In Switzerland the Airport has 28 trains per hour that connect it directly to almost every part of the country. In addition to that there is a tram line and many bus lanes.
But I guess in SF they can take a taxi that might be a little cheaper because the company operating it is fine with losing 100s of millions a year.
But I guess in SF they can take a taxi that might be a little cheaper because the company operating it is fine with losing 100s of millions a year.