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

       (307) 432-7000

Great Lakes Airlines Offers $99.00 one-way Special Fare Sale Between Dickinson, North Dakota and Denver, Colorado Beginning May 28, 2004

CHEYENNE, Wyo., June 30, 2004 � Great Lakes Aviation, Ltd. (OTC Bulletin Board: GLUX.OB� news) today announced that it is offering a Special Fare for flights between Dickinson, North Dakota and Denver International Airport.   The sale began May 28 and ends July 15, 2004.   Travel must commence between June 3 - July 15, 2004 with no advance purchase required.  Tickets are non-refundable and a $100 fee will be charged for changes.

�Great Lakes is pleased to announce this fare sale to our customers in Dickinson,� said Dave Thomas, VP of Marketing and Planning of Great Lakes. "Now with the 3^rd round trip, travel between Dickinson and Denver is more convenient and affordable."

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

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