Exhibit No. 32.2

CERTIFICATION OF

PRINCIPAL FINANCIAL OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Heartland Express, Inc. (the "Company"), on Form 10-Q for the period ended March 31, 2024 (the "Report"), filed with the Securities and Exchange Commission, I, Christopher A. Strain, Vice President-Finance, Treasurer and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:
1.	The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and
2.	The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	May 10, 2024	By:	/s/ Christopher A. Strain
			Christopher A. Strain
			Vice President-Finance, Treasurer
			and Chief Financial Officer