Great Lakes Announces Thomas J. Ahmann as CFO

GREAT LAKES AVIATION TO UPGRADE UNITED EXPRESS SERVICE AT SCOTTSBLUFF, NEBRASKA BEGINNING JUNE 1.

Spencer, Iowa -- April 23, 1998 -- Great Lakes Aviation, Ltd. (NASDAQ:GLUX) today announced that beginning June 1, 1998, all United Express flights between Scottsbulff, Nebraska and Denver International Airport will be scheduled to operate non-stop in both directions.

Great Lakes' initial schedule of four round trips includes one round trip that makes an enroute stop in Laramie, Wyoming. The fourth round trip flight added on April 23rd provides travelers with a new late afternoon departure from Denver and an early evening return to Denver.

The expanded service will succeed flights operated by Mesa Airlines. Initial schedules will closely mirror the flights currently scheduled at these cities in order to minimize any disruption of travel plans already in place. United Express flights to be operated by Great Lakes Aviation will be scheduled in 19-seat Beech 1900D regional airliners.

"We are pleased to be able to offer travelers to and from the Scottsbluff/Gerin area a continuation of United Express service", said Doug Voss, Great Lakes' president and chief executive officer. "United Express flights to Denver are timed to allow excellent connections to and from the global network of flights operated by United Airlines and United Express which, together, offer over 400 daily departures from Denver".

Scottsbluff - Denver Schedule (effective April 23, 1998)

Scottsbluff to Denver
	Flight	Depart	Arrive	Frequency
	5870	6:00a	7:29a	Ex Su - disc. 5/31
	5870	6:20a	7:15a	Ex Su - eff. 6/1
	5882	10:34a	11:29a	Daily
	5884	2:40p	3:36p	Daily
	5886	6:35p	7:30p	Ex Sa
Denver to Scottsbluff
	Flight	Depart	Arrive	Frequency
	5881	8:15a	9:05a	Ex Su
	5883	12:15p	1:05p	Daily
	5885	4:15p	5:05p	Ex Sa
	5877	5:45p	7:17P	Sa only - disc. 5/31
	5877	5:45p	6:35p	Sa only - eff. 6/1
	5879	8:40p	10:12p	Ex Sa Su - disc. 5/31
	5887	8:40p	9:30p	Su only - disc. 5/31
	5887	8:40p	9:30p	Ex Sa - eff. 6/1

With the addition of the 14 new communities beginning April 23, Great Lakes Aviation will be providing United Express service between Denver and 27 airports with 90 weekday flights. Beginning June 1, service will be expanded to 116 weekday flights when service will be added between Denver and four additional cities currently served by Mesa Airlines. In addition, Great Lakes will continue to operate United Express service at Chicago-O'Hare International Airport (106 weekday flights) and Minneapolis/St. Paul (22 weekday flights).

The company also operates 16 weekday flights between Springfield, IL and Chicago-Meigs Field under the Great Lakes Airlines marketing identity.

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