Great Lakes Aviation, Ltd. Reports February 2004 Traffic CHEYENNE, Wyo., March 16 /PRNewswire-FirstCall/ -- Great Lakes Aviation, Ltd. (BULLETIN BOARD: GLUX) today announced preliminary passenger traffic results for the month of February. Scheduled service generated 10,283,000 revenue passenger miles (RPM's), a 26.9 percent increase from the same month last year. Available seat miles (ASM's) increased 10.1 percent to 27,509,000. As a result, load factor increased 5.0 points to 37.4 percent. Passengers carried increased 22.9 percent to 36,976 when compared with February 2003. For the two months ending February 29, 2004 compared to the same two month period in 2003, revenue passenger miles (RPM's) increased 23.5 percent to 20,909,000 while available seat miles (ASM's) increased 4.7 percent to 56,458,000, resulting in a load factor of 37.0 percent for the year 2004 compared to 31.4 percent for the same two month period in 2003. The company carried 74,898 revenue passengers for the two month period ending February 29, 2004, a 19.0 percent increase on a year over year basis. FEBRUARY AND YEAR TO DATE STATISTICS February 2004 February 2003 Change Passengers Enplaned 36,976 30,089 22.9% Revenue Passenger Miles (000) 10,283 8,105 26.9% Available Seat Miles (000) 27,509 24,986 10.1% Load Factor 37.4% 32.4% 5.0 points YTD 2004YTD 2003 Change Passengers Enplaned 74,898 62,931 19.0% Revenue Passenger Miles (000) 20,909 16,932 23.5% Available Seat Miles (000) 56,458 53,940 4.7% Load Factor 37.0% 31.4% 5.6 points Great Lakes is providing scheduled passenger service at 39 airports in ten states with a fleet of Embraer EMB-120 Brasilias and Raytheon/Beech 1900D regional airliners. Atotal of 186 weekday flights are scheduled at three hubs, with 176 flights at Denver, 4 flights at Minneapolis/St. Paul, and 6 flights at Phoenix. All scheduled flights are operated under the Great Lakes Airlines marketing identity in conjunction withcode-share agreements with United Airlines and Frontier Airlines at their Denver hub. Additional information is available on the company web site that may be accessed at http://www.greatlakesav.com/ . For further information please contact Dave Thomas, VP Marketing and Planning of Great Lakes Aviation, Ltd., +1-307-432-7000. DATASOURCE: Great Lakes Aviation, Ltd. CONTACT: Dave Thomas, VP Marketing and Planning of Great Lakes Aviation, Ltd., +1-307-432-7000 Web site: http://www.greatlakesav.com/

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