Private transportation services, such as limousines, SUVs or buses, may be reserved for airport transportation as well as for Napa Valley winery tours. Most services can schedule your appointments for both individuals and groups as well as arrange dining reservations. The benefit is these drivers not only know the "secret routes" - they also know how to keep you extremely comfortable.
Evans Transportation has coaches to/from San Francisco and Oakland Airports (note: Unless arranged in advance, service is to their Napa station and a taxi will be required to the hotel). Find out more here >> Napa Airporter provides service to/from the Sacramento, Oakland and San Francisco airports. Find out more here >>
All major airports offer car rental stations to help visitors get to the Napa Valley. In the city of Napa, you will find Enterprise, Avis, or Budget for car rental services.