Cheap Flights from Boston to San Francisco

¹ Fares are round trip, Fares incl. all fuel surcharges, ad valorem tax, our service fees and gov't taxes. Tickets are non refundable, non transferable, non-assignable. Name changes are not permitted. Fares are subject to change without notice. Fares subject to availability. There is a higher probability of seats being available at this fare on Tuesday, Wednesday & Thursday & may require a Saturday night stay at your destination. Lowest fares may require an advance purchase of up to 21 days. Certain Blackout dates may apply. Holidays & Weekend travel may have a surcharge.Other restrictions may apply. Our terms & conditions of purchase.

* Up to $15 off offer is on our transaction service fees only, the discount varies based on the transaction service fees charged for that ticket, and the value of discount will be up to the amount of the service fees charged for that transaction or $15 per transaction which ever is less. You must use the coupon code upon check out to avail this offer. This offer may be revised or dis-continued without notice.