U.S. Xpress Enterprises (USX) 10-Q 2005 Q2 Quarterly report

EXHIBIT 32.2

CERTIFICATION 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 U.S. Xpress Enterprises, Inc. (the “Company”) on Form 10-Q for the three months ending June 30, 2005 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned hereby certifies, pursuant to 18 U.S.C. § 1350 (as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002) that he is the Chief Financial Officer of the Company and that: (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.

/s/ Ray M. Harlin

Ray M. Harlin

Executive Vice President and

Chief Financial Officer

Date: August 9, 2005