There are several Bay Area companies that offer shuttle service from Mountain View to SFO (San Francisco International Airport). However, the best and cheapest way to get from SFO to Mountain View without a car is on Caltrain from the Airport Terminal G-Lower Level to El Camino and Castro Street via the Redwood City Caltrain-Lane A and Palo Alto Transit Center. The train takes 1 hour and 16 minutes and costs $10 - $15.