Oakland International Airport (IATA: OAK) is five miles south of downtown Oakland, in Alameda County, California. It is owned by the Port of Oakland. It is one of three international airports in the San Francisco Bay Area. The airport has passenger service to cities in the United States, Mexico and Europe. Cargo flights fly to cities in the United States, Canada and Japan. OAK is the closest airport to the San Francisco financial district—both geographically and by public transit.
Oakland is a focus city for Southwest Airlines and Allegiant Air. As of August 2015 Southwest has 120 daily departures on peak-travel days of the week. Alaska Airlines combined with sister-carrier Horizon Air has been the second-busiest carrier at OAK through 2013. Beginning January 2014, Delta will overtake Alaska as OAK's No. 2 carrier.
The top five airlines by passenger count between October 2014 – September 2015 were Southwest Airlines (71.08), Alaska Airlines (6.28%), Spirit Airlines (4.48%), Hawaiian Airlines (3.72%), JetBlue Airways (3.49%). Between October 2014 and September 2015, 10,947,066 people traveled through OAK.