Originally Posted by Silverman
San Francisco only has one airport. You could make the argument that OAK is a secondary airport serving the frater Oakland/SF region. SJC is in a different metro area so really would not be considered an airport for SF. SJC primarily serves the San Jose/Silicon Valley area as well as the Greater Santacruz and Monterey areas.
SFO-OAK-SJC are "The Bay Area"
I routinely fly into SJC and out of SFO in the same day. The drive is about 45 minutes. OAK is the prefered airport of many in the Bay Area, and increasingly many are chosing to fly from SJC rather than SFO. San Jose, Oakland and San Francisco are however considered a combined Major Metro Area.
You should also note thet SFO is not in San Francisco, it is in the City of South San Francisco....but in San Francisco County.
Using your logic SFO is not a San Francisco airport. DCA and IAD are not DC airports, while DCA technically is given a DC address it is in Arlington Virginia. EWR is not a New York airport as it is in NJ. CVG is not a Cinncinatti airport because it is in Kentuky. NRT is not a Tokyo airport because it is well outside of Tokyo.....and the only London airport would be LCY as the other airports are not in the City of London, they are in Boroughs of London.