High Quality Content by WIKIPEDIA articles! San Francisco International Airport (IATA: SFO, ICAO: KSFO, FAA LID: SFO) is a major international airport located 13 miles (21 km) south of downtown San Francisco, California, United States, near the cities of Millbrae and San Bruno in unincorporated San Mateo County. It is often referred to as SFO. The airport has flights to points throughout North America and is a major gateway to Europe and Asia.