San Francisco Tourist Information and Travel Guide
The San Francisco International Airport (SFO) is located 13 miles or 21 km south of the city in San Mateo County. It is a major hub for United Airlines and one of the largest airports in the USA.
The most economic way to travel between SFO and San Francisco USA is to catch the free Airtrain to the SFO BART Station and then the BART light rail train (Bay Area Rapid Transit) into San Francisco. The cost of a ticket into the city center is approximately $8.00.