Great Lakes Aviation, Ltd. Reports May 2008 Traffic

CHEYENNE, Wyo., June 6 /PRNewswire-FirstCall/ -- Great Lakes Aviation,
Ltd. (OTC Bulletin Board: GLUX) today announced preliminary passenger traffic
results for the month of May 2008.
Scheduled service generated 12,753,000 revenue passenger miles (RPM's), a
7.4 percent decrease from the same month last year. Available seat miles
(ASM's) increased 4.9 percent to 27,882,000. As a result, load factor
decreased 6.1 points to 45.74 percent. Passengers carried decreased 6.0
percent to 47,092 when compared to May 2007. Preliminary revenue per
available seat mile (RASM) increased 4.7 percent from 29.86 cents to 31.25
cents.
For the five months ending May 31, 2008 compared to the same five month
period in 2007, revenue passenger miles (RPM's) increased 6.5 percent to
62,956,000 and available seat miles (ASM's) increased 11.6 percent to
138,652,000, resulting in a load factor of 45.41 percent for the year 2008
effecting a decrease in load factor of 2.2 points compared to the same five
month period in 2007. The company carried 233,742 revenue passengers for the
five month period ending May 31, 2008, a 7.1 percent increase from the prior
year. Preliminary revenue per available seat mile (RASM) increased 7.4
percent from 28.55 cents to 30.66 cents on a year-over-year basis.

MAY 2008 AND YEAR TO DATE STATISTICS

May-08 May-07 Change
Passengers Enplaned 47,092 50,075 (6.0)%
Revenue Passenger Miles (000) 12,753 13,767 (7.4)%
Available Seat Miles (000) 27,882 26,584 4.9%
Load Factor 45.74% 51.79% (6.1) pts
RASM (cents) 31.25 29.86 4.7%

YTD 2008 YTD 2007 Change
Passengers Enplaned 233,742 218,204 7.1%
Revenue Passenger Miles (000) 62,956 59,094 6.5%
Available Seat Miles (000) 138,652 124,259 11.6%
Load Factor 45.41% 47.56% (2.2) pts
RASM (cents) 30.66 28.55 7.4%

Great Lakes is providing scheduled passenger service at 50 airports in
fourteen states with a fleet of Embraer EMB-120 Brasilias and Raytheon/Beech
1900D regional airliners. A current route map may be viewed at
http://www.flygreatlakes.com/route_map/route_map.htm.
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 our Denver, Phoenix and Kansas City hubs.
The company also operates hubs in Albuquerque, Milwaukee and St. Louis.
Additional information about Great Lakes Airlines is available at
http://www.flygreatlakes.com.
Contact: Michael Matthews, VP Finance/CFO
(307) 432-7000

SOURCE Great Lakes Aviation, Ltd.

Michael Matthews, VP Finance-CFO of Great Lakes Aviation, Ltd.,
+1-307-432-7000