Great Lakes Aviation, Ltd. Reports November 2005 Traffic

CHEYENNE, Wyo., Dec. 9 /PRNewswire-FirstCall/ — Great Lakes Aviation, Ltd. (BULLETIN BOARD: GLUX) today announced preliminary passenger traffic results for the month of November.

Scheduled service generated 9,477,000 revenue passenger miles (RPMs), a 6.4 percent decrease from the same month last year. Available seat miles (ASMs) increased 0.7 percent to 22,843,000. As a result, load factor decreased 3.1 points to 41.5 percent. Passengers carried decreased 1.5 percent to 36,004 when compared to November 2004. Preliminary revenue per available seat mile (RASM) increased 20.2 % from 23.47 cents to 28.22 cents.

For the eleven months ending November 30, 2005 compared to the same eleven month period in 2004, revenue passenger miles (RPMs) decreased 13.0 percent to 107,353,000 and available seat miles (ASMs) decreased 12.9 percent to 256,642,000, resulting in a load factor of 41.8 percent for the year 2005 compared to 41.9 percent for the same eleven month period in 2004. The company carried 403,799 revenue passengers for the eleven month period ending November 30, 2005, a 9.4 percent decrease from the prior year. Preliminary revenue per available seat mile (RASM) increased 16.4% from 22.45 cents to 26.14 cents on a year-over-year basis.

The company will initiate service between Pueblo and Denver, Colorado on December 18, 2005.

                 NOVEMBER 2005 AND YEAR TO DATE STATISTICS                                 November 2005   November 2004   Change   Passengers Enplaned              36,004          36,557      (1.5%)   Revenue Passenger Miles (000)     9,477          10,120      (6.4%)   Available Seat Miles (000)       22,843          22,690       0.7%   Load Factor                        41.5%           44.6%     (3.1) points   RASM (cents)                      28.22           23.47      20.2%                                    YTD 2005        YTD 2004     Change   Passengers Enplaned             403,799         445,959      (9.4%)   Revenue Passenger Miles (000)   107,353         123,390     (13.0%)   Available Seat Miles (000)      256,642         294,727     (12.9%)   Load Factor                        41.8%           41.9%     (0.1) points   RASM (cents)                      26.14           22.45      16.4%     

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. A total of 188 weekday flights are scheduled at three hubs, with 130 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

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/