CHEYENNE, Wyo., Aug. 6 /PRNewswire-FirstCall/ -- Great Lakes Aviation, Ltd. (OTC:GLUX) (BULLETIN BOARD: GLUX) today announced preliminary passenger traffic results for the month of July 2007. Scheduled service generated 14,900,000 revenue passenger miles (RPM's), a 22.6 percent increase from the same month last year. Available seat miles (ASM's) increased 15.4 percent to 28,863,000. As a result, load factor increased 3.0 points to 51.62 percent. Passengers carried increased 16.4 percent to 54,654 when compared to July 2006. Preliminary revenue per available seat mile (RASM) decreased 1.8 percent from 31.55 cents to 30.97 cents. For the seven months ending July 31, 2007 compared to the same seven month period in 2006, revenue passenger miles (RPM's) increased 17.7 percent to 88,509,000 and available seat miles (ASM's) increased 7.6 percent to 179,689,000, resulting in a load factor of 49.26 percent for the year 2007 effecting an increase in load factor of 4.2 points compared to the same seven month period in 2006. The company carried 325,622 revenue passengers for the seven month period ending July 31, 2007, a 13.3 percent increase from the prior year. Preliminary revenue per available seat mile (RASM) increased 0.5 percent from 29.35 cents to 29.49 cents on a year-over-year basis. JULY 2007 AND YEAR TO DATE STATISTICS July-07 July-06 Change Passengers Enplaned 54,654 46,943 16.4% Revenue Passenger Miles (000) 14,900 12,156 22.6% Available Seat Miles (000) 28,863 25,007 15.4% Load Factor 51.62% 48.61% 3.0 pts RASM (cents) 30.97 31.55 (1.8%) YTD 2007 YTD 2006 Change Passengers Enplaned 325,622 287,510 13.3% Revenue Passenger Miles (000) 88,509 75,230 17.7% Available Seat Miles (000) 179,689 166,962 7.6% Load Factor 49.26% 45.06% 4.2pts RASM (cents) 29.49 29.35 0.5% 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 220 weekday flights are mostly scheduled at three hubs, with 156 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.flygreatlakes.com/

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