CHEYENNE, Wyo., May 7 /PRNewswire-FirstCall/ -- Great Lakes Aviation, Ltd. (OTC:GLUX) (BULLETIN BOARD: GLUX) today announced preliminary passenger traffic results for the month of April 2009. APRIL 2009 AND YEAR TO DATE STATISTICS Apr-09 Apr-08 Change Passengers Enplaned 36,882 45,512 (19.0)% Revenue Passenger Miles (000) 10,100 12,126 (16.7)% Available Seat Miles (000) 33,641 27,829 20.9% Load Factor 30.02% 43.57% (13.6) pts RASM (cents) 27.69 30.48 (9.2)% YTD 2009 YTD 2008 Change Passengers Enplaned 147,234 186,650 (21.1)% Revenue Passenger Miles (000) 40,614 50,203 (19.1)% Available Seat Miles (000) 130,400 110,770 17.7% Load Factor 31.15% 45.32% (14.2) pts RASM (cents) 28.14 30.51 (7.8)% 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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