San Francisco International Airport (SFO) is a major international airport located 13 miles south of downtown San Francisco, California. It serves as a key gateway to the San Francisco Bay Area, which includes cities like Oakland and San Jose. Originally known as Mills Field Municipal Airport, SFO began operations in 1927 and has since expanded significantly to meet the needs of commercial aviation. The airport features four terminals equipped with modern amenities, including restaurants, shops, and lounges. SFO is a hub for United Airlines and a focus city for Alaska Airlines, offering numerous domestic and international flights. Ground transportation options include BART, Caltrain, buses, taxis, and ride-hailing services. Additionally, SFO provides extensive parking facilities and is designed to be accessible for passengers with disabilities. SFO caters to a diverse range of travelers, including business professionals, tourists, and international visitors, making it an essential transportation hub in the region.