Big Birds at SFO!

San Francisco International Airport (IATA: SFO, ICAO: KSFO, FAA LID: SFO) is an international airport 13 miles (21 km) south of downtown San Francisco, California, United States, near Millbrae and San Bruno in unincorporated San Mateo County. It has flights to points throughout North America and is a major gateway to Europe and Asia.

SFO is the largest airport in Northern California and the second busiest in California, after Los Angeles International Airport. In 2014, it was the seventh busiest in the United States and the twenty-first busiest airport in the world by passenger count. It is the fifth largest hub for United Airlines and functions as United Airlines's primary transpacific gateway. It also serves as Virgin America's principal base of operations. It is the sole maintenance hub of United Airlines, and houses the Louis A. Turpen Aviation Museum and Library.

SFO is owned and policed by the City and County of San Francisco, but is in San Mateo County. Between 1999 and 2004 the San Francisco Airport Commission operated city-owned SFO Enterprises, Inc., to oversee its business purchases and operations of ventures