Average price (all airlines)
Cheapflights currently has 50 SFO-BOS flights for under $500. Flights to Boston will vary based on many factors, like date and time. Click here to find the best price for your dates on Cheapflights.
United Airlines has received a 6.3/10 rating from 1,498 Cheapflights user reviews. If you wish to plan your next trip from San Francisco to Boston with United Airlines, enter your preferred travel dates above!