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Cheap flights from Boston to San Francisco from £102

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to San Francisco departing on 11/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Southwest Logo
17:00 - 22:30BOS-SFO
8h 30m1 stop
Southwest Logo
21:25 - 09:45SFO-BOS
9h 20m1 stop
£162Southwest
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Wed, 3 Dec - Sat, 6 Dec
United Airlines Logo
07:30 - 13:32BOS-SFO
9h 02m1 stop
United Airlines Logo
16:10 - 00:48SFO-BOS
5h 38mdirect
£163United Airlines
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Mon, 10 Nov - Fri, 14 Nov
JetBlue Logo
20:12 - 23:59BOS-SFO
6h 47mdirect
JetBlue Logo
15:20 - 23:51SFO-BOS
5h 31mdirect
£163JetBlue
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Wed, 5 Nov - Wed, 19 Nov
Southwest Logo
07:20 - 13:55BOS-SFO
9h 35m1 stop
Southwest Logo
21:30 - 08:50SFO-BOS
8h 20m1 stop
£165Southwest
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Thu, 4 Dec - Thu, 29 Jan
United Airlines Logo
06:00 - 09:45BOS-SFO
6h 45mdirect
United Airlines Logo
08:25 - 17:06SFO-BOS
5h 41mdirect
£166United Airlines
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Fri, 5 Dec - Mon, 15 Dec
JetBlue Logo
21:25 - 01:09BOS-SFO
6h 44mdirect
JetBlue Logo
07:00 - 20:07SFO-BOS
10h 07m1 stop
£168JetBlue
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Sun, 23 Nov - Sat, 6 Dec
Alaska Airlines Logo
18:52 - 22:48BOS-SFO
6h 56mdirect
Alaska Airlines Logo
07:00 - 15:37SFO-BOS
5h 37mdirect
£169Alaska Airlines
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Wed, 10 Dec - Tue, 16 Dec
Alaska Airlines Logo
18:59 - 22:50BOS-SFO
6h 51mdirect
Alaska Airlines Logo
19:25 - 07:29SFO-BOS
9h 04m1 stop
£172Alaska Airlines
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Thu, 20 Nov - Thu, 4 Dec
Delta Logo
19:55 - 23:41BOS-SFO
6h 46mdirect
Delta Logo
07:00 - 15:35SFO-BOS
5h 35mdirect
£178Delta
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Fri, 7 Nov - Mon, 10 Nov
Delta Logo
07:25 - 11:20BOS-SFO
6h 55mdirect
Delta Logo
07:00 - 15:35SFO-BOS
5h 35mdirect
£180Delta
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Thu, 20 Nov - Thu, 4 Dec

Southwest flights from Boston to San Francisco

Our best Southwest deals on Boston to San Francisco flight tickets
Southwest
3 Dec
BOS17:00Boston Logan Intl
8h 30m
1 stop
SFO22:30San Francisco
6 Dec
SFO21:25San Francisco
9h 20m
1 stop
BOS09:45Boston Logan Intl
£162
Find similar
Southwest
4 Dec
BOS07:20Boston Logan Intl
9h 35m
1 stop
SFO13:55San Francisco
29 Jan
SFO21:30San Francisco
8h 20m
1 stop
BOS08:50Boston Logan Intl
£165
Find similar
Southwest
4 Dec
BOS07:20Boston Logan Intl
9h 35m
1 stop
SFO13:55San Francisco
6 Dec
SFO06:25San Francisco
12h 30m
2 stops
BOS21:55Boston Logan Intl
£166
Find similar

United Airlines flights from Boston to San Francisco

Our best United Airlines deals on Boston to San Francisco flight tickets
United Airlines
10 Nov
BOS07:30Boston Logan Intl
9h 02m
1 stop
SFO13:32San Francisco
14 Nov
SFO16:10San Francisco
5h 38m
BOS00:48Boston Logan Intl
£163
Find similar
United Airlines
5 Dec
BOS06:00Boston Logan Intl
6h 45m
SFO09:45San Francisco
15 Dec
SFO08:25San Francisco
5h 41m
BOS17:06Boston Logan Intl
£166
Find similar
United Airlines
1 Nov
BOS10:18Boston Logan Intl
10h 11m
1 stop
SFO17:29San Francisco
5 Nov
SFO13:00San Francisco
5h 38m
BOS21:38Boston Logan Intl
£170
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momondo Fare Finder

 
Customise your flight search to find flights from Boston to San Francisco that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 24 October 2025.
Use the filters below to find and compare flights from Boston to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 3/12

17:00-22:30

1 stop8h 30m

San Francisco

Sat 6/12

21:25-09:45

1 stop9h 20m

£162

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Mon 10/11

07:30-13:32

1 stop9h 02m

San Francisco

Fri 14/11

16:10-00:48

Nonstop5h 38m

£163

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 5/11

20:12-23:59

Nonstop6h 47m

San Francisco

Wed 19/11

15:20-23:51

Nonstop5h 31m

£163

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 4/12

07:20-13:55

1 stop9h 35m

San Francisco

Thu 29/1

21:30-08:50

1 stop8h 20m

£165

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 5/12

06:00-09:45

Nonstop6h 45m

San Francisco

Mon 15/12

08:25-17:06

Nonstop5h 41m

£166

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sun 23/11

21:25-01:09

Nonstop6h 44m

San Francisco

Sat 6/12

07:00-20:07

1 stop10h 07m

£168

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 10/12

18:52-22:48

Nonstop6h 56m

San Francisco

Tue 16/12

07:00-15:37

Nonstop5h 37m

£169

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 20/11

18:59-22:50

Nonstop6h 51m

San Francisco

Thu 4/12

19:25-07:29

1 stop9h 04m

£172

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 7/11

19:55-23:41

Nonstop6h 46m

San Francisco

Mon 10/11

07:00-15:35

Nonstop5h 35m

£178

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 20/11

07:25-11:20

Nonstop6h 55m

San Francisco

Thu 4/12

07:00-15:35

Nonstop5h 35m

£180

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Francisco from

How to get the cheapest flight ticket from Boston to San Francisco

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to San Francisco?

The month of September is, on average, the cheapest month to fly to San Francisco from Boston, with most prices found around £249. If you are unable to visit San Francisco during the month of September, then departing from Boston during the month January is also very affordable. Most momondo users find prices during this month for around £252.

What is the cheapest day to depart on your flight to San Francisco?

The cheapest day to depart on your flight to San Francisco is on a Wednesday when prices can be found for as low as £215. This is often the case because there is less demand to fly during this day of the week. Flights from Boston to San Francisco on a Saturday will generally be more expensive and average around £1,657. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to San Francisco?

Our most recent data shows that the best time of day to fly to San Francisco is in the morning. Flights from Boston to San Francisco during this time can be as low as £393. Try not to purchase tickets in the afternoon because they tend to be around £751. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Boston Logan Intl to San Francisco flight route?

Fly from Boston Logan Intl to San Francisco for the best Boston Logan Intl - San Francisco flight prices

How far in advance should I book a flight to San Francisco?

You are more likely to see cheaper flights to San Francisco from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around £274 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from Boston for as low as £247 on momondo.

What cabin class options are available on Boston Logan Intl to San Francisco flights?

There are 3 cabin classes available to choose from on Boston Logan Intl to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Boston to San Francisco flight prices changed over time?

As of October 2025, prices for Boston to San Francisco flights are approximately 6% more expensive when compared to flights at the same time last year.

When to book flights from Boston to San Francisco

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to San Francisco according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Boston to San Francisco (BOS to SFO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to San Francisco

Best price found

£238

Fastest flight time

6h 44m

Direct flights

Every day

Airports in San Francisco

1 airport
The best one-way flight to San Francisco from Boston in the past 72 hours is £238. The best return flight deal from Boston to San Francisco found on momondo in the last 72 hours is £322.
The fastest flight from Boston to San Francisco takes 6h 44m
Direct flights go from Boston to San Francisco every day.
There is 1 airport near San Francisco: San Francisco (SFO)
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  • How far is Boston Logan Intl to San Francisco by plane?

    The distance between Boston Logan Intl and San Francisco is about 2690.2 mi. 6h 44m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Boston Logan Intl Airport to San Francisco Airport?

    Prices for flights from Boston Logan Intl Airport to San Francisco Airport are updated daily.

  • How many operators does momondo search for flights from Boston Logan Intl Airport to San Francisco Airport?

  • How old do you have to be to fly from Boston Logan Intl Airport to San Francisco Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Boston Logan Intl Airport to San Francisco Airport.

  • What documentation or ID do you need to fly to San Francisco Airport?

    The required travel and health documents for your San Francisco Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Francisco Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Boston to San Francisco?

  • What is the most popular airline from Boston to San Francisco?

Best airlines flying from Boston to San Francisco

Compare and see reviews for airlines that fly from Boston to San Francisco with momondo
Airline
Rating
Free Cancellation
Price
JetBluePriceFrom £147Free CancellationRating
7.2
2,908 reviews
Search JetBlue flights

  • JetBlue Flights From Boston to San Francisco

    JetBlue flight deals from Boston to San Francisco start from £147 round-trip. Over the 10 JetBlue flights for this route in a normal week, average airfare is usually £251 round-trip - but some users have found much cheaper deals with momondo.

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Carmel-by-the-Sea
Santa Clara
Seaside
Big Sur
Rohnert Park
Sunnyvale
San Ramon
South San Francisco
Capitola
Campbell
Palo Alto
Sausalito
San Bruno
Woodland
Santa Cruz
Redwood City
Burlingame
Modesto
Aptos
Fremont

Why use momondo?

Why should I use momondo to find a flight deal from Boston to San Francisco?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Francisco from Boston.

Can I find flights from Boston to San Francisco with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Boston to San Francisco flights to just show those with flexible booking policies.

How can momondo help me find flights from Boston to San Francisco?

Once all potential Boston to San Francisco flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Boston to San Francisco right now. Can momondo alert me if prices change?

If you are simply researching potential flights to San Francisco, momondo offers a useful price alert feature which will track prices for flights to San Francisco from Boston and alert you when they change.

An easier way to manage your San Francisco trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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