Oakland has its own airport (OAK), a low-cost alternative to SFO that is served by Southwest, Spirit, and several other carriers. A BART station connects the airport directly to downtown Oakland and San Francisco. From San Francisco, BART gets you to downtown Oakland in about 15 minutes. You can also take the ferry from the San Francisco Ferry Building to Jack London Square — slower but far more scenic. Amtrak's Capitol Corridor and San Joaquin trains stop at the Oakland Jack London station.