Exhibit 32.1

CERTIFICATIONS OF PRINCIPAL EXECUTIVE OFFICER AND PRINCIPAL FINANCIAL OFFICER

PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The following certifications are hereby made in connection with the Quarterly Report on Form 10-Q of Harbor Diversified, Inc. (the “Company”) for the period ended June 30, 2024, as filed with the Securities and Exchange Commission on the date hereof (the “Report”):

I, Christine R. Deister, Principal Executive Officer of the Company, hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge, (i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of the dates and for the periods presented.


Date: April 11, 2025	By:	/s/ Christine R. Deister
		Christine R. Deister
		Chief Executive Officer and Secretary
		Harbor Diversified, Inc.
		(Principal Executive Officer)

I, Liam Mackay, Principal Financial Officer of Air Wisconsin Airlines LLC, hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge, (i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of the dates and for the periods presented.


Date: April 11, 2025	By:	/s/ Liam Mackay
		Liam Mackay
		Chief Financial Officer
		Air Wisconsin Airlines LLC
		(Principal Financial Officer)

HARBOR DIVERSIFIED, INC. 10-Q