CHEYENNE, Wyo., July 7 /PRNewswire-FirstCall/ -- Great Lakes Aviation, Ltd. (OTC:GLUX) (BULLETIN BOARD: GLUX) announces today they will begin operating flights on September 3, 2008, between Lewistown and Sidney, Montana and Denver, Colorado. The USDOT has granted a request made by Great Lakes in coordination with the communities to allow an air service hub change from Billings to Denver for Lewistown, Miles City and Sidney. The Company will be adding Sidney to Billings service as well as Miles City to Denver service at a later date. "The Denver International Airport offers passengers connections from their hometown to over 800 daily departures to nearly 150 non-stop destinations throughout North America and Europe," commented Monica Taylor, Director of Sales & Marketing for Great Lakes. Following is the Lewistown flight schedule effective September 3, 2008: Lewistown to Denver: (Flights will operate one-stop over Worland, Wyoming) Flight 5140 Departs 6:00a Arrives 8:45a Operates Sunday-Friday Flight 5140 Departs 7:05a Arrives 9:45a Operates Saturday Flight 5174 Departs 2:40p Arrives 5:20p Operates Monday-Friday Denver to Lewistown: (Flights will operate one-stop over Worland, Wyoming) Flight 5181 Departs 11:33a Arrives 2:25p Operates Monday-Friday Flight 5145 Departs 4:00p Arrives 6:52p Operates Saturday Flight 5145 Departs 6:52p Arrives 9:44p Operates Sunday-Friday Following is the Sidney flight schedule effective September 3, 2008: Sidney to Denver: (Flights will operate one-stop over Chadron, Nebraska or Gillette, Wyoming) Flight 5012 Departs 6:00a Arrives 8:37a Operates Monday-Friday Flight 5012 Departs 6:59a Arrives 9:36a Operates Saturday-Sunday Flight 5130 Departs 12:59p Arrives 3:49p Operates Daily Denver to Sidney: (Flights will operate one-stop over Chadron, Nebraska or Gillette, Wyoming) Flight 5173 Departs 10:00a Arrives 12:44p Operates Daily Flight 5027 Departs 4:05p Arrives 6:40p Operates Saturday Flight 5027 Departs 6:57p Arrives 9:32p Operates Sunday-Friday To purchase tickets on Great Lakes Airlines, visit http://www.flygreatlakes.com/, call the Great Lakes' reservation center at 800-554-5111 or through your travel agent. Great Lakes is providing scheduled passenger service at 50 airports in fourteen states with a fleet of Embraer EMB-120 Brasilias and Raytheon/Beech 1900D regional airliners. A current route map may be viewed at http://www.flygreatlakes.com/route_map/route_map.htm. 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 our Denver, Phoenix and Kansas City hubs. The company also operates hubs in Albuquerque, Milwaukee and St. Louis. Additional information about Great Lakes Airlines is available at http://www.flygreatlakes.com/. Contact: Monica Taylor Director of Sales & Marketing (307) 432-7000 DATASOURCE: Great Lakes Aviation, Ltd. CONTACT: Monica Taylor, Director of Sales & Marketing of Great Lakes Aviation, Ltd., +1-307-432-7000 Web site: http://www.flygreatlakes.com/

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