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Great Lakes Airlines to Replace Mesa as Codeshare Partner on Denver to Wichita Route

Denver, CO (Sept. 24, 2003) - Frontier Airlines (Nasdaq: FRNT) today announced that Mesa Air, operating as Frontier JetExpress, will be replaced by Great Lakes Airlines (Nasdaq: GLUX) for service to Wichita Mid-Continent Airport (ICT), effective Nov. 1, 2003.

Frontier Airlines has worked closely with the City of Wichita, Wichita Mid-Continent Airport and Frontier's codeshare partner, Great Lakes Airlines (Nasdaq: GLUX) to secure Great Lakes as a replacement partner for its Wichita, Kan. service. Beginning Nov. 1, 2003 all Frontier service to Wichita will be operated by Great Lakes with three daily non-stop flights between Denver and Wichita. Great Lakes and Frontier initially entered into their codeshare agreement in July 2001, and currently operate 34 codeshare markets connecting Great Lakes regional destinations in Arizona, Colorado, Kansas, Nebraska, New Mexico, North Dakota, South Dakota, Texas, Utah, and Wyoming to Frontier's coast-to-coast destinations.

"Great Lakes has been a reliable partner for Frontier since we began our relationship with them in 2001," said Sean Menke, vice president of marketing and planning for Frontier. "We are confident that Great Lakes will be able to offer Wichita a superior level of service to Denver while continuing to bring value to the travelers of Wichita as they connect to Frontier's 40 destinations."

Service from Wichita to destinations beyond Denver will continue to be sold through Frontier reservations at 800-4321-FLY. Local service between Denver and Wichita can be purchased through Great Lakes directly by calling Great Lakes reservations at 1-800-554-5111 or on its Web site at www.greatlakesav.com. Frontier will contact all passengers who are affected by the change of service to/from Wichita to assist in re-accommodating on Great Lakes.

As previously announced, Frontier Airlines and Phoenix-based Mesa Air Group, operating as Frontier JetExpress, are concluding their codeshare relationship effective Dec. 31, 2003.

About Frontier Airlines
Currently in its tenth year of operations, Denver-based Frontier Airlines is the second largest jet service carrier at Denver International Airport with a fleet of 40 aircraft and employing approximately 3,500 aviation professionals. Frontier and its affiliate Frontier JetExpress currently serve 40 U.S. cities with 200 daily flights. Frontier's maintenance and engineering department has received the Federal Aviation Administration's highest award, the Diamond Certificate of Excellence, in recognition of 100 percent of its maintenance and engineering employees completing advanced aircraft maintenance training programs, for four consecutive years. In August 2003, Frontier ranked as one of the "Top 10 Domestic Airlines" as determined by readers of Travel + Leisure magazine. Frontier provides capacity information and other operating statistics on its Web site, which may be viewed at www.frontierairlines.com.

About Great Lakes
Great Lakes Airlines provides scheduled passenger service at 41 airports in eleven states with a fleet of Embraer EMB-120 Brasilias and Raytheon/Beech 1900D regional airliners. A total of 188 weekday flights are scheduled at three hubs, with 178 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. More information about Great Lakes can be found on its Web site, at www.greatlakesav.com.