San Francisco International Airport is located near the cities of San Bruno and Millbrae and 21 km south of downtown San Francisco. Even though it is owned and governed by the city of San Francisco, the airport location belongs to San Mateo Country.
The mailing address of SFO is P.O. Box 8097, San Francisco, CA 94128. Geographical Address: Highway 101, San Francisco, 94128. However, in the GPS navigation system, it can easily be located just by searching “San Francisco International Airport.”