FOR IMMEDIATE RELEASE Contact: Dave Thomas, VP Marketing and Planning

       (307) 432-7000

Great Lakes Airlines To Add Flights At Page, Arizona Beginning May 1, 2004

CHEYENNE, Wyo., April 15, 2004 � Great Lakes Aviation, Ltd. (OTC Bulletin Board: GLUX.OB � news) today announced that beginning May 1, 2004, it will increase the number of scheduled flights at Page, Arizona with a total of three weekday trips to Phoenix, Arizona and one weekday trip to Denver, Colorado.

�Great Lakes is proud to announce this service increase for our customers in Page,� Charles R. Howell IV, CEO of Great Lakes, commented. �The seasonal traffic we�ve seen at Page warrants the increase in service at this time.  The increased schedule will result in more people enjoying the convenient service and economical fares we offer.�

All flights in the market are timed to make convenient connections with flights scheduled by United Airlines and Frontier Airlines from Phoenix and Denver.

Page � Phoenix Flight Schedule (Effective May 1, 2004)

Page to Phoenix:

Flight 5176  Departs 6:30am Arrives 7:45am Operates Monday-Friday

Flight 5177 Departs 1:10pm Arrives 2:25pm Operates Daily

Flight 5124* Departs 4:50pm Arrives 6:05pm Operates Daily

Phoenix � Page Flight Schedule (Effective May 1, 2004)

Phoenix to Page:

Flight 5178  Departs 9:25am Arrives 10:37am Operates Monday-Friday

Flight 5125* Departs 3:20pm Arrives  4:32pm Operates Daily

Flight 5179 Departs 6:40pm Arrives 7:52pm Operates Daily

Page � Denver Flight Schedule (Effective May 1, 2004)

Page to Denver:

Flight 5178* Departs 10:50am Arrives 2:20pm Operates Sunday-Friday

Denver � Page Flight Schedule (Effective May 1, 2004)

Denver to Page:

Flight 5177* Departs 11:25am Arrives 1:00pm Operates Sunday-Friday

* = New Flight

Great Lakes is providing scheduled passenger service at 37 airports in ten states with a fleet of Embraer EMB-120 Brasilia and Raytheon/Beech 1900D Regional Airliners.  A total of 170 weekday flights are scheduled at three hubs, with 160 flights at Denver, 4 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 at their Denver hub.

Additional information is available on the company web site that may be accessed at www.greatlakesav.com

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