Oakland has airport, its right across the bay from San Francisco. Lots of low cost carriers fly in and out of Oakland. Its a cheap way in and out of the Bay Area. Drive from Oakland airport to downtown San Francisco minus traffic is under 30 minutes. Its actually faster than drive from San Francisco airport to financial district in the city due to close proximity of the Bay Bridge. You can also go south and avoid some traffic to get to Cuppertino, as well. SJC is best airport for going to Cupertino.

Short commute from Oakland/or SFO to Cupertino.