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
International Peace Garden Airport International Peace Garden Airport International Peace Garden Airport is a public use airport in Rolette County, North Dakota, United States on the Canada–US border. The airport is owned by the North Dakota Aeronautics Commission and located 11 nautical miles (20 km) north of the central business district of Dunseith, North Dakota. It is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a "general aviation" facility. The airport is located just east of the International Peace Garden on the North Dakota/Manitoba border. It is an airport of entry to Canada and the United States