San Francisco to Boston flights
The cheapest round trip we found from San Francisco to Boston is $326 (Dec 8 – 13, 1 stop). It usually costs $326.
SFO to BOS · Round trip · Economy · Prices per person in USD · Price found (1 day ago)
Cheapest found
Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| November 2026 | $581 |
| December 2026 | $326 |
| January 2027 | No fares found yet |
| February 2027 | No fares found yet |
| March 2027 | No fares found yet |
| April 2027 | No fares found yet |
| May 2027 | No fares found yet |
| June 2027 | $261 (cheapest month) |
Cheapest dates in the next 4 months
Round trip, per person-
Dec 8 – 13 5 nights · leave Tue$326$326 Book
Alaska Airlines 1 stop · 7h 16m -
Nov 22 – 28 6 nights · leave Sun$581 +78% vs usual$581 +78% vs usual Book
Southwest Airlines 2 stops · 7h 30m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Things to do in Boston
One Go City pass for Museum of Fine Arts, Isabella Stewart Gardner Museum, Paul Revere House and more
- All-Inclusive Pass Unlimited Visit as many attractions as you like for 1–7 days from $79 See pass
- Explorer Pass Pick 2–5 of 47 attractions from $54 See pass
Go City prices checked Oct 23, 2026; the final price is on Go City. Partner links: we may earn a commission if you book, at no extra cost to you.
Plan the rest of your trip
Boston · Dec 8 – 13Partner links: we may earn a commission if you book, at no extra cost to you.
More from San Francisco
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- Ontario $68 −53%
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Flights to Boston from other cities
All flights to Boston Flying the other way? Boston to San Francisco from $318
San Francisco to Boston: questions
How much does a flight from San Francisco to Boston cost?
The cheapest round trip we have found right now is $326, leaving December 8 and returning December 13. The usual price on this route is about $326. Prices are per person, economy, in USD.
What is the cheapest month to fly from San Francisco to Boston?
June 2027, with round trips from $261. The most expensive month in our data is November (from $581). Based on the 3 months ahead we have prices for.
Which airports do San Francisco to Boston flights use?
San Francisco airports include San Francisco International (SFO). Boston airports include Logan International (BOS) and Pease Air Force Base (PSM). The prices on this page cover every airport in both cities (SFO and BOS are the city codes).
About this route
We track round-trip economy fares from San Francisco (United States) to Boston (United States) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $326, departing December 8 and returning December 13. The cheapest month to fly in our data is June, from $261. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.