Stapleton International Airport Stapleton International Airport Stapleton International Airport was the primary airport serving Denver, Colorado, United States from 1929 to 1995. At different times it served as a hub for Continental Airlines, the original Frontier Airlines, People Express, Trans World Airlines (TWA), United Airlines and Western Airlines. Other airlines with smaller hub operations at Stapleton included Aspen Airways, the current version of Frontier Airlines and Rocky Mountain Airways, with all three of these air carriers being based in Denver at the time. In 1995, Stapleton was replaced by Denver International Airport. It has since been decommissioned and the property redeveloped as a
Stapleton International Airport Denver to El Paso, St. Louis and Tulsa. Frontier operated northbound and southbound from Denver to the other mountain states. Western connected Denver to Minneapolis and Edmonton. The April 1957 OAG shows 38 United, 12 Continental, seven Braniff, seven Frontier, seven Western, five TWA and one Central. The jet age arrived in May 1959 when Continental began operating Boeing 707 jetliners into Stapleton, initially under weight restrictions due to Stapleton's runway capacity. Runway 17/35 and a new terminal building opened in 1964. Although Stapleton officially adopted the "International" name in 1964, its first nonstop international service came in 1968, when