Southwest Airlines operates from San Antonio International Airport (SAT) in San Antonio, Texas. For any inquiries regarding Southwest flights or services, you can always reach their customer support at ☎️++1-855-469-1734 ☎. San Antonio International Airport is the primary airport Southwest uses for departures and arrivals in the San Antonio area. If you need more information on Southw... https://central.xero.com/s/question/0D58V00009PiitISAR/what-airport-does-southwest-fly-out-of-in-san-antonio