Great Lakes Aviation, Ltd. Reports April 2003 Traffic 

CHEYENNE, Wyo., May 30, 2003 � Great Lakes Aviation, Ltd. today announced preliminary passenger traffic results for the month of April. 

Scheduled service generated 8,461,000 revenue passenger miles (RPM�s), a 24.8 percent decrease from the same month last year.  Available seat miles (ASM�s) decreased 6.6 percent to 26,501,000.  As a result, load factor decreased 6.3 points to 31.9 percent.  Passengers carried decreased 24.8 percent compared to April 2002 to 30,887. 

For the four months ending April 30, 2003 compared to the same four month period in 2002, revenue passenger miles (RPM�s) decreased 19.3 percent to 33,705,000 while available seat miles (ASM�s) decreased 8.0 percent to 105,762,000, resulting in a load factor of 31.9 percent for the year 2003 compared to 36.4 percent for the same four month period in 2002.  The company carried 124,667 revenue passengers for the four month period ending April 30, 2003, a 22.3 percent decrease on a year over year basis. 

APRIL AND YEAR TO DATE STATISTICS 

                                                            April 2003                April  2002                Change

Passengers Enplaned                                 30,887                    41,047                         - 24.8%

Revenue Passenger Miles (000)            8,461                    10,832                        - 21.9%

Available Seat Miles (000)                      26,501                   28,386                        -  6.6%

Load Factor                                             31.9%                    38.2%                       -  6.3 points

                                                            YTD 2003                YTD 2002                Change

Passengers Enplaned                            124,667                      160,346             - 22.3%

Revenue Passenger Miles (000)              33,705                        41,768             - 19.3%

Available Seat Miles (000)                       105,762                     114,902             -  8.0%

Load Factor                                               31.9%                       36.4%              -  4.5 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.