AIRPORTS
Though located 13 miles (21 km) south of downtown in unincorporated San Mateo County,San Francisco International Airport (SFO) is under the jurisdiction of the City and County of San Francisco. SFO is a hub for United Airlines and Virgin America. SFO is a major international gateway to Asia and Europe, with the largest international terminal in North America. In 2011, SFO was the 8th busiest airport in the U.S. and 22nd busiest in the world, handling over 40.9 million passengers.
Located across the bay, Oakland International Airport is a popular, low-cost alternative to SFO. Geographically, Oakland Airport is approximately the same distance from downtown San Francisco as SFO, but due to its location across San Francisco Bay, it is greater driving distance from San Francisco.