Stapleton International Airport Plaza (Denver's tallest at 714′). Due to Stapleton's location east of downtown, the Federal Aviation Administration imposed a building height restriction of 700'-715' (depending on where the building was). This allowed an unimpeded glide slope for runways (8L/26R) and (8R/26L). The height restriction was lifted in 1995, well after the city's skyscrapers had been erected. By the 1980s, plans were under way to replace Stapleton with a new airport. Stapleton was plagued with a number of problems, including: The Colorado General Assembly brokered a deal in 1985 to annex a plot of land in Adams County into the city of
Whetstone International Airport Whetstone International Airport Whetstone International Airport or Del Bonita/Whetstone International Airport is a public use airport at the Canada–US border, in Port of Del Bonita, Glacier County, Montana, south of Del Bonita, Cardston County, Alberta. The airport is owned by the U.S. state of Montana and is operated by the Montana Department of Transportation Aeronautics Division. It is located northwest of the city of Cut Bank, Montana. The airport has a runway located on the border, with aircraft tie down areas in Canada and in the United States. It is classified as an airport of entry by Nav Canada and