Cheap flights from Boston to San Francisco

From €120 one way, departing Tue 15 Dec. Mondays are usually cheapest. We compare airlines and travel agencies and add no fees.

Lowest fare found€120One way on Tue 15 Dec

Cheapest day of the weekMondaysAbout €157 less than Sundays

Cheapest monthDecemberFrom €120 on Tue 15 Dec

Cheapest dates from Boston to San Francisco

The lowest one-way fares we found for the coming months. Pick a date to see every flight.

Lowest fare by month

€172Nov €120Dec

Typical fare by day of the week

€202Mon

€244Tue

€203Sat

€359Sun

Price history

We have not recorded any prices for BOS to SFO yet. The chart appears after people search this route.

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Airport transfer in San Francisco

Arrange a pick-up at San Francisco airport (SFO) before you fly.

KiwitaxiPre-booked private transfers between the airport and your hotel in many countries.Welcome PickupsAirport pickups with a driver who tracks your flight.

Things to do in San Francisco

Find tours, tickets and day trips in San Francisco, United States.

KlookTours, attraction tickets and day trips.TiqetsMuseum, landmark and attraction tickets, mostly in Europe.

Car rental in San Francisco

Compare rental cars for San Francisco (pick up at SFO or in town).

LocalrentCar rental from local companies, often outside the big brands.EconomybookingsCompares car rental offers from several suppliers.

Boston to San Francisco: common questions

Answers use the fares we found most recently and are updated through the day.

How much is a flight from Boston to San Francisco?

The lowest one-way fare we found recently is €120, departing Tue 15 Dec. A typical cheapest fare on other days is around €203. Prices change often, so check the live price before you book.

Which day is cheapest to fly from Boston to San Francisco?

Mondays are usually the cheapest day, about €157 less than Sundays, based on fares found for the next five months.

Which month is cheapest to fly to San Francisco?

December 2026 has the lowest fare we found, from €120 on Tue 15 Dec.

How long is the flight from Boston to San Francisco?

Boston and San Francisco are about 4,340 km apart. A direct flight takes roughly 6 hours; flights with a stop take longer.

Does SkimFlight charge a booking fee?

No. SkimFlight compares prices from airlines and travel agencies and sends you to the seller to book. You pay the seller’s price with no fee from us.