taxi from airport

beattiesman

anyone know how much roughly a taxi from san francisco airport to union square san francisco will cost

hollydays

put a question on tripadviser

underlay_guru

Hi,

According to wikitravel:

Public Airport Transportation
San Francisco and Oakland Airports are connected to downtown SF by the Bay Area Rapid Transit (BART) [7] system (Oakland Airport indirectly through a non-free shuttle bus), which costs about $5 one-way and runs frequently, every 15 or 20 minutes depending on the time of day.
Passengers arriving in SFO can walk (5 minutes from United's terminal) or take a free airport shuttle (AirTrain) to the BART station (which is next to international terminal G). From Oakland Airport, BART operates a regular shuttle to the nearest station. The cost of this "AirBart" shutle is $3 for adults ($1 for seniors/children), and it takes 10-15 minutes (you must have your fare in $1 bills, as they do not make change). Trains from there run directly to San Francisco and cost about $3.00-$4.00. BART trains head directly to downtown San Francisco and the Mission District, from where the MUNI [8] can take travelers anywhere in the city.
The San Jose airport is served by a free shuttle to both VTA Light Rail and Caltrain [9] called the Airport Flyer - VTA Route #10 [10]. Passengers arriving in San Jose can use Caltrain to reach San Francisco directly (this costs $7.50 one-way). Caltrain also links with the BART system at the Millbrae intermodal station. Be aware that public transportation within the South Bay is not as developed as around San Francisco. Also, when riding Caltrain, be sure to buy your ticket at the automated station kiosks before boarding, as they are not sold on the trains.

Private Airport Transportation
Taxis are considerably more expensive than the public transportation options. A taxi from SFO to the city can easily cost more than $40, and over $60 from OAK. Taxi and van prices from San Jose to San Francisco are significantly higher. Shared vans will cost around $14. If you plan to drive from a car rental area near the SFO airport to downtown San Francisco, you can take the 101 freeway. When returning a rental car to SFO, remember to take the rental car exit, otherwise you will have to wind your way slowly back to the rental car center.

http://wikitravel.org/en/San_Francisco