FOR IMMEDIATE RELEASE Contact: Monica Taylor, Director of Sales and Marketing (307) 432-7000

Great Lakes Airlines to Add 6th Flight Between Cheyenne and Denver

CHEYENNE, Wyo., March 14, 20065 – Great Lakes Aviation, Ltd. (OTC Bulletin Board: GLUX.OB – news) today announced that beginning March 15, 2006, it will operate an additional flight from Cheyenne, WY, to the Denver International Airport, bringing the total number of round trip flights to 6, each weekday.

“Great Lakes is pleased to announce an additional flight to and from Cheyenne,” Monica Taylor, Director of Sales and Marketing for Great Lakes commented. “Our goal is to capture passengers that are currently driving due to Cheyenne’s proximity to the Denver Airport and encourage them to experience the benefits of flying from their hometown.”

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

Cheyenne – Denver Flight Schedule (Effective March 15, 2006)

Cheyenne to Denver:

Flight 5018 Departs 7:00am Arrives 7:35am Operates Monday-Saturday

Flight 5022 Departs 8:40am Arrives 9:15am Operates Daily

Flight 5172 Departs 10:35am Arrives 11:10am Operates Sunday-Friday

Flight 5020 Departs 12:57pm Arrives 1:32pm Operates Daily

Flight 5026 Departs 2:00pm Arrives 2:35pm Operates Daily*

Flight 5024 Departs 4:45pm Arrives 5:20pm Operates Sunday-Friday

Denver – Cheyenne Flight Schedule (Effective March 15, 2006)

Denver to Cheyenne:

Flight 5017 Departs 9:05am Arrives 9:40am Operates Monday-Friday

Flight 5025 Departs 11:34am Arrives 12:09pm Operates Daily*

Flight 5175 Departs 12:44pm Arrives 1:19pm Operates Daily

Flight 5019 Departs 3:43pm Arrives 4:18pm Operates Daily

Flight 5021 Departs 6:50pm Arrives 7:25pm Operates Daily

Flight 5015 Departs 9:15pm Arrives 9:50pm Operates Sunday-Friday

* = Increased Flight Operations

Great Lakes is providing scheduled passenger service at 40 airports in 10 states with a fleet of Embraer EMB-120 Brasilia and Raytheon/Beech 1900D Regional Airliners. 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.flygreatlakes.com