CHEYENNE, Wyo., June 9  Great Lakes Aviation, Ltd.  today announced preliminary passenger traffic results for the month of May.

Scheduled service generated 10,266,000 revenue passenger miles (RPM's), a 10.0 percent decrease from the same month last year. Available seat miles (ASM's) decreased 12.7 percent to 26,698,000. As a result, load factor increased 1.2 points to 38.5 percent. Passengers carried decreased 13.5 percent compared to May 2002 to 36,744.

For the five months ending May 31, 2003 compared to the same five month period in 2002, revenue passenger miles (RPM's) decreased 20.7 percent to 42,166,000 while available seat miles (ASM's) decreased 9.1 percent to 132,263,000, resulting in a load factor of 31.9 percent for the year 2003 compared to 36.6 percent for the same five month period in 2002. The company carried 155,554 revenue passengers for the five month period ending May 31, 2003, a 23.3 percent decrease on a year over year basis.

                       MAY AND YEAR TO DATE STATISTICS
                                  May 2003     May 2002         Change
    Passengers Enplaned            36,744       42,464          -13.5%
    Revenue Passenger Miles (000)  10,266       11,411          -10.0%
    Available Seat Miles (000)     26,698       30,587          -12.7%
    Load Factor                     38.5%        37.3%            1.2 points
                                  YTD 2003     YTD 2002         Change
    Passengers Enplaned           155,554      202,810          -23.3%
    Revenue Passenger Miles (000)  42,166       53,179          -20.7%
    Available Seat Miles (000)    132,263      145,489           -9.1%
    Load Factor                     31.9%        36.6%           -4.7 points

As of May 4, 2003, Great Lakes is providing scheduled passenger service at 41 airports in eleven states with a fleet of Embraer EMB-120 Brasilias and Raytheon/Beech 1900D regional airliners. A total of 182 weekday flights are scheduled at three hubs, with 168 flights at Denver, 8 flights at Minneapolis/St. Paul, and 6 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.