San Antonio International Airport was founded in 1941 when the City of San Antonio purchased 1,200 acres (490 ha) of undeveloped land that was then north of the city limits (now part of the city's Uptown District) for a project to be called "San Antonio Municipal Airport." World War II wartime needs meant the unfinished airport was pressed into federal government service. The airport opened in July 1942 as Alamo Field and was used by the United States Army Air Forces as a training base. At the end of the war the airfield was no longer needed by the military and was turned over to the City of San Antonio for civil use.
It has three runways and covers 2,305 acres (933 ha). Its elevation is 809 feet (247 m) above sea level. SAT averages 260 daily departures and arrivals at its 24 gates, which serve 12 airlines flying non-stop to 53 destinations in the US and Mexico