Great Lakes To Add Fifth United Express Flight between Sheridan, Wyoming and Denver Beginning June 8, 2000

GREAT LAKES AVIATION TO ADD FIFTH UNITED EXPRESS FLIGHT BETWEEN SHERIDAN, WYOMING AND DENVER BEGINNING APRIL 2, 2000.

Spencer, Iowa -- March 6, 2000 -- Great Lakes Aviation, Ltd. (NASDAQ:GLUX) today announced that beginning June 8, 2000, a fifth United Express flight will be added between Sheridan, Wyoming and Denver International Airport.

The new United Express flight will depart Sheridan at 2:16pm daily. The additional return flight to Sheridan will depart Denver at 12:25pm daily and arrive Sheridan at 1:56pm. In addition, beginning in June, extra flights will be added on weekends to accommodate visitors traveling to and from guest ranches in the vicinity of Sheridan. All flights are timed to make convenient connections with more than 450 nonstop flights scheduled by United Airlines and United Express from Denver to more than 120 Destinations.

Sheridan - Denver Schedule (effective April 2 and June 8, 2000)
Sheridan to Denver:
Flight 6582 (eff. April 2)	Departs 6:45am	Arrives 8:16am	Operates Daily
Flight 6588 (eff. April 2)	Departs 10:04am	Arrives 11:35am	Operates Monday - Saturday
Flight 6512 (eff. June 8)	Departs 11:05am	Arrives 12:36pm	Operates Weekends
Flight 6586 (eff. April 2)	Departs 12:15pm	Arrives 1:46pm	Operates Daily
Flight 6584 (eff. June 8)	Departs 2:15pm	Arrives 3:47pm	Operates Daily
Flight 6518 (eff. June 8)	Departs 3:20pm	Arrives 4:51pm	Operates Saturdays
Flight 6580 (eff. April 2)	Departs 4:25pm	Arrives 5:56pm	Operates Sunday - Friday
Flight 6588 (eff. June 8)	Departs 5:35pm	Arrives 7:06pm	Operates Sundays

Denver to Sheridan (effective April 2, 2000 and June 8, 2000)
Denver to Sheridan:
Flight 6587 (eff. April 2)	Departs 8:15am	Arrives 9:46am	Operates Monday - Saturday
Flight 6511 (eff. June 8)	Departs 9:15am	Arrives 10:46am	Operates Weekends
Flight 6589 (eff. April 2)	Departs 10:25am	Arrives 11:56am	Operates Daily
Flight 6583 (eff. June 8)	Departs 12:25pm	Arrives 1:56pm	Operates Daily
Flight 6519 (eff. June 8)	Departs 1:30pm	Arrives 3:01pm	Operates Saturdays
Flight 6585 (eff. April 2)	Departs 2:35pm	Arrives 4:06pm	Operates Daily
Flight 6587 (eff. June 8)	Departs 3:40pm	Arrives 5:11pm	Operates Sundays
Flight 6581 (eff. April 2)	Departs 7:05pm	Arrives 8:36pm	Operates Sunday - Friday

Beginning April 2, 2000, Great Lakes Aviation will be providing United Express flights at 61 airports in 14 states with a fleet of eight Embraer-120 Brasilias and 40 Raytheon/Beech 1900D regional airliners.