SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 8-K
                                 CURRENT REPORT
                       Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934

        Date of Report (Date of earliest event reported): April 16, 2003

                           KNIGHT TRANSPORTATION, INC.
             (Exact name of registrant as specified in its charter)


           Arizona                    000-24946                  86-0649974
(State or other jurisdiction   (Commission File Number)       (I.R.S. Employer
      of incorporation)                                      Identification No.)


           5601 W. Buckeye Road, Phoenix, Arizona           85043
          (Address of principal executive offices)        (Zip Code)


               Registrant's telephone number, including area code:
                                 (602) 269-2000


                                 Not applicable
          (Former name or former address, if changed since last report)

ITEM 1. CHANGES IN CONTROL OF REGISTRANT

     Not applicable.

ITEM 2. ACQUISITION OR DISPOSITION OF ASSETS

     Not applicable.

ITEM 3. BANKRUPTCY OR RECEIVERSHIP

     Not applicable.

ITEM 4. CHANGES IN REGISTRANT'S CERTIFYING ACCOUNTANT

     Not applicable.

ITEM 5. OTHER EVENTS AND REGULATION FD DISCLOSURE

     Not applicable.

ITEM 6. RESIGNATIONS OF REGISTRANT'S DIRECTORS

     Not applicable.

ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS

     (c)  Exhibits.

         EXHIBIT
         NUMBER            EXHIBIT TITLE
         ------            -------------
          99.1      Knight Transportation, Inc. press release announcing
                    financial results for the quarter ended March 31, 2003

ITEM 8. CHANGE IN FISCAL YEAR

     Not applicable.

ITEM 9. REGULATION FD DISCLOSURE

     The   following   information   regarding   the  press  release  of  Knight
Transportation,  Inc. (the "Company")  announcing its financial  results for the
first  quarter  ended March 31, 2003 is intended to be furnished  under Item 12,
"Results of Operations and Financial  Condition," but is instead being furnished
pursuant  to  Item 9 in  accordance  with  the  interim  guidance  contained  in
Securities Exchange Commission Release No. 33-8216. The information contained in
this report and the exhibit  hereto shall not be deemed  "filed" for purposes of
Section 18 of the  Securities  Exchange Act of 1934,  as amended (the  "Exchange
Act"),  or  incorporated  by reference in any filing under the Securities Act of
1933, as amended, or the Exchange Act, except as shall be expressly set forth by
specific reference in such a filing.

     On April 16, 2003, the Company issued a press release (the "Earnings  Press
Release") announcing its financial results for the first quarter ended March 31,
2003. A copy of the Earnings Press Release is attached to this report as Exhibit
99.1.

     On April 17,  2003,  the  Company  held a  conference  call to discuss  the
Earnings Press Release.  During the call,  Chief Executive  Officer Kevin Knight
commented on the earnings per share  forecasts  published by investment  banking
analysts for the quarter ending June 30, 2003, and the year ending  December 31,
2003.  The  Company  believes  the mean  estimates  (based on the ten  published
forecasts published on Nasdaq Online at April 16, 2003) were $0.21 per share for
the  quarter  ending  June 30,  2003,  and $0.87  per share for the year  ending
December  31,  2003.  Mr.  Knight  stated  management's  belief  that those mean
estimates are reasonably achievable.

     THE INFORMATION HEREIN AND THE STATEMENTS BY COMPANY REPRESENTATIVES DURING
THE CONFERENCE CALL CONTAIN "FORWARD-LOOKING  STATEMENTS" THAT ARE MADE PURSUANT
TO THE SAFE-HARBOR PROVISIONS OF THE PRIVATE SECURITIES LITIGATION REFORM ACT OF
1995 AND  OTHERWISE  MAY BE  PROTECTED.  SUCH  STATEMENTS  ARE MADE BASED ON THE
CURRENT BELIEFS AND EXPECTATIONS OF THE COMPANY'S  MANAGEMENT AND ARE SUBJECT TO
SIGNIFICANT  RISKS AND  UNCERTAINTIES.  ACTUAL  RESULTS  MAY  DIFFER  FROM THOSE
ANTICIPATED BY FORWARD-LOOKING STATEMENTS.  PLEASE REFER TO THE COMPANY'S ANNUAL
REPORT  ON FORM  10-K  AND  OTHER  FILINGS  WITH  THE  SECURITIES  AND  EXCHANGE
COMMISSION FOR INFORMATION  CONCERNING  RISKS,  UNCERTAINTIES  AND OTHER FACTORS
THAT MAY AFFECT FUTURE RESULTS.

                                    SIGNATURE

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.


                                        KNIGHT TRANSPORTATION, INC.


Date: April 18, 2003                    /s/ Timothy M. Kohl
                                        ----------------------------------------
                                        Timothy M. Kohl
                                        Executive Vice President, Secretary, and
                                        Chief Financial Officer

                                  EXHIBIT INDEX

99.1      Knight Transportation, Inc. press release announcing financial results
          for the quarter ended March 31, 2003