Supplemental Letter Agreement No. 6-1162-CJM-039, to Purchase Agreement No. 3729, dated December 13, 2011, between The Boeing Company and the Company

Subject: [***]

Reference: Purchase Agreement No. PA-03729 (Purchase Agreement) between The Boeing Company (Boeing) and Southwest Airlines Co. (Customer) relating to Model 737-8 aircraft (Aircraft), specifically letter agreement LA-1210419 [***] (Letter Agreement).

        This letter is to provide a variance to the referenced Letter Agreement to provide [***] All terms used but not defined in this letter shall have the same meaning as in the Purchase Agreement or the CSGTA.

1.[***]

        

        Notwithstanding the terms outlined in Article 1 of the reference Letter Agreement, Boeing will provide Customer [***]

2.Confidentiality.

Customer understands and agrees that the information contained herein represents confidential business information and has value precisely because it is not available generally or to other parties. Customer agrees to limit the disclosure of its contents to employees of Customer with a need to know the contents for purposes of

helping Customer perform its obligations under the Purchase Agreement and who understand they are not to disclose its contents to any other person or entity without the prior written consent of Boeing.

Very truly yours,