying Agent in default with respect to any order of any court, governmental
authority, arbitration board or administrative agency so as to adversely affect its ability to perform its obligations under this Agreement. 
 Section 7. Indemnification. Except for actions expressly required of the Escrow Agent or the Paying Agent hereunder, each of the Escrow Agent and the Paying Agent shall in all cases be
fully justified in failing or refusing to act hereunder unless it shall have been indemnified (both in such capacities and individually) by the party requesting such action in a manner reasonably satisfactory to it against any and all liability and
expense which may be incurred by it by reason of taking or continuing to take any such action. In the event United requests any amendment to any Operative Agreement (as defined in the Note Purchase Agreement), the Pass Through Trustee agrees to pay
all reasonable fees and expenses (including, without limitation, fees and disbursements of counsel) of the Escrow Agent and the Paying Agent in connection therewith. 
  

 10 

 [Escrow and Paying Agent Agreement (Class B)] 
  
 Section 8. Amendment, Etc. Upon request of
the Pass Through Trustee and approval by an Action of Investors, the Escrow Agent and Paying Agent shall enter into an amendment to this Agreement, so long as such amendment does not adversely affect the rights or obligations of the Escrow Agent or
the Paying Agent, provided that upon request of the Pass Through Trustee and without any consent of the Investors, the Escrow Agent and Paying Agent shall enter into an amendment to this Agreement for any of the following purposes:

 (1) to correct or supplement any provision in this Agreement which may be defective or inconsistent with any
other provision herein or to cure any ambiguity or correct any mistake or to modify any other provision with respect to matters or questions arising under this Agreement, provided that any such action shall not materially adversely affect the
interests of the Investors; or 
 (2) to comply with any requirement of the SEC, applicable law, rules or
regulations of any exchange or quotation system on which the Certificates are listed or any regulatory body; or 
 (3) to evidence and provide for the acceptance of appointment under this Agreement of a successor Escrow Agent, successor Paying Agent or successor Pass Through Trustee. 
 Section 9. Notices. Unless otherwise expressly provided herein, any notice or other communication under this Agreement
shall be in writing (including by facsimile) and shall be deemed to be given and effective upon receipt thereof (or, if received outside of business hours, at the opening of business on the next Business Day). All notices shall be sent to
(a) in the case of the Investors, as their respective addresses shall appear in the Register, (b) in the case of the Escrow Agent, Wilmington Trust Company, 1100 North Market Street, Wilmington, Delaware 19890-0001, Attention: Corporate
Capital Market Services (Telecopier: 302-636-4140), (c) in the case of the Pass Through Trustee, Wilmington Trust Company, 1100 North Market Street, Wilmington, Delaware 19890-0001, Attention: Corporate Capital Market Services (Telecopier:
302-636-4140), or (d) in the case of the Paying Agent, Wilmington Trust Company, 1100 North Market Street, Wilmington, Delaware 19890-0001, Attention: Corporate Capital Market Services (Telecopier: 302-636-4140), in each case with a copy to
United, United Air Lines, Inc., 77 West Wacker Drive, Chicago, IL 60601, Attention: Stephen R. Lieberman, Vice President and Treasurer (Telecopier: 312-997-8333) with a copy to: United Air Lines, Inc., 77 West Wacker Drive, Chicago, IL 60601,
Attention: General Counsel (Telecopier: 312-997-8333) (or at such other address as any such party may specify from time to time in a written notice to the other parties). On or prior to the execution of this Agreement, the Pass Through Trustee has
delivered to the Escrow Agent a certificate containing specimen signatures of the representatives of the Pass Through Trustee who are authorized to give notices and instructions with respect to this Agreement. The Escrow Agent may conclusively rely
on such certificate until the Escrow Agent receives written notice from the Pass Through Trustee to the contrary. 
 The Escrow
Agent shall notify the Receiptholders in the event of a default in the payment of any Final Withdrawal in accordance with the terms of the Deposit Agreement and this Agreement and shall promptly forward to Receiptholders upon receipt copies of all
written communications relating to any payments due to the Receiptholders in respect of the Deposits. 
  

 11 

 [Escrow and Paying Agent Agreement (Class B)] 
  
 Section 10. Transfer. No party hereto shall
be entitled to assign or otherwise transfer this Agreement (or any interest herein) other than (in the case of the Escrow Agent) to a successor escrow agent under Section 1.07 hereof or (in the case of the Paying Agent) to a successor paying
agent under Section 2.05 hereof, and any purported assignment in violation thereof shall be void. This Agreement shall be binding upon the parties hereto and their respective successors and (in the case of the Escrow Agent and the Paying Agent)
their respective permitted assigns. Upon the occurrence of the Transfer (as defined below) contemplated by the Assignment and Assumption Agreement (as defined below), the Pass Through Trustee shall (without further act) be deemed to have transferred
all of its right, title and interest in and to this Agreement to the trustee of the Successor Trust (as defined below) and, thereafter, the trustee of the Successor Trust shall be deemed to be the “Pass Through Trustee” hereunder
with the rights and obligations of the “Pass Through Trustee” hereunder and each reference herein to “United Air Lines Pass Through Trust “2009-2B-O” shall be deemed to be a reference to “United Air Lines Pass Through
Trust 2009-2B-S”. The parties hereto hereby acknowledge and consent to the Transfer contemplated by the Assignment and Assumption Agreement. As used herein, “Transfer” means the transfers of the assets to the Successor Trust
contemplated by the Assignment and Assumption Agreement; “Assignment and Assumption Agreement” means the Assignment and Assumption Agreement to be entered into between the Pass Through Trustee and the trustee of the Successor Trust;
“Successor Trust” means the United Air Lines Pass Through Trust 2009-2B-S. 
 Section 11. Entire
Agreement. This Agreement sets forth all of the promises, covenants, agreements, conditions and understandings among the Escrow Agent, the Paying Agent, the Underwriters and the Pass Through Trustee with respect to the subject matter hereof, and
supersedes all prior and contemporaneous agreements and undertakings, inducements or conditions, express or implied, oral or written. 
 Section 12. Governing Law. This Agreement shall be governed by, and construed in accordance with, the laws of the State of New York (without regard to principles of conflicts of laws thereof (other than
Section 5-1401 and Section 5-1402 of the New York General Obligations Law)). 
 Section 13. Waiver of
Jury Trial Right. EACH OF THE ESCROW AGENT, THE PAYING AGENT, THE INVESTORS AND THE PASS THROUGH TRUSTEE ACKNOWLEDGES AND ACCEPTS THAT IN ANY SUIT, ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS AGREEMENT SUCH PARTY IRREVOCABLY
WAIVES ITS RIGHT TO A TRIAL BY JURY. 
 Section 14. Counterparts. This Agreement may be executed in one
or more counterparts, all of which taken together shall constitute one instrument. 
 Section 15. Rights of
Holders. Each Receiptholder shall have the right (individually and without the need for any other action of any Person, including the Escrow Agent or any other Receiptholder), upon any default in the payment of the Final Withdrawal when due by
the Depositary in accordance with the terms of the Deposit Agreement and this Agreement, (i) to proceed directly against the Depositary by making a demand to the Depositary for the portion of such payment that would have been distributed to
such Receiptholder pursuant to this Agreement or by bringing suit to enforce payment of such portion and (ii) to enforce any other rights 
  

 12 

 [Escrow and Paying Agent Agreement (Class B)] 
  
 that the Escrow Agent may have in respect of amounts due from the Depositary
under the Deposit Agreement and this Agreement that would have been distributed to such Receiptholder pursuant to this Agreement. Any recovery on such enforcement action shall belong solely to the Receiptholder who brought such action, and not
to the Escrow Agent or any other Receiptholder individually or to Receiptholders as a group. 
 *         *         * 
  

 13 

 [Escrow and Paying Agent Agreement (Class B)] 
  
 IN WITNESS WHEREOF, the Escrow Agent, the Paying Agent,
the Underwriters and the Pass Through Trustee have caused this Escrow and Paying Agent Agreement (Class B) to be duly executed as of the day and year first above written. 
  

			
	WILMINGTON TRUST COMPANY, as
 Escrow
Agent

		
	By:	 	  

	Name:
	 	
	Title:	 	
	
	MORGAN STANLEY & CO.
 INCORPORATED,
J.P. MORGAN
 SECURITIES INC. and 
 GOLDMAN, SACHS & CO., 
 as Representatives of the several
Underwriters

		
	By:	 	  

	Name:	 	
	Title:	 	
		
	By:	 	  

	Name:
	 	
	Title:	 	
		
	By:	 	  

		 	 (Goldman, Sachs & Co.)

	
	WILMINGTON TRUST COMPANY, not in its individual capacity, but solely as Pass Through Trustee for and on behalf of United Air Lines Pass Through Trust 2009-2B-O

		
	By:	 	  

	Name:
	 	
	Title:
	 	
	
	WILMINGTON TRUST COMPANY, as
 Paying
Agent

		
	By:	 	  

	Name:	 	
	Title:	 	

  

 14 

 [Escrow and Paying Agent Agreement (Class B)] 
  
 EXHIBIT A 
 UNITED AIR LINES 2009-2B-O ESCROW RECEIPT 
 No.             
 This Escrow Receipt evidences a fractional undivided interest in amounts (“Account Amounts”) from time to time deposited into a certain paying agent account (the “Paying Agent Account”) described in the
Escrow and Paying Agent Agreement (Class B) dated as of November 24, 2009 (as amended, modified or supplemented from time to time, the “Escrow and Paying Agent Agreement”) among Wilmington Trust Company, as Escrow Agent (in
such capacity, together with its successors in such capacity, the “Escrow Agent”), Morgan Stanley & Co. Incorporated, J.P. Morgan Securities Inc. and Goldman, Sachs & Co., as representatives of the several
Underwriters, Wilmington Trust Company, as Pass Through Trustee (in such capacity, together with its successors in such capacity, the “Pass Through Trustee”) and Wilmington Trust Company, as paying agent (in such capacity, together
with its successors in such capacity, the “Paying Agent”). Capitalized terms not defined herein shall have the meanings assigned to them in the Escrow and Paying Agent Agreement. 
 This Escrow Receipt is issued under and is subject to the terms, provisions and conditions of the Escrow and Paying Agent Agreement. By
virtue of its acceptance hereof the holder of this Escrow Receipt assents and agrees to be bound by the provisions of the Escrow and Paying Agent Agreement and this Escrow Receipt. 
 This Escrow Receipt represents a fractional undivided interest in amounts deposited from time to time in the Paying Agent Account, and
grants or represents no rights, benefits or interests of any kind in respect of any assets or property other than such amounts. This Escrow Receipt evidences the same percentage interest in the Account Amounts as the Fractional Undivided Interest in
the Pass Through Trust evidenced by the Certificate to which this Escrow Receipt is affixed. 
 All payments and distributions
made to Receiptholders in respect of the Escrow Receipt shall be made only from Account Amounts deposited in the Paying Agent Account. The holder of this Escrow Receipt, by its acceptance of this Escrow Receipt, agrees that it will look solely to
the Account Amounts for any payment or distribution due to it pursuant to this Escrow Receipt (or, in case the Depositary shall default in its obligation to make a payment under the Deposit Agreement that would be an Account Amount, to the
Depositary) and that it will not have any recourse to United, the Pass Through Trustee, the Paying Agent or the Escrow Agent, except as expressly provided herein or in the Pass Through Trust Agreement. No Receiptholder of this Escrow Receipt shall
have any right to vote or in any manner otherwise control the operation and management of the Paying Agent Account, nor shall anything set forth herein, or contained in the terms of this Escrow Receipt, be construed so as to constitute the
Receiptholders from time to time as partners or members of an association. 
 This Escrow Receipt may not be assigned or
transferred except in connection with the assignment or transfer of the Certificate to which this Escrow Receipt is affixed. After payment to the holder hereof of its Escrow Interest in the Final Distribution, upon the request of the Pass Through
Trustee, the holder hereof will return this Escrow Receipt to the Pass Through Trustee. 
  

 EXHIBIT A 
 Page 1 

 [Escrow and Paying Agent Agreement (Class B)] 
  
 The Paying Agent may treat the person in whose name the
Certificate to which this Escrow Receipt is attached as the owner hereof for all purposes, and the Paying Agent shall not be affected by any notice to the contrary. 
 THIS ESCROW RECEIPT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK (WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAWS THEREOF (OTHER THAN SECTION 5-1401 AND 5-1402
OF THE NEW YORK GENERAL OBLIGATIONS LAW)). 
 *        
*         * 
  

 EXHIBIT A 
 Page 2 

 [Escrow and Paying Agent Agreement (Class B)] 
  
 IN WITNESS WHEREOF, the Escrow Agent has caused this
Escrow Receipt to be duly executed. 
 Dated:             , 2009 

 

			
	WILMINGTON TRUST COMPANY, as
 Escrow
Agent

		
	By:	 	  

	Name:
	 	
	Title:
	 	

  
  

 EXHIBIT A 
 Page 3 

 [Escrow and Paying Agent Agreement (Class B)] 
  
 EXHIBIT B 
 WITHDRAWAL CERTIFICATE 
 (Class B) 
 WILMINGTON TRUST COMPANY, 
 as Escrow Agent 
 Dear Sirs: 
 Reference is made to the Escrow and Paying Agent Agreement, dated as of November 24, 2009 (the “Agreement”). [We hereby
certify to you that the conditions to the obligations of the undersigned to execute a Participation Agreement pursuant to the Note Purchase Agreement have been satisfied] [We hereby notify you that the Depositary is being replaced in accordance with
Section 4(a)(iii) of the Note Purchase Agreement]. Pursuant to Section 1.02(c) of the Agreement, please execute the attached Notice of Financing Withdrawal [Notice of Replacement Withdrawal] and immediately transmit by facsimile to the
Depositary, at [                    ], Attention:
[                    ] – Americas. 
  

			
	 Very truly yours,

	
	WILMINGTON TRUST COMPANY, not in its individual capacity but solely as Pass Through Trustee
		
	By:	 	  

	Name:	 	
	Title:	 	

 Dated:             ,
200     
  
  

 EXHIBIT B 
 Page 1

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