Boston to San Francisco flights
Round trip · Economy · Prices per person in USD
Prices updated
Prices are typical right now
$364 is close to the usual $402 for Boston → San Francisco.
Buy now or wait? We're still learning this route. We have 1 day of prices so far and need about a week to say whether to book or wait.
Not ready to book? Get an email when Boston → San Francisco drops below your price.Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| September 2026 | No fares found yet |
| October 2026 | $364 (cheapest month) |
| November 2026 | $393 |
| December 2026 | $435 |
| January 2027 | No fares found yet |
| February 2027 | $412 |
Cheapest dates in the next 4 months
Round trip, per person-
Oct 29 – Nov 1 3 nights · leave Thu$364 −9% vs usual$364 −9% vs usual Book
Alaska Airlines 1 stop · 8h 35m -
Oct 23 – 25 2 nights · leave Fri$393$393 Book
Alaska Airlines 1 stop · 7h 52m
-
Nov 18 – 25 7 nights · leave Wed$393$393 Book
Alaska Airlines 1 stop · 8h 34m
-
Nov 22 – 27 5 nights · leave Sun$419$419 Book
Southwest Airlines 2 stops · 8h 10m -
Dec 15 – 19 4 nights · leave Tue$435 +8% vs usual$435 +8% vs usual Book
Southwest Airlines 1 stop · 7h 30m
-
Nov 24 – 27 3 nights · leave Tue$458 +14% vs usual$458 +14% vs usual Book
jetBlue 1 stop · 6h 48m -
Nov 23 – 29 6 nights · leave Mon$529 +32% vs usual$529 +32% vs usual Book
jetBlue 2 stops · 8h 25m
-
Oct 9 – 19 10 nights · leave Fri$581 +45% vs usual$581 +45% vs usual Book
American Airlines 1 stop · 8h 06m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Things to do in San Francisco
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Airport transfer to San Francisco
Fixed prices from SFO on KiwitaxiTo see transfer prices here, turn on partner content in .
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Plan the rest of your trip
San Francisco · Oct 29 – Nov 1Travel insurance · EKTA Airport transfer · Kiwitaxi
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Good to know
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Boston to San Francisco: questions
How much is a flight from Boston to San Francisco?
The cheapest round trip we have found right now is $364, leaving October 29 and returning November 1. The usual price on this route is about $402, so this fare is 9% less. Prices are per person, economy, in USD.
What is the cheapest month to fly from Boston to San Francisco?
October 2026, with round trips from $364. The most expensive month in our data is December (from $435). Based on the 4 months ahead we have prices for.
About this route
We track round-trip economy fares from Boston (United States) to San Francisco (United States) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $364, departing October 29 and returning November 1, about 9% below the usual $402. Right now we're following 12 upcoming date combinations on this route. The cheapest month to fly in our data is October, from $364. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.