Great Lakes Aviation, Ltd. Reports April 2005 Traffic CHEYENNE, Wyo., May 9 /PRNewswire-FirstCall/ -- Great Lakes Aviation, Ltd. (OTC:GLUX) (BULLETIN BOARD: GLUX) today announced preliminary passenger traffic results for the month of April. Scheduled service generated 8,327,000 revenue passenger miles (RPM's), a 15.1 percent decrease from the same month last year. Available seat miles (ASM's) decreased 15.5 percent to 21,673,000. As a result, load factor increased 0.2 points to 38.4 percent. Passengers carried decreased 11.5 percent to 31,110 when compared to April 2004. Preliminary revenue per available seat mile (RASM) increased 12.2 % from 20.97 cents to 23.52 cents. For the three months ending April 30, 2005 compared to the same three month period in 2004, revenue passenger miles (RPM's) decreased 10.5 percent to 36,478,000 and available seat miles (ASM's) decreased 21.5 percent to 87,802,000, resulting in a load factor of 41.5 percent for the year 2005 compared to 38.1 percent for the same three month period in 2004. The company carried 135,733 revenue passengers for the three month period ending April 30, 2005, a 10.5 percent decrease from the prior year. Preliminary revenue per available seat mile (RASM) increased 17.1% from 20.43 cents to 23.93 cents on a year-over-year basis. April traffic was adversely affected by the April 10th snowstorm in Denver which cancelled many flights. New services began on April 3rd to Silver City, Clovis and Albuquerque, New Mexico. Additionally, Great Lakes Airlines began service from Phoenix to Show Low, Arizona on May 1st and the company will initiate service between Phoenix and both Kingman and Prescott, Arizona on June 5th. APRIL 2005 AND YEAR TO DATE STATISTICS April 2005 April 2004 Change Passengers Enplaned 31,110 35,158 (11.5%) Revenue Passenger Miles (000) 8,327 9,807 (15.1%) Available Seat Miles (000) 21,673 25,660 (15.5%) Load Factor 38.4% 38.2% .2 points RASM (cents) 23.52 20.97 12.2% YTD 2005 YTD 2004 Change Passengers Enplaned 135,733 151,726 (10.5%) Revenue Passenger Miles (000) 36,476 42,548 (14.2%) Available Seat Miles (000) 87,802 111,805 (21.5%) Load Factor 41.5% 38.1% 3.4 points RASM (cents) 23.93 20.43 17.1% Great Lakes is providing scheduled passenger service at 37 airports in ten states with a fleet of Embraer EMB-120 Brasilias and Raytheon/Beech 1900D regional airliners. A total of 184 weekday flights are scheduled at three hubs, with 156 flights at Denver, 10 flights at Albuquerque, and 10 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 hub. 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/

Copyright