CHEYENNE, Wyo., June 8 /PRNewswire-FirstCall/ -- Great Lakes Aviation, Ltd. (OTC:GLUX) (BULLETIN BOARD: GLUX) today announced preliminary passenger traffic results for the month of May 2009. MAY 2009 AND YEAR TO DATE STATISTICS May-09 May-08 Change Passengers Enplaned 40,724 47,092 (13.5)% Revenue Passenger Miles (000) 11,190 12,753 (12.3)% Available Seat Miles (000) 34,483 27,882 23.7% Load Factor 32.45% 45.74% (13.3) pts RASM (cents) 28.62 31.25 (8.4)% YTD 2009 YTD 2008 Change Passengers Enplaned 187,958 233,742 (19.6)% Revenue Passenger Miles (000) 51,804 62,956 (17.7)% Available Seat Miles (000) 164,882 138,652 18.9% Load Factor 31.42% 45.41% (14.0) pts RASM (cents) 28.24 30.66 (7.9)% Great Lakes is providing scheduled passenger service at 65 airports in seventeen states with a fleet of Embraer EMB-120 Brasilias and Raytheon/Beech 1900D regional airliners. Additional information is available at http://www.flygreatlakes.com/ including a current route map at http://www.flygreatlakes.com/route_map/route_map.pdf. All scheduled flights are operated under the Great Lakes Airlines marketing identity in conjunction with code-share agreements with United Airlines and/or Frontier Airlines at our Albuquerque, Billings, Denver, Phoenix, Kansas City, MO and Ontario, CA hubs. The company also operates hubs in Milwaukee and St. Louis. Contact: Michael Matthews, VP Finance/CFO (307) 432-7000 DATASOURCE: Great Lakes Aviation, Ltd. CONTACT: Michael Matthews, VP Finance/CFO of Great Lakes Aviation, Ltd., +1-307-432-7000 Web Site: http://www.flygreatlakes.com/

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