Reaffirmation Agreement to Collateral Agency Agreement among Gogo Inc. and Affiliates, U.S. Bank National Association, and Others (May 7, 2019)

Exhibit 10.8.17

EXECUTION VERSION

REAFFIRMATION AGREEMENT

Reference is made to the Collateral Agency Agreement dated as of April 25, 2019 (as amended, supplemented, amended and restated or otherwise modified and in effect from time to time, the “Collateral Agency Agreement”) among Gogo Inc., a Delaware corporation (the “Parent”), Gogo Intermediate Holdings LLC, a Delaware limited liability company (the “Company”), Gogo Finance Co. Inc., a Delaware corporation (the “Co-Issuer” and, together with the Company, the “Issuers”), the other Grantors from time to time party thereto, U.S. Bank National Association, as Trustee under the Indenture (as defined therein) and U.S. Bank National Association, as Collateral Agent. Capitalized terms used but not otherwise defined herein have the meanings assigned to them in the Collateral Agency Agreement. This Reaffirmation Agreement is being executed and delivered as of May 7, 2019 in connection with an Additional Secured Debt Designation of even date herewith which Additional Secured Debt Designation has designated additional secured debt as Priority Lien Debt (as described therein) entitled to the benefit of the Collateral Agency Agreement.

Each of the undersigned hereby consents to the designation of additional secured debt as Priority Lien Debt as set forth in the Additional Secured Debt Designation of even date herewith and hereby confirms its respective guarantees, pledges, grants of security interests and other obligations, as applicable, under and subject to the terms of each of the Priority Lien Documents to which it is party, and agrees that, notwithstanding the designation of such additional indebtedness or any of the transactions contemplated thereby, such guarantees, pledges, grants of security interests and other obligations, and the terms of each Priority Lien Document to which it is a party, are not impaired or adversely affected in any manner whatsoever and shall continue to be in full force and effect and such additional secured debt shall be entitled to all of the benefits of such Priority Lien Documents.

Governing Law and Miscellaneous Provisions. The provisions of Article 7 of the Collateral Agency Agreement will apply with like effect to this Reaffirmation Agreement.

[signature pages follow]

IN WITNESS WHEREOF, each of the undersigned has caused this Reaffirmation Agreement to be duly executed as of the date written above.

[Signature page to Reaffirmation Agreement]

[Signature page to Reaffirmation Agreement]