BEFORE THE

DEPARTMENT OF TRANSPORTATION

WASHINGTON, D.C.

Ninety-Day Notice of

Great Lakes Aviation, Ltd.

Of intent to terminate service at				Docket OST-1998-3506

Sheridan, Wyoming

Pursuant to Title 49 of the

U.S. Code, Section 41719, Air 

Service Termination Notice

NOTICE OF GREAT LAKES AVIATION, LTD.

TO TERMINATE SCHEDULED AIR SERVICE

AT SHERIDAN, WYOMING

Pursuant to Title 49 of the U.S. Code, Section 41719, air service
termination notice, Great Lakes Aviation, Ltd. hereby serves its notice
of intent to terminate the scheduled air service it is providing at
Sheridan, Wyoming.

In accordance with Section 41719, Great Lakes Aviation, Ltd. supplies
the following information:

Identification of Carrier

Great Lakes Aviation, Ltd.

1022 Airport Parkway

Cheyenne, WY 82001

	Communications with respect to this document should be directed to:

	Chuck Howell					David Thomas

	CEO						VP Marketing and Planning

	Great Lakes Aviation, Ltd.			Great Lakes Aviation, Ltd.

	1022 Airport Parkway				1022 Airport Parkway

	Cheyenne, WY 82001				Cheyenne, WY 82001

	Telephone:	(307) 432 7020		(307) 432 7050

	Fax:		(307) 432 7001		(307) 432 7001

At the time of the filing of this notice, Great Lakes Aviation, Ltd.
operating as Great Lakes Airlines provides service at Sheridan, Wyoming.
 Great Lakes’ schedules are operated utilizing its own ZK two-letter
code and reservation system.  The company also provides high quality
connections through Denver, sold through its Frontier Airlines and
United Airlines code-share agreements.

Great Lakes service at Sheridan currently consists of three daily
non-stop round-trips, with additional weekend non-stop during seasonal
peaks, to Denver International Airport, a major connecting hub for
Frontier Airlines and United Airlines, in 19-seat Raytheon/Beech 1900D
Airliner and 30-seat Embraer EMB-120 Brasilia equipment.

Great Lakes Airlines provides the only scheduled passenger air service
at Sheridan, Wyoming.

The Great Lakes Airlines service being offered is as follows:

Flight Number		From	Departure	To	Arrival	Equip	Frequency

5152			SHR	0600		DEN	0725	EM2	Daily

	5156			SHR	1120		DEN	1253	BE1	Daily 

	5150			SHR	1550		DEN	1715	EM2	Daily

	5154			SHR	1726		DEN	1859	BE1	7  

	5156			DEN	0925		SHR	1048 	BE1	Daily

	5153			DEN	1355		SHR	1520	EM2	Daily

	5154			DEN	1540		SHR	1716	BE1	7

	5151			DEN	1805		SHR	1930	EM2	6

	5154			DEN	1855		SHR	2020	EM2	X67

	5151			DEN	2015		SHR	2140	EM2	7

		SHR – Sheridan, Wyoming

		DEN – Denver, Colorado

		All flights operate non-stop.

		All times listed are local time in effect as of the date of this
notice.

The Company’s scheduled service has been consistently generating
operating losses.  Fuel costs have continued to increase, with recent
year over year pricing increases of over forty percent, while passenger
traffic and revenue have yet to recover from the nearly 40% drop from
year 2000 numbers.  

Current airline ticket pricing trends continue to exacerbate losses
being generated.  Average ticket prices have remained flat over the past
four years, as the industry has been unable to pass increasing jet fuel
and other operating costs onto the consumer.

The Company has been responding to the community’s request for
additional lift during the peak summer months.  Over the past few years,
Great Lakes has provided additional frequencies, and this year utilized
the larger 30-seat equipment, during the market’s seasonal peak,
especially over the weekend periods.  Unfortunately the additional fuel
costs this year have diminished the value of the summer peak, and the
Company is facing additional losses as the traffic resumes its normal
off-peak seasonal patterns.  

The effective date of this notice is August 2, 2004.

The effective date of this intended termination is October 31, 2004 (the
last day of scheduled service would be October 31, 2004).

Objections, if any, to this Notice are due on August 22, 2004.

Respectfully Submitted,

Charles R. Howell, IV

CEO

Great Lakes Aviation, Ltd.

Cheyenne, Wyoming

August 2, 2004 

Certificate of Service

I hereby certify that I have served on August 2, 2004 by first class
mail a copy of the foregoing 90-day Notice of termination of scheduled
service at Sheridan, Wyoming to each of the persons named on the
attached service list.

Mary Kelly

Marketing Coordinator

Great Lakes Aviation, Ltd.

Service List

The Honorable James Wilson 

Mayor, City of Sheridan

55 East Grinnell Plaza

PO Box 848

Sheridan, WY 82801

Mr. John Stopka

Airport Manager

Sheridan County Airport

908 W. Brundage Lane

Sheridan, WY 82801

Mr. Dennis DeVany

Chief, EAS and Domestic Analysis

U.S. Department of Transportation

400 7th Street, SW

Washington, DC 20007

Docket Management Facility

US Department of Transportation

400 7th Street, SW

Nassif Building Room PL-401

Washington, DC 20590-0001

Ms. Shelly Reams

Director of Aviation

Wyoming Department of Transportation

200 East 8th Avenue

Cheyenne, WY 82001

