Frontier Airlines (1950–1986)
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| Founded | June 1, 1950 (amalgamation) | ||||||
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| Ceased operations | August 24, 1986 | ||||||
| Hubs | ATW Denver–Stapleton | ||||||
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| Headquarters | Denver, Colorado, U.S. | ||||||
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Frontier Airlines was a United States local service carrier, a scheduled airline that was formed by the merger of Arizona Airways, Challenger Airlines, and Monarch Air Lines on June 1, 1950. Headquartered at the now-closed Stapleton International Airport in Denver, Colorado, the airline ceased operations on August 24, 1986. A new airline using the same name was founded eight years later in 1994.