Great Lakes Aviation, Ltd. Reports April 2008 Traffic

Scheduled service generated 12,126,000 revenue passenger miles (RPM's), a 3.2 percent increase from the same month last year. Available seat miles (ASM's) increased 13.9 percent to 27,829,000. As a result, load factor decreased 4.5 points to 43.57 percent. Passengers carried increased 5.5 percent to 45,512 when compared to April 2007. Preliminary revenue per available seat mile (RASM) increased 7.6 percent from 28.34 cents to 30.48 cents.

For the four months ending April 30, 2008 compared to the same four month period in 2007, revenue passenger miles (RPM's) increased 10.8 percent to 50,203,000 and available seat miles (ASM's) increased 13.4 percent to 110,770,000, resulting in a load factor of 45.32 percent for the year 2008 effecting a decrease in load factor of 1.1 points compared to the same four month period in 2007. The company carried 186,650 revenue passengers for the four month period ending April 30, 2008, an 11.0 percent increase from the prior year. Preliminary revenue per available seat mile (RASM) increased 8.2 percent from 28.20 cents to 30.51 cents on a year-over-year basis.

                    APRIL 2008 AND YEAR TO DATE STATISTICS

                                       Apr-08      Apr-07      Change
    Passengers Enplaned                45,512      43,149      5.5%
    Revenue Passenger Miles (000)      12,126      11,745      3.2%
    Available Seat Miles (000)         27,829      24,423      13.9%
    Load Factor                        43.57%      48.09%      (4.5) pts
    RASM (cents)                       30.48       28.34       7.6%

                                       YTD 2008    YTD 2007    Change
    Passengers Enplaned                186,650     168,129     11.0%
    Revenue Passenger Miles (000)      50,203      45,326      10.8%
    Available Seat Miles (000)         110,770     97,675      13.4%
    Load Factor                        45.32%      46.41%      (1.1) pts
    RASM (cents)                       30.51       28.20       8.2%

Great Lakes is providing scheduled passenger service at 44 airports in twelve states with a fleet of Embraer EMB-120 Brasilias and Raytheon/Beech 1900D regional airliners. A total of 230 weekday flights are mostly scheduled at five hubs, with 134 flights atDenver, 8 flights at Albuquerque, 8 flights atPhoenix, 28 flights atSt. Louis and 18 flights atKansas City, MO. 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 theDenver International Airport and Phoenix Sky Harbor International Airport hubs.

Additional information is available on the company web site that may be accessed at http://www.flygreatlakes.com

Contact: Michael Matthews, VP Finance/CFO

               (307) 432-7000

SOURCE Great Lakes Aviation, Ltd.