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

                   (307) 432-7000

Great Lakes Airlines Expands into Oklahoma

CHEYENNE, Wyo., February 8, 2005 � Great Lakes Aviation, Ltd. (OTC Bulletin Board: GLUX.OB � news) today announced new service will commence on March 13, 2005, from Denver, Colorado to Ponca City and Enid, Oklahoma.

�Great Lakes is proud to provide service into Oklahoma�, said Dave Thomas VP of Marketing and Planning for Great Lakes. "The addition of Ponca City and Enid adds Oklahoma to our route map and offer travelers from those communities convenient and reliable service to our Denver hub."

Following is the Ponca City flight schedule effective March 13, 2005:

Ponca City to Denver:

Flight 5160 Departs  6:00a Arrives    7:25a Operates Monday-Saturday

Flight 5162 Departs  2:10p Arrives   3:35p Operates Sunday-Friday

Denver to Ponca City:

Flight 5161 Departs 10:30a Arrives   1:55p Operates Monday-Friday

Flight 5163 Departs  4:20p Arrives   7:45p Operates Saturday

Flight 5179 Departs  7:10p Arrives  10:35p Operates Sunday-Friday

Following is the Enid flight schedule effective March 13, 2005:

Enid to Denver:

Flight 5130 Departs  6:05a Arrives    7:30a Operates Monday-Saturday

Flight 5132 Departs  2:05p Arrives   3:30p Operates Sunday-Friday

Denver to Enid:

Flight 5131 Departs 10:25a Arrives   1:50a Operates Monday-Friday

Flight 5133 Departs  4:15p Arrives   7:40p Operates Saturday

Flight 5133 Departs  6:55p Arrives  10:20p Operates Sunday-Friday

As of March 1, Great Lakes will be providing scheduled passenger service at 34 airports in ten states with a fleet of Embraer EMB-120 Brasilia and Raytheon/Beech 1900D Regional Airliners. A total of 162 weekday flights are scheduled at two hubs, with 156 flights at Denver 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