Cheap flights from Boston to San Francisco

Bing travel utilizes over a billion airfares on a daily basis to bring you Price Predictors, and now we're using that data to uncover cheap flights from Boston to San Francisco every day. Note that deals are compiled on yesterday's lowest airfares and can change often.

Featured flight deal from Boston to San Francisco

• Boston (BOS) to San Francisco (SFO)

  $231 less than average low on record

  $240

  Fares rising

  View dates
  See more: Low fares from Boston to San Francisco

Lowest fares from Boston to San Francisco

Use our flexible travel graph to find the lowest airfare from Boston to San Francisco. Currently the cheapest flight you can find in the next 30 days from Boston to San Francisco departs on 02/27/2012 and returns 02/28/2012 with a low fare of $240.

View complete flexible search for BOS to SFO (modify trip length and dates)