CHEYENNE, Wyo., Sept. 6 /PRNewswire-FirstCall/ -- Great Lakes Aviation, Ltd. (OTC:GLUX) (BULLETIN BOARD: GLUX) today announced preliminary passenger traffic results for the month of August 2007. Scheduled service generated 15,202,000 revenue passenger miles (RPM's), a 22.5 percent increase from the same month last year. Available seat miles (ASM's) increased 14.7 percent to 29,302,000. As a result, load factor increased 3.3 points to 51.88 percent. Passengers carried increased 16.4 percent to 55,710 when compared to August 2006. Preliminary revenue per available seat mile (RASM) decreased 0.2 percent from 31.39 cents to 31.33 cents. For the eight months ending August 31, 2007 compared to the same eight month period in 2006, revenue passenger miles (RPM's) increased 18.3 percent to 103,711,000 and available seat miles (ASM's) increased 8.6 percent to 208,991,000, resulting in a load factor of 49.62 percent for the year 2007 effecting an increase in load factor of 4.1 points compared to the same eight month period in 2006. The company carried 381,332 revenue passengers for the eight month period ending August 31, 2007, a 13.7 percent increase from the prior year. Preliminary revenue per available seat mile (RASM) increased 0.4 percent from 29.62 cents to 29.75 cents on a year-over-year basis. AUGUST 2007 AND YEAR TO DATE STATISTICS August-07 August-06 Change Passengers Enplaned 55,710 47,863 16.4% Revenue Passenger Miles (000) 15,202 12,413 22.5% Available Seat Miles (000) 29,302 25,550 14.7% Load Factor 51.88% 48.58% 3.3 pts RASM (cents) 31.33 31.39 (0.2%) YTD 2007 YTD 2006 Change Passengers Enplaned 381,332 335,373 13.7% Revenue Passenger Miles (000) 103,711 87,643 18.3% Available Seat Miles (000) 208,991 192,511 8.6% Load Factor 49.62% 45.53% 4.1pts RASM (cents) 29.75 29.62 0.4% Great Lakes is providing scheduled passenger service at 40 airports in nine states with a fleet of Embraer EMB-120 Brasilias and Raytheon/Beech 1900D regional airliners. A total of 216 weekday flights are mostly scheduled at three hubs, with 152 flights at Denver, 8 flights at Albuquerque, and 20 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 the Denver International Airport and Phoenix Sky Harbor International Airport hubs. Additional information is available on the company web site that may be accessed at http://www.flygreatlakes.com/ 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.greatlakesav.com/

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