CHEYENNE, Wyo., April 10 /PRNewswire-FirstCall/ -- Great Lakes Aviation, Ltd. (OTC:GLUX) (BULLETIN BOARD: GLUX) today announced preliminary passenger traffic results for the month of March 2006. Scheduled service generated 10,710,000 revenue passenger miles (RPM's), a 3.8 percent increase from the same month last year. Available seat miles (ASM's) increased 0.5 percent to 24,139,000. As a result, load factor increased 1.4 points to 44.37 percent. Passengers carried increased 6.6 percent to 40,961 when compared to March 2005. Preliminary revenue per available seat mile (RASM) increased 18.7 percent from 24.67 cents to 29.28 cents. For the three months ending March 31, 2006 compared to the same three month period in 2005, revenue passenger miles (RPM's) increased 6.4 percent to 29,946,000 and available seat miles (ASM's) increased 6.7 percent to 70,584,000, resulting in a load factor of 42.43 percent for the year 2006 effecting a decrease in load factor of 0.1 points compared to the same three month period in 2005. The company carried 113,957 revenue passengers for the three month period ending March 31, 2006, an 8.9 percent increase from the prior year. Preliminary revenue per available seat mile (RASM) increased 15.4 percent from 24.06 cents to 27.77 cents on a year-over-year basis. MARCH 2006 AND YEAR TO DATE STATISTICS Mar-06 Mar-05 Change Passengers Enplaned 40,961 38,430 6.6% Revenue Passenger Miles (000) 10,710 10,322 3.8% Available Seat Miles (000) 24,139 24,010 0.5% Load Factor 44.37% 42.99% 1.4 pts RASM (cents) 29.28 24.67 18.7% YTD 2006 YTD 2005 Change Passengers Enplaned 113,957 104,663 8.9% Revenue Passenger Miles (000) 29,946 28,149 6.4% Available Seat Miles (000) 70,584 66,128 6.7% Load Factor 42.43% 42.57% (0.1) pts RASM (cents) 27.77 24.06 15.4% Great Lakes is providing scheduled passenger service at 40 airports in ten 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 142 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 International Airport hubs. Additional information is available on the company web site that may be accessed at http://www.greatlakesav.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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