San Antonio International Airport

San Antonio International is the third-largest commercial airport in Texas and the primary gateway for South Texas, handling 10.4M passengers (2023). Its scale is anchored by one of the most diversified regional economies on the U.S.–Mexico border: Joint Base San Antonio (one of the largest military concentrations in the country), the Texas Medical Center south campus, Toyota's only North American pickup-truck plant, and a fast-growing financial-services corridor in the I-10 west bank. The airport also benefits from San Antonio's 37M annual tourism arrivals — driven by the Alamo, the River Walk, and Sea World — producing an inbound-visitor share among the highest of any U.S. mid-sized airport. Southwest Airlines holds the largest share of seat capacity, with American, Delta, United, Spirit, Frontier, JetBlue, Allegiant, and Alaska all operating significant year-round service. International connectivity focuses on Mexico (Aeromexico, Viva Aerobus, Volaris serve Mexico City, Guadalajara, Monterrey, Cancún) plus seasonal Condor service to Frankfurt — the airport's sole scheduled transatlantic operation. Across 35 airlines the airport serves 194 destinations on 281 scheduled routes, with an unusually high destination-per-airline ratio reflecting the diversified carrier mix. Three runways handle movements: 04/22 at 8,505 ft (2,593 m), 13R/31L at 8,502 ft (2,592 m), and 13L/31R at 5,519 ft (1,682 m). Terminals A and B operate as a single post-security airside connected by an internal walkway; Terminal A (2010, WDG Architecture) handles most domestic and all international flights with 17 gates, while Terminal B serves Southwest, American regional, and Delta from its 1984 footprint. A $2.5B expansion approved 2023 will add Terminal C with 17 additional gates, a consolidated central hall, and an expanded rental-car facility by 2028. Elevation is 809 ft (247 m) on a 2,600-acre (1,052 ha) site 8 miles north of downtown.