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

       (307) 432-7000

Great Lakes Airlines To Add Additional Flights Between Williston, North Dakota and Denver, Colorado Beginning June 3, 2004

CHEYENNE, Wyo., June 2, 2004 � Great Lakes Aviation, Ltd. (OTC Bulletin Board: GLUX.OB � news) today announced that beginning June 3, 2004, it will increase scheduled flights between Denver International Airport and Williston, North Dakota to three round trips.

�Great Lakes is proud to announce this service increase for our customers in Williston,� Dave Thomas, VP of Marketing and Planning of Great Lakes, commented.  �The growth in traffic we�ve seen between Williston and Denver has been steady, and the comments we�ve received regarding the need for more frequency in the market leads us to believe this improvement in the 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 Frontier Airlines and United Airlines from Denver.

Williston � Denver Flight Schedule (Effective June 3, 2004)

Williston to Denver:

Flight 5118  Departs   6:00am Arrives  7:50am Operates Monday-Friday

Flight 5118 Departs  7:20am Arrives   9:10am Operates Saturday Only

Flight 5120 Departs  1:20pm Arrives   3:13pm Operates Sunday-Friday

Flight 5123* Departs   5:05pm Arrives  6:53pm Operates Sunday-Friday

Denver � Williston Flight Schedule (Effective June 3, 2004)

Denver to Williston:

Flight 5119  Departs   9:00am Arrives 12:53am Operates Monday-Friday

Flight 5122* Departs 12:45pm Arrives   4:43pm Operates Sunday-Friday

Flight 5121 Departs  2:55pm Arrives  6:44pm Operates Saturday Only

Flight 5121 Departs  8:10pm Arrives 11:59pm Operates Sunday-Friday

* = Added Flight

Great Lakes is providing scheduled passenger service at 37 airports in 10 states with a fleet of Embraer EMB-120 Brasilia and Raytheon/Beech 1900D Regional Airliners.  A total of 174 weekday flights are scheduled at three hubs, with 164 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 Frontier Airlines and United Airlines at their Denver hub.

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

[Home] [About Us] [Contact Us] [Featured City] [Press Releases] [Route Map] [Ready to Travel?]