San Antonio International Airport (IATA: SAT, ICAO: KSAT, FAA LID: SAT) is a commercial airport in San Antonio, Texas, USA. The airport has three runways and covers 2,600 acres (1,100 ha). Its elevation is 809 feet (247 m) above sea level. SAT is a Class C airport

In 2008, San Antonio International Airport handled 8,358,515 passengers, up 3.5 percent from the 2007 total, making this the airports fourth consecutive year of increasing passenger numbers. SAT averages 280 daily departures and arrivals at its 27 gates, which serve 16 airlines flying to 31 metro areas, including Mexico City. The airport's top-ranked destinations are Dallas, Houston, Las Vegas, Chicago, Baltimore, New York, Los Angeles, Phoenix, Atlanta and Washington, D.C. As of December 2006, Southwest Airlines is the airport's largest passenger air carrier, enplaning 35.24 percent of the airport's total passengers. American, Continental, and Northwest are the next three largest carriers.
From February to September 2006, the airport was a "focus city" for United Airlines (which it called a 'hublet') with flights to 12 cities in conjunction with their partner Trans States Airlines. Trans States Airlines redeployed their aircraft elsewhere, eliminating service to seven cities. Mexicana celebrated 50 years serving the airport in September 2007, only to suspend service to San Antonio in August 2010 when the airline when bankrupt and suspended operations.
The airport is undergoing a major, multi-million dollar expansion project which will add new terminals and parking facilities. The master plan for the project will increase gate capacity to 35. In addition, construction projects involving Interstate 410 and U.S. Highway 281 have improved access to the airport. (The airport sits near the northeast corner of the I-410/US 281 intersection.) Future plans also call for Stinson Municipal Airport, currently serving general aviation, to become the city's secondary commercial airport.
Airport officials produce a 30-minute news program about once every quarter. "Airport Airwaves" airs on Tuesdays at 9 p.m., Wednesdays at 11 a.m., and Fridays at 1:30 p.m. on the Government Access cable channel.
The longest flight (by flight time due to head winds) from San Antonio International Airport is to San Francisco International Airport, a distance of 1,482 miles, with an average duration of 3 hours 34 minutes. (Served by United Airlines, Canadair CRJ-700)
The longest flight (by distance) from San Antonio International Airport is to Newark Liberty International Airport, a distance of 1,567 miles, with an average duration of 3 hours 1 minute. (Served by Continental Airlines, Boeing 737)
The shortest flight from San Antonio International Airport is to Houston George Bush Intercontinental Airport, a distance of 191 miles, with an average duration of 50 minutes. (Served by Continental Airlines, Boeing 737 and Continental Express operated by ExpressJet Airlines, Embraer ERJ-145).