St. George Municipal Airport (IATA: SGU, ICAO: KSGU, FAA LID: SGU) was a public airport in St. George, serving southern Utah, until 13 January 2011. It was used for general aviation and by St. George-based SkyWest Airlines on behalf of Delta Air Lines and United Airlines. SkyWest has served St. George since its founding in 1972. SkyWest, which is now one of the largest regional airlines in the world, continues to be based in St. George.