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 Grand Island, Nebraska and Denver, Colorado Beginning June 17, 2004

CHEYENNE, Wyo., June 21, 2004 � Great Lakes Aviation, Ltd. (OTC Bulletin Board: GLUX.OB� news) today announced that beginning June 17, 2004, it will offer a Special Fare for flights between Denver International Airport and Grand Island, Nebraska.  Sale begins June 17 and ends Sept 7, 2004.   Travel must commence between July 10 - Sept 7, 2004 with no advance purchase required.  Tickets are non-refundable and a $100 fee will be charged for changes.

�To celebrate the beginning of all non-stop service to Denver, we are offering this special fare,� said Dave Thomas, VP of Marketing and Planning of Great Lakes. "Now travel between Grand Island and Denver is more convenient and more affordable."

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

Grand Island � Denver Flight Schedule (Effective July 10, 2004)

Grand Island to Denver:

Flight 5158* Departs    7:15am Arrives    7:47am Operates Monday-Saturday

Flight 5158* Departs   9:35am Arrives 10:07am Operates Sunday Only

Flight 5036* Departs   1:20pm Arrives   1:52pm Operates Monday-Saturday

Flight 5042* Departs   5:05pm Arrives    5:35pm Operates Sunday-Friday

Denver � Grand Island Flight Schedule (Effective July 10, 2004)

Denver to Grand Island:

Flight 5035* Departs  10:35am Arrives 12:59pm Operates Monday-Saturday

Flight 5041* Departs   2:27pm Arrives   4:50pm Operates Sunday-Friday

Flight 5159* Departs   4:10pm Arrives    6:34pm Operates Saturday Only

Flight 5159* Departs   7:30pm Arrives   9:54pm Operates Sunday-Friday

* = Will operate Non-Stop

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 United Airlines and Frontier Airlines at their Denver hub.

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