American Airlines announced that in the next 4 months it will stop its service to Oakland Airport, California. American had been flying out of Oakland since 1947 and had three flights a day.

Though if you want to fly on American Airlines from/to the Bay Area - there are 6 flights out of San Francisco and 7 out of San Jose Airport.

ATA and Aloha Airlines, the two bankrupt airlines used to operate from Oakland.

Interesting Stuff about Oakland Airport - (from Wikipedia)

Military aircraft mistake

On September 27, 2007, Oakland airport authorities ordered North American Airlines Flight 1777, carrying 200 U.S. Marines
home from duty in Iraq, to park 400 yards (400 m) away from the airport
terminal and refused to allow the troops to enter the terminal,
although they were allowed off the aircraft to stretch their legs and
use restrooms.[5]
The airliner had stopped in Oakland to refuel and reprovision. Oakland
authorities stated that their decision was based on the fact that, “The
airport received information that the passengers were not screened by
the Transportation Security Administration (TSA) at their originating
airport and that weapons were on-board the aircraft.” The airplane’s
passengers, however, had been screened by TSA at John F. Kennedy International Airport and no further screening was necessary.