Cheap flights from Boston to San Francisco
Flights from Boston to San Francisco currently start at €131. Below are the cheapest dates, typical duration and airlines on this route. Search live fares when you are ready to book — prices change during the day.
Prices refresh daily · per adult · Typical time: 7h 36m
Key facts
- Lowest fare
- €131 · Mon 9 Nov
- Direct flights
- Yes
- Flight time
- 7h 36m
- Airlines
- Frontier Airlines, jetBlue, Alaska Airlines, United Airlines
- Cheapest month
- November 2026
- Distance
- 4341 km
Round trip
One way
Questions people ask before they book
How much are flights from Boston to San Francisco?
The lowest fare we currently show from Boston to San Francisco is €131 for one adult. That price is tied to specific dates and can sell out.
Are there direct flights from Boston to San Francisco?
Yes. Direct flights from Boston to San Francisco show up in current fares. Filter by Direct when you search to hide connections.
Which airlines fly from Boston to San Francisco?
Airlines showing fares on this route include Frontier Airlines, jetBlue, Alaska Airlines, United Airlines. The cheapest airline is not always the one with a bag included.
How long is the flight from Boston to San Francisco?
A typical itinerary from Boston to San Francisco takes about 7h 36m, including connections when the cheapest fare is not direct.
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November 2026