San Francisco International Airport is an international airport which is thirteen miles south of downtown San Francisco, California, United States. This international airport has flights to points throughout North America and is a major gateway to Europe and Asia. The best thing about this airport is that it is the largest airport in the San Francisco Bay Area and the second busiest in California, after LAX. In 2017, it was the seventh busiest airport in the United States and the 24th-busiest in the world by passenger count. It is considered as the fifth-largest hub for United Airlines. San Francisco International Airport is operated in Terminal three and the international terminal. It functions as United’s primary transpacific gateway, and it serves the San Francisco Bay Area including San Francisco and Silicon Valley. It was the seventh-busiest airport in the United States and the 24th-busiest in the world by passenger count a hub for Alaska Airlines and United Airlines. This international airport in San Francisco is owned and operated by the City and County of San Francisco. However, it is technically located outside of San Francisco in unincorporated San Mateo County.