What is the city code for San Antonio, Texas?

The city code for San Antonio, Texas, is SAT. Each city served by airlines, including Southwest Airlines, is assigned a unique three-letter city code that helps identify the airport quickly and efficiently. In this case, SAT specifically stands for San Antonio International Airport, which is the primary airport serving the San Antonio area.

The other choices provided do not correspond to San Antonio. For example, SNA is the city code for John Wayne Airport in Orange County, California, while SAO is not a valid code for any U.S. airport, and STX refers to the Henry E. Rohlsen Airport on St. Croix in the U.S. Virgin Islands. Therefore, SAT is the only correct answer for San Antonio.