Joinder Agreement to the Payroll Support Program Agreement, dated April 23, 2020, between Horizon Air Industries, Inc. and the United States Department of the Treasury

This JOINDER AGREEMENT, dated as of April 22, 2020 (this “Joinder”), is delivered in connection with the Payroll Support Program Agreement, dated as of April 22, 2020 (as amended from time to time, the “PSP Agreement”) between Alaska Airlines, Inc., an Alaska corporation, and the United States Department of the Treasury (“Treasury”). All capitalized terms not defined herein have the meanings set forth in the PSP Agreement.

1.Joinder as a Recipient. The undersigned hereby (a) agrees that it shall be deemed a Recipient under the PSP Agreement, (b) agrees to perform all of the obligations of a Recipient thereunder, and (c) agrees to comply with the terms thereof applicable to Recipients as if it were a signatory thereto.

2.Unconditional Joinder. The undersigned acknowledges that its obligations under this Joinder are unconditional.

3.Reliance. The undersigned hereby acknowledges that Treasury executed the PSP Agreement in reliance on this Joinder and may reduce the amount of Payroll Support thereunder if the undersigned does not comply with the terms of the PSP Agreement.

4.Incorporation by Reference. All terms and conditions of the PSP Agreement are hereby incorporated by reference into this Joinder as if set forth in full.

IN WITNESS WHEREOF, the undersigned has duly executed and delivered this Joinder as of the date first written above.