In 1989, Aspen offered itself up for sale. Several suitors attempted to purchase the airline. Its employees attempted to acquire the airline, but were unable to come up with the capital. Next, the Giant Group, a conglomeration of cement and recycling companies, offered to purchase the airline, but their offer fell through. In the end, Mesa Airlines acquired Aspen's Denver hub and routes except for the Denver to Aspen route, stations and ground equipment. Air Wisconsin Services Inc., the parent company for Air Wisconsin, acquired all of Aspen's common stock, its Aspen routes, and its BAe 146 and Convair 580 aircraft. In April 1995 during the late ski season, Air Wisconsin was operating shuttle service as United Express with BAe 146 jets on the former Aspen Airways route between Aspen and Denver with no less than fourteen (14) daily nonstop flights in each direction.