This copy of the document filed as an Exhibit excludes certain identified information because such information is both (i) not material and (ii) would likely cause competitive harm if publicly disclosed. Omissions are designated by the symbol […***…]. The Boeing Company P.O. Box 3707 Seattle, WA 98124 2207 Page 1 BOEING PROPRIETARY WJE-PA-05130-LA-2103923 Allegiant Air, LLC 1201 N. Town Center Drive Las Vegas, NV 89144 Subject: […***…] Reference: Purchase Agreement No. PA-05130 (Purchase Agreement) between The Boeing Company (Boeing) and Allegiant Air, LLC (Customer) relating to model 737-8-200 and model 737-7 aircraft (each or collectively, Aircraft) This letter agreement (Letter Agreement) amends and supplements the Purchase Agreement. […***…]. All terms used but not defined in this Letter Agreement have the same meaning as in the Purchase Agreement. 1. […***…]. This Program applies to any […***…] at the time of delivery that […***…] with Boeing-designed corrective materials to comply with (i) […***…] or (ii) […***…]. 2. […***…]. The term of the Program […***…] after delivery of each Aircraft […***…]. 3. […***…]. 3.1 […***…] required to […***…] by Boeing to Customer […***…] (including […***…]. 3.2 […***…] in the Aircraft that Boeing is required to provide to Customer […***…]. 4. General Conditions and Limitations. 4.1 Customer's written notice of Customer’s intent to make a claim under this Program must be received by Boeing’s Warranties Regional Manager […***…].

WJE-PA-05130-LA-2103923 Page 2 BOEING PROPRIETARY 4.2 THE DISCLAIMER AND RELEASE and EXCLUSION OF CONSEQUENTIAL AND OTHER DAMAGES provisions stated in Article 11 of Part 2 of Exhibit C of the AGTA apply to this Program. 5. Assignment. Notwithstanding any other provisions of the Purchase Agreement to the contrary, the rights and obligations described in this Letter Agreement are provided to Customer in consideration of Customer becoming the operator of the Aircraft and cannot be assigned, in whole or in part, without the prior written consent of Boeing. Nothing in this statement is intended to support imply the actual or potential the recovery from Allegiant of any benefits supplied hereunder for Boeing Product installed in an Aircraft. 6. Confidentiality. The information contained herein represents confidential business information and has value precisely because it is not available generally or to other parties. Customer will limit the disclosure of its contents to each of Customer and Customer affiliates’ employees, officers and directors, legal counsel, professional advisors and auditors, 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 unless disclosure is required by applicable law or court order, in which case, Customer shall (i) notify Boeing in writing of such disclosure requirement or request prior to making such disclosure, and will take steps to protect the information contained herein, and (ii) use reasonable efforts to obtain redaction and confidential treatment for the disclosed information or parts thereof. In addition, with respect to disclosure of the contents hereof to third parties who may be or are involved with financing (in any form, including sale and lease-back) of Aircraft (and/or Advance Payments) under the Purchase Agreement, Customer shall be entitled to disclose such information to such third party financiers, after consultation with Boeing, as the parties shall mutually agree (each acting reasonably and within industry and financing norms). If the foregoing correctly sets forth your understanding of our agreement with respect to the matters contained herein, please indicate your acceptance and approval below.

WJE-PA-05130-LA-2103923 Page 3 BOEING PROPRIETARY ACCEPTED AND AGREED TO this Date: ALLEGIANT AIR, LLC THE BOEING COMPANY By: By: Name: Name: […***…] Title: Title: Attorney-In-Fact