FOR IMMEDIATE RELEASE Contact: Dave Thomas, VP Marketing and Planning

       (307) 432-7000

Great Lakes Airlines To Add Additional Flights Between Dickinson, North Dakota and Denver, Colorado Beginning June 3, 2004

CHEYENNE, Wyo., June 2, 2004 � Great Lakes Aviation, Ltd. (OTC Bulletin Board: GLUX.OB � news) today announced that beginning June 3, 2004, it will increase scheduled flights between Denver International Airport and Dickinson, North Dakota to three daily round trips.

�Great Lakes is proud to announce this service increase for our customers in Dickinson,� Dave Thomas, VP of Marketing and Planning of Great Lakes, commented.  �The growth in traffic we�ve seen between Dickinson and Denver has been steady, and the comments we�ve received regarding the need for more frequency in the market leads us to believe this improvement in the schedule will result in more people enjoying the convenient service and economical fares we offer.�

All flights in the market are timed to make convenient connections with flights scheduled by Frontier Airlines and United Airlines from Denver.

Dickinson � Denver Flight Schedule (Effective June 3, 2004)

Dickinson to Denver:

Flight 5118  Departs   5:52am Arrives  7:50am Operates Monday-Friday

Flight 5118 Departs  7:12am Arrives   9:10am Operates Saturday Only

Flight 5120 Departs  1:15pm Arrives   3:13pm Operates Sunday-Friday

Flight 5123 Departs  4:55pm Arrives   6:53pm Operates Sunday-Friday

Denver � Dickinson Flight Schedule (Effective June 3, 2004)

Denver to Dickinson:

Flight 5119  Departs   9:00am Arrives 11:01am Operates Monday-Friday

Flight 5122 Departs 12:45pm Arrives  2:46pm Operates Sunday-Friday

Flight 5121 Departs  2:55pm Arrives  4:56pm Operates Saturday Only

Flight 5121 Departs  8:10pm Arrives 10:11pm Operates Sunday-Friday

* = Increased Flight Operations

Great Lakes is providing scheduled passenger service at 37 airports in 10 states with a fleet of Embraer EMB-120 Brasilia and Raytheon/Beech 1900D Regional Airliners.  A total of 174 weekday flights are scheduled at three hubs, with 164 flights at Denver, 4 flights at Minneapolis/St. Paul, and 6 flights at Phoenix. All scheduled flights are operated under the Great Lakes Airlines marketing identity in conjunction with code-share agreements with Frontier Airlines and United Airlines at their Denver hub.

Additional information is available on the company web site that may be accessed at www.greatlakesav.com

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