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Cheap flights from Boston to San Francisco from £88

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 1/3. 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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United Airlines Logo
05:45 - 11:23
BOS
-
SFO
8h 38m1 stop
United Airlines Logo
11:05 - 19:51
SFO
-
BOS
5h 46mdirect
£171United Airlines
Fri, 6 Feb - Tue, 10 Feb
United Airlines Logo
07:55 - 11:50
BOS
-
SFO
6h 55mdirect
United Airlines Logo
21:30 - 09:14
SFO
-
BOS
8h 44m1 stop
£172United Airlines
Sat, 17 Jan - Tue, 20 Jan
Delta Logo
05:50 - 13:48
BOS
-
SFO
10h 58m1 stop
Delta Logo
13:00 - 21:35
SFO
-
BOS
5h 35mdirect
£173Delta
Sat, 28 Feb - Mon, 2 Mar
Delta Logo
07:45 - 11:47
BOS
-
SFO
7h 02mdirect
Delta Logo
13:00 - 21:35
SFO
-
BOS
5h 35mdirect
£174Delta
Fri, 20 Feb - Wed, 25 Feb
Southwest Logo
06:50 - 14:20
BOS
-
SFO
10h 30m2 stops
Southwest Logo
06:05 - 20:50
SFO
-
BOS
11h 45m2 stops
£175Southwest
Wed, 28 Jan - Tue, 3 Feb
Alaska Airlines Logo
17:44 - 23:59
BOS
-
SFO
9h 15m1 stop
Alaska Airlines Logo
18:27 - 06:54
SFO
-
BOS
9h 27m1 stop
£176Alaska Airlines
Thu, 19 Feb - Mon, 2 Mar
United Airlines Logo
10:56 - 14:51
BOS
-
SFO
6h 55mdirect
United Airlines Logo
12:55 - 23:49
SFO
-
BOS
7h 54m1 stop
£176United Airlines
Thu, 22 Jan - Fri, 23 Jan
Southwest Logo
06:50 - 14:20
BOS
-
SFO
10h 30m2 stops
Southwest Logo
13:00 - 23:50
SFO
-
BOS
7h 50m1 stop
£177Southwest
Wed, 25 Feb - Fri, 27 Feb
JetBlue Logo
07:11 - 11:10
BOS
-
SFO
6h 59mdirect
JetBlue Logo
20:40 - 05:11
SFO
-
BOS
5h 31mdirect
£179JetBlue
Sun, 8 Feb - Sun, 15 Feb
United Airlines Logo
07:55 - 11:50
BOS
-
SFO
6h 55mdirect
United Airlines Logo
22:35 - 10:36
SFO
-
BOS
9h 01m1 stop
£179United Airlines
Tue, 20 Jan - Sun, 25 Jan

JetBlue flights from Boston to San Francisco

Our best JetBlue deals on Boston to San Francisco flight tickets
JetBlue
25 Feb
BOS16:40Boston Logan Intl
6h 49m
SFO20:29San Francisco
1 Mar
SFO15:25San Francisco
5h 33m
BOS23:58Boston Logan Intl
£177
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JetBlue
8 Feb
BOS07:11Boston Logan Intl
6h 59m
SFO11:10San Francisco
15 Feb
SFO20:40San Francisco
5h 31m
BOS05:11Boston Logan Intl
£179
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JetBlue
19 Feb
BOS12:32Boston Logan Intl
9h 58m
1 stop
SFO19:30San Francisco
25 Feb
SFO20:44San Francisco
5h 31m
BOS05:15Boston Logan Intl
£180
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Southwest flights from Boston to San Francisco

Our best Southwest deals on Boston to San Francisco flight tickets
Southwest
28 Jan
BOS06:50Boston Logan Intl
10h 30m
2 stops
SFO14:20San Francisco
3 Feb
SFO06:05San Francisco
11h 45m
2 stops
BOS20:50Boston Logan Intl
£175
Find similar
Southwest
21 Feb
BOS05:15Boston Logan Intl
9h 00m
1 stop
SFO11:15San Francisco
24 Feb
SFO17:50San Francisco
12h 00m
2 stops
BOS08:50Boston Logan Intl
£193
Find similar
Southwest
28 Jan
BOS06:50Boston Logan Intl
10h 30m
2 stops
SFO14:20San Francisco
1 Feb
SFO05:50San Francisco
7h 40m
1 stop
BOS16:30Boston Logan Intl
£194
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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 8 January 2026.
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

Fri 6/2

05:45-11:23

1 stop8h 38m

San Francisco

Tue 10/2

11:05-19:51

Nonstop5h 46m

£171

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 17/1

07:55-11:50

Nonstop6h 55m

San Francisco

Tue 20/1

21:30-09:14

1 stop8h 44m

£172

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 28/2

05:50-13:48

1 stop10h 58m

San Francisco

Mon 2/3

13:00-21:35

Nonstop5h 35m

£173

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 20/2

07:45-11:47

Nonstop7h 02m

San Francisco

Wed 25/2

13:00-21:35

Nonstop5h 35m

£174

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 28/1

06:50-14:20

2 stops10h 30m

San Francisco

Tue 3/2

06:05-20:50

2 stops11h 45m

£175

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 19/2

17:44-23:59

1 stop9h 15m

San Francisco

Mon 2/3

18:27-06:54

1 stop9h 27m

£176

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 22/1

10:56-14:51

Nonstop6h 55m

San Francisco

Fri 23/1

12:55-23:49

1 stop7h 54m

£176

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 25/2

06:50-14:20

2 stops10h 30m

San Francisco

Fri 27/2

13:00-23:50

1 stop7h 50m

£177

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sun 8/2

07:11-11:10

Nonstop6h 59m

San Francisco

Sun 15/2

20:40-05:11

Nonstop5h 31m

£179

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 20/1

07:55-11:50

Nonstop6h 55m

San Francisco

Sun 25/1

22:35-10:36

1 stop9h 01m

£179

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 £245. If you are unable to visit San Francisco during the month of September, then departing from Boston during the month March is also very affordable. Most momondo users find prices during this month for around £246.

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 £212. 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 £1,639. 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 evening. Flights from Boston to San Francisco during this time can be as low as £339. Try not to purchase tickets at midday because they tend to be around £712. 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 £272 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 £242 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 January 2026, prices for Boston to San Francisco flights are approximately 13% cheaper 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

Fastest flight time

6h 59m

Direct flights

Every day

Airports in San Francisco

1 airport
The fastest flight from Boston to San Francisco takes 6h 59m
Direct flights go from Boston to San Francisco every day.
There is 1 airport in San Francisco. From Boston there are direct flights to San Francisco (SFO).
Search flight deals

  • 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 59m 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 £179Free CancellationRating
7.2
2,893 reviews
Search JetBlue flights

  • JetBlue Flights From Boston to San Francisco

    JetBlue flight deals from Boston to San Francisco start from £179 round-trip. Over the 17 JetBlue flights for this route in a normal week, average airfare is usually £339 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
Sunnyvale
Santa Clara
Seaside
Big Sur
Rohnert Park
Carmel-by-the-Sea
Campbell
Palo Alto
Santa Cruz
Novato
South San Francisco
Capitola
Aptos
Sausalito
San Bruno
Woodland
Redwood City
Pacific Grove
Burlingame
Mill Valley

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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