CHEYENNE, Wyo., Jan. 12 /PRNewswire-FirstCall/ -- Great Lakes Aviation, Ltd. (OTC:GLUX) (BULLETIN BOARD: GLUX) today announced preliminary passenger traffic results for the month of December 2006. Scheduled service generated 9,919,000 revenue passenger miles (RPM's), a 6.0 percent decrease from the same month last year. Available seat miles (ASM's) decreased 11.6 percent to 21,151,000. As a result, load factor increased 3.4 points to 46.9 percent. Passengers carried decreased 6.0 percent to 37,141 when compared to December 2005. Preliminary revenue per available seat mile (RASM) increased 3.7 percent from 28.16 cents to 29.19 cents. Traffic and capacity were impacted due the widely reported snow storms that forced a significant number of flight cancellations at our Denver hub during peak holiday travel. For the twelve months ending December 31, 2006 compared to the same twelve month period in 2005, revenue passenger miles (RPM's) increased 12.3 percent to 132,252,000 and available seat miles (ASM's) increased 1.0 percent to 283,272,000. A load factor of 46.7 percent for the year 2006 generated a load factor increase of 4.7 points compared to the same twelve month period in 2005. The company carried 504,666 revenue passengers for the twelve month period ending December 31, 2006, a 13.8 percent increase from the prior year. Preliminary revenue per available seat mile (RASM) increased 13.5 percent from 26.31 cents to 29.86 cents on a year-over-year basis. DECEMBER 2006 AND YEAR TO DATE STATISTICS Dec-06 Dec-05 Change Passengers Enplaned 37,141 39,505 (6.0)% Revenue Passenger Miles (000) 9,919 10,408 (4.7)% Available Seat Miles (000) 21,151 23,938 (11.6)% Load Factor 46.9% 43.5% 3.4 pts RASM (cents) 29.19 28.16 3.7% YTD 2006 YTD 2005 Change Passengers Enplaned 504,666 443,304 13.8% Revenue Passenger Miles (000) 132,252 117,761 12.3% Available Seat Miles (000) 283,272 280,579 1.0% Load Factor 46.7% 42.0% 4.7 pts RASM (cents) 29.86 26.31 13.5% Great Lakes is providing scheduled passenger service at 39 airports in nine states with a fleet of Embraer EMB-120 Brasilias and Raytheon/Beech 1900D regional airliners. A total of 198 weekday flights are scheduled at three hubs, with 140 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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