I like SFO.
Also, when flying to Sacramento recently I took the Norwegian Air trip from Gatwick to Oakland and then capitol corridor to Sacramento. Didn't even need to get on BART; the airport connector took me to the catwalk to Amtrak.
The only airport in the bay that seems hard to access is San Jose, which has less service anyway.
Here's a map with travel times: http://www.trulia.com/local/94128/driving:1%7Ctransit:0%7Cpo...
But anyway, I was talking about the entrance.
30 minutes would barely get you from central SF to the airport ramp with a mostly empty 101.
But that's not the problem. Getting parked and a shuttle in will be at least 45 minutes, if you get a shuttle faster than normal.
Taking BART to SFO entrance: check the schedules. You'll be surprised how much of the day it doesn't run at all.
I may have always gotten lucky and when I actually plan the trip I try to go for more like 45min travel-to-airport-time. Just to be sure.
On Thanksgiving or such, the off-ramp from 101 to SFO takes about an hour. That's crazy.
"Things are bad here, but the good news is it's worse everywhere else." \s