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

       (307) 432-7000

Great Lakes Airlines To Add Non-Stop Flights Between Grand Island, Nebraska and Denver, Colorado Beginning July 10, 2004

CHEYENNE, Wyo., June 17, 2004 � Great Lakes Aviation, Ltd. (OTC Bulletin Board: GLUX.OB � news) today announced that beginning July 10, 2004, it will upgrade its flight schedule between Denver International Airport and Grand Island, Nebraska.  In accordance with the selection of Great Lakes� non-stop option by the United States Department of Transportation, all Grand Island flights operated by the airline will be non-stop to and from Denver. 

�This non-stop service is an important step in improving our service for customers in Grand Island,� said Dave Thomas, VP of Marketing and Planning of Great Lakes. �Our ability to provide convenient connections to our two partners, Frontier and United, along with the growth of Denver as the premier low-fare hub in the Midwest, allows Grand Island customers convenient and affordable air service they haven�t seen in years.�

All flights 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 10:35pm 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