Find cheap flights from Boston to San Francisco

BOS - SFO

Find cheap flights from Boston to San Francisco

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Economy
Boston (BOS)
San Francisco
Wed 12/8
Wed 19/8
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Good to know

Low season

September Best time to beat the crowds (14% less expensive on average)

High season

December Most popular time to fly (20% more expensive on average)

Average price of a return ticket

£323 (avg. price over the last 2 weeks)

Good deal for a return ticket

£294 or less

When to book flights from Boston to San Francisco

Estimated return price
Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for finding a cheap flight

  • Looking for a cheap flight? 25% of our users found flights on this route for £134 or less.
  • The cheapest flight from Boston to San Francisco was found, on average, 51 days before departure.
  • Book at least 3 weeks before departure in order to get a below-average price.
  • High season is considered to be November, December and January. The cheapest month to fly is September.
  • Morning departure is around 14% cheaper than an evening flight, on average*.
  • After long flights from Boston to San Francisco, you are most likely looking to rest and recuperate. That is where the Best Western Plus Grosvenor Airport Hotel can help. This hotel is located just 1.5 miles from the airport and is the perfect hotel for those traveling for both business and pleasure.
  • If you feel like you need of a bit of a pick-me-up after your long flight from Boston to San Francisco, stop by Freshen Up. This unique airport concept is located in the main hall of San Francisco International Airport near the entrance to gates G91-G102. Freshen Up offers shower facilities, toiletries, ironing facilities, and undergarments, all designed to get you feeling like yourself again after your long flight.
  • If you are craving a cold beer before your flight from Boston to San Francisco, then why not stop by the Boston Beer Works? Located in Terminal C near Gate C-14 at Boston Logan International Airport, this restaurant offers soups and salads as well as a variety of wraps and plates and, of course, a wide selection of craft beers.
  • When looking for something completely unique to commemorate your time in Boston, stop by New England Collections located in Terminal A near Gate A-7 at Boston Logan International Airport. This specialty shop carries a whole host of gifts, clothing, and novelties that highlight the unique New England lifestyle.
  • Sports fans with some time on their hands before flights from Boston to San Francisco should make it a point to stop in at Game On located in Terminal A near Gate A15 in Boston Logan International Airport. This unique concept is part restaurant, part sports bar, and part game room.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for booking Boston to San Francisco flights

Which airlines have a flexible cancellation policy for flights from Boston Logan Intl to San Francisco due to COVID-19?

Which airlines apply social distancing measures on flights from Boston Logan Intl to San Francisco due to COVID-19?

How long does a flight from Boston to San Francisco take?

How many flights are there between Boston and San Francisco?

Which airlines provide the cheapest flights from Boston to San Francisco?

Which airlines fly most frequently between Boston and San Francisco?

What’s the cheapest day of the week to fly from Boston to San Francisco?

Which airports will I be using when flying from Boston to San Francisco?

If my pet travels with me on my trip from Boston to San Francisco where will I be able to pick it up upon arrival?

If I am being picked up at San Francisco Airport, where is the best place for my ride to meet me?

Is there a post office at San Francisco Airport?

Where can I get an Uber at San Francisco International Airport?

How does KAYAK find such low prices on flights from Boston to San Francisco?

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boston to San Francisco?

What is the Hacker Fare option on flights from Boston to San Francisco?

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boston to San Francisco?

Top airlines flying Boston Logan Intl to San Francisco

Scores according to KAYAK customer reviews

7.7
Sun Country Air
Overall score based on 9,076 reviews
8.2
Boarding
7.7
Comfort
8.4
Crew
6.8
Entertainment
7.1
Food
Airline reviews
Read more about Sun Country Air

Book cheap flights from Boston to San Francisco

Recent return flight deals

6/8
Thu
1 stop
Multiple Airlines
17h 34m
BOS - SFO
13/8
Thu
1 stop
Multiple Airlines
28h 23m
SFO - BOS
6/8
Thu
1 stop
Multiple Airlines
17h 34m
BOS - SFO
9/8
Sun
1 stop
Multiple Airlines
28h 23m
SFO - BOS
24/7
Fri
1 stop
Multiple Airlines
17h 40m
BOS - SFO
6/8
Thu
1 stop
Multiple Airlines
28h 23m
SFO - BOS
6/8
Thu
1 stop
Multiple Airlines
17h 34m
BOS - SFO
13/8
Thu
1 stop
Multiple Airlines
28h 23m
SFO - BOS
2/8
Sun
1 stop
Multiple Airlines
17h 34m
BOS - SFO
6/8
Thu
1 stop
Multiple Airlines
28h 23m
SFO - BOS
25/7
Sat
1 stop
Multiple Airlines
17h 40m
BOS - SFO
13/8
Thu
1 stop
Multiple Airlines
28h 23m
SFO - BOS
2/8
Sun
1 stop
Multiple Airlines
17h 34m
BOS - SFO
7/8
Fri
1 stop
Multiple Airlines
28h 23m
SFO - BOS
30/7
Thu
2 stops
Multiple Airlines
27h 35m
BOS - SFO
9/8
Sun
1 stop
Multiple Airlines
28h 23m
SFO - BOS
29/8
Sat
1 stop
Multiple Airlines
17h 34m
BOS - SFO
12/9
Sat
1 stop
Multiple Airlines
15h 39m
SFO - BOS
29/7
Wed
2 stops
Multiple Airlines
27h 35m
BOS - SFO
13/8
Thu
1 stop
Multiple Airlines
28h 23m
SFO - BOS
24/7
Fri
1 stop
Multiple Airlines
17h 40m
BOS - SFO
9/8
Sun
1 stop
Multiple Airlines
28h 23m
SFO - BOS
24/7
Fri
1 stop
Multiple Airlines
17h 40m
BOS - SFO
31/7
Fri
1 stop
Multiple Airlines
28h 18m
SFO - BOS
25/7
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1 stop
Multiple Airlines
17h 40m
BOS - SFO
2/8
Sun
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Multiple Airlines
32h 14m
SFO - BOS
6/8
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Multiple Airlines
17h 34m
BOS - SFO
9/8
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1 stop
Multiple Airlines
28h 23m
SFO - BOS
31/7
Fri
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Multiple Airlines
22h 16m
BOS - SFO
7/8
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Multiple Airlines
28h 23m
SFO - BOS
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Multiple Airlines
22h 16m
BOS - SFO
2/8
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2 stops
Multiple Airlines
32h 14m
SFO - BOS
30/7
Thu
1 stop
Multiple Airlines
17h 40m
BOS - SFO
6/8
Thu
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Multiple Airlines
28h 23m
SFO - BOS
25/7
Sat
1 stop
Multiple Airlines
17h 40m
BOS - SFO
4/8
Tue
2 stops
Multiple Airlines
32h 04m
SFO - BOS
24/7
Fri
1 stop
Multiple Airlines
17h 40m
BOS - SFO
31/7
Fri
2 stops
Multiple Airlines
16h 00m
SFO - BOS
6/8
Thu
1 stop
Multiple Airlines
17h 34m
BOS - SFO
17/8
Mon
2 stops
Multiple Airlines
34h 19m
SFO - BOS
Show more results

Recent one-way flight deals

30/8
Sun
1 stop
Multiple Airlines
17h 34m
BOS - SFO
12/8
Wed
1 stop
Sun Country Air
11h 41m
BOS - SFO
12/8
Wed
direct
Allegiant Air
6h 24m
BOS - SFO
25/7
Sat
1 stop
Multiple Airlines
17h 40m
BOS - SFO
1/8
Sat
1 stop
Multiple Airlines
17h 34m
BOS - SFO
25/7
Sat
2 stops
Multiple Airlines
20h 00m
BOS - SFO
30/7
Thu
2 stops
Multiple Airlines
27h 35m
BOS - SFO
26/8
Wed
2 stops
Multiple Airlines
27h 59m
BOS - SFO
12/8
Wed
2 stops
Multiple Airlines
27h 59m
BOS - SFO
19/8
Wed
2 stops
Multiple Airlines
27h 59m
BOS - SFO
5/8
Wed
2 stops
Multiple Airlines
27h 59m
BOS - SFO
26/7
Sun
1 stop
Multiple Airlines
17h 40m
BOS - SFO
16/8
Sun
1 stop
Multiple Airlines
17h 34m
BOS - SFO
8/8
Sat
2 stops
Multiple Airlines
30h 15m
BOS - SFO
13/8
Thu
1 stop
Multiple Airlines
17h 34m
BOS - SFO
25/8
Tue
2 stops
Multiple Airlines
39h 04m
BOS - SFO
12/8
Wed
2 stops
Multiple Airlines
27h 59m
BOS - SFO
28/7
Tue
2 stops
Multiple Airlines
39h 10m
BOS - SFO
24/7
Fri
3 stops
Multiple Airlines
44h 00m
BOS - SFO
27/7
Mon
3 stops
Multiple Airlines
120h 36m
BOS - SFO
Show more results
*
Prices are per person, are for e–tickets and include all taxes & fees in GBP.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

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At KAYAK we don’t set prices, so it’s not possible for us to guarantee what other companies are selling.

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Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we don't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car hires can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find on occasion that certain prices are no longer available.

More questions or if you have a bad price to report to us
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^
The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.
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