Montrose Regional Airport (IATA: MTJ, ICAO: KMTJ, FAA LID: MTJ) is a non-towered public airport on the northwest side of Montrose, in zip code 81401 in southwestern Colorado. Its two runways are at elevation 5,759 feet (1,755 m). MTJ covers 966 acres (391 ha) of land. Monarch Airlines started flying to Montrose in the 1940s. Successor Frontier Airlines (1950-1986) flew to the present airport since the 1950s; the first jets were Frontier Boeing 737-200s in 1982 (runway 12/30 was then 8500 ft). Earlier, Frontier flew Convair 580s between Montrose and Denver.