Stapleton International Airport was Denver, Colorado's primary airport

Airport

An airport is a location where aircraft such as fixed-wing aircraft, helicopters, and blimps take off and land. Aircraft may be stored or maintained at an airport...

 from 1929 to 1995. At different times it served as a hub for TWA

Twa

The Twa are any of several hunting peoples of Africa who live interdependently with agricultural Bantu populations, and generally hold a socially subordinate position: They provide the farming population with game in exchange for agricultural products....

, People Express, Frontier Airlines and Western Airlines

Western Airlines

Western Airlines was a large airline based in California, with operations throughout the Western United States, and hubs at Los Angeles International Airport, Salt Lake City International Airport, and the former Stapleton International Airport in Denver...

 as well as a hub for Continental Airlines

Continental Airlines

Continental Airlines was a major American airline now merged with United Airlines. On May 3, 2010, Continental Airlines, Inc. and UAL, Inc. announced a merger via a stock swap, and on October 1, 2010, the merger closed and UAL changed its name to United Continental Holdings, Inc...

 and United Airlines

United Airlines

United Air Lines, Inc., is the world's largest airline with 86,852 employees United Air Lines, Inc., is the world's largest airline with 86,852 employees United Air Lines, Inc., is the world's largest airline with 86,852 employees (which includes the entire holding company United Continental...

 at the time of its closure.

In 1995 Stapleton was replaced by Denver International Airport

Denver International Airport

Denver International Airport , often referred to as DIA, is an airport in Denver, Colorado. By land size, at , it is the largest international airport in the United States, and the third largest international airport in the world after King Fahd International Airport and Montréal-Mirabel...

. It has now been decommissioned and the airport property is being redeveloped as a retail and residential neighborhood.
Stapleton was opened on October 17, 1929 as Denver Municipal Airport.