Cheap flights from Boston to San Francisco
from 98 US$
From 159 USD — compare hundreds of airlines
The cheapest month is usually 2026-09 · 98 US$
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About this route
Compare flights from Boston to San Francisco, a about 4,334 km route (around 5h 55m nonstop). We gather live prices from hundreds of airlines and agencies so you can find the cheapest and book on the official site, with no hidden fees. Direct flights are available. Airlines such as jetBlue, United Airlines, Virgin America operate this route.
When to buy and when to fly
Prices by date
Fares found by date — cheapest days in green.
How to get the best price
Airlines on this route
FAQ
What's the cheapest month to fly Boston to San Francisco?
It's usually 2026-09, from 98 USD. Use the price calendar to compare other dates.
How long is the flight from Boston to San Francisco?
A nonstop flight takes about 5h 55m and covers around 4,334 km. Connecting itineraries take longer.
Are there direct flights from Boston to San Francisco?
Yes, this route has nonstop flights. Filter by "nonstop" to see them.
Which airlines fly from Boston to San Francisco?
jetBlue, United Airlines, Virgin America operate this route, among others. Compare them all in the results.
When should I book Boston–San Francisco flights?
As a rule of thumb, booking 3–8 weeks ahead and avoiding weekends and holidays tends to give the best prices. Use the calendar to spot the cheapest dates.
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