Aspen Airways was an airline carrier and regional affiliate of United Express and based in Hangar 5 in Stapleton International Airport in Denver, Colorado. Aspen ceased operations on April 1, 1990, when separate portions of the airline were acquired by Mesa Airlines and Air Wisconsin Services, Inc.

United Express is the brand name for the regional branch of United Airlines, under which five individually owned regional airlines operate short- and medium-haul feeder flights.