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Cheap flights from Boston to San Francisco from £83

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 31/3. 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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Alaska Airlines Logo
16:36 - 23:44
BOS
-
SFO
10h 08m
1 stop
Alaska Airlines Logo
06:40 - 17:24
SFO
-
BOS
7h 44m
1 stop
£158Alaska Airlines
Fri, 20 Feb - Wed, 25 Feb
Alaska Airlines Logo
16:36 - 23:44
BOS
-
SFO
10h 08m
1 stop
Alaska Airlines Logo
06:40 - 17:24
SFO
-
BOS
7h 44m
1 stop
£159Alaska Airlines
Thu, 19 Feb - Wed, 25 Feb
United Airlines Logo
11:51 - 18:16
BOS
-
SFO
9h 25m
1 stop
United Airlines Logo
23:20 - 07:58
SFO
-
BOS
5h 38mdirect
£162United Airlines
Tue, 24 Feb - Tue, 3 Mar
Alaska Airlines Logo
16:36 - 23:44
BOS
-
SFO
10h 08m
1 stop
Alaska Airlines Logo
11:34 - 23:59
SFO
-
BOS
9h 25m
1 stop
£162Alaska Airlines
Thu, 19 Feb - Tue, 24 Feb
Delta Logo
17:20 - 21:13
BOS
-
SFO
6h 53mdirect
Delta Logo
07:25 - 15:57
SFO
-
BOS
5h 32mdirect
£165Delta
Tue, 17 Mar - Tue, 24 Mar
Delta Logo
07:45 - 11:47
BOS
-
SFO
7h 02mdirect
Delta Logo
11:02 - 05:40
SFO
-
BOS
15h 38m
1 stop
£167Delta
Tue, 24 Feb - Tue, 3 Mar
Delta Logo
07:40 - 11:38
BOS
-
SFO
6h 58mdirect
Delta Logo
13:05 - 05:32
SFO
-
BOS
13h 27m
1 stop
£168Delta
Tue, 10 Mar - Tue, 17 Mar
JetBlue Logo
20:33 - 00:25
BOS
-
SFO
6h 52mdirect
JetBlue Logo
12:30 - 21:08
SFO
-
BOS
5h 38mdirect
£169JetBlue
Fri, 20 Feb - Tue, 24 Feb
United Airlines Logo
18:07 - 00:15
BOS
-
SFO
9h 08m
1 stop
United Airlines Logo
21:30 - 06:08
SFO
-
BOS
5h 38mdirect
£170United Airlines
Sat, 28 Feb - Thu, 5 Mar
Delta Logo
07:15 - 15:51
BOS
-
SFO
11h 36m
1 stop
Delta Logo
13:00 - 21:35
SFO
-
BOS
5h 35mdirect
£171Delta
Thu, 26 Feb - Wed, 4 Mar

Delta flights from Boston to San Francisco

Our best Delta deals on Boston to San Francisco flight tickets
Delta
17 Mar
BOS07:40Boston Logan Intl
6h 58m
SFO11:38San Francisco
24 Mar
SFO07:25San Francisco
5h 32m
BOS15:57Boston Logan Intl
£165
Delta
24 Feb
BOS07:45Boston Logan Intl
7h 02m
SFO11:47San Francisco
3 Mar
SFO11:02San Francisco
15h 38m
1 stop
BOS05:40Boston Logan Intl
£167
Delta
10 Mar
BOS07:40Boston Logan Intl
6h 58m
SFO11:38San Francisco
17 Mar
SFO13:05San Francisco
13h 27m
1 stop
BOS05:32Boston Logan Intl
£168

United Airlines flights from Boston to San Francisco

Our best United Airlines deals on Boston to San Francisco flight tickets
United Airlines
24 Feb
BOS11:51Boston Logan Intl
9h 25m
1 stop
SFO18:16San Francisco
3 Mar
SFO23:20San Francisco
5h 38m
BOS07:58Boston Logan Intl
£162
United Airlines
28 Feb
BOS18:07Boston Logan Intl
9h 08m
1 stop
SFO00:15San Francisco
2 Mar
SFO16:10San Francisco
5h 39m
BOS00:49Boston Logan Intl
£170
United Airlines
20 Feb
BOS06:00Boston Logan Intl
6h 58m
SFO09:58San Francisco
25 Feb
SFO08:25San Francisco
5h 37m
BOS17:02Boston Logan Intl
£172

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 31 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 20/2

16:36-23:44

1 stop10h 08m

San Francisco

Wed 25/2

06:40-17:24

1 stop7h 44m

£158

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 19/2

16:36-23:44

1 stop10h 08m

San Francisco

Wed 25/2

06:40-17:24

1 stop7h 44m

£159

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 24/2

11:51-18:16

1 stop9h 25m

San Francisco

Tue 3/3

23:20-07:58

Nonstop5h 38m

£162

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 19/2

16:36-23:44

1 stop10h 08m

San Francisco

Tue 24/2

11:34-23:59

1 stop9h 25m

£162

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 17/3

17:20-21:13

Nonstop6h 53m

San Francisco

Tue 24/3

07:25-15:57

Nonstop5h 32m

£165

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 24/2

07:45-11:47

Nonstop7h 02m

San Francisco

Tue 3/3

11:02-05:40

1 stop15h 38m

£167

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 10/3

07:40-11:38

Nonstop6h 58m

San Francisco

Tue 17/3

13:05-05:32

1 stop13h 27m

£168

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 20/2

20:33-00:25

Nonstop6h 52m

San Francisco

Tue 24/2

12:30-21:08

Nonstop5h 38m

£169

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 28/2

18:07-00:15

1 stop9h 08m

San Francisco

Thu 5/3

21:30-06:08

Nonstop5h 38m

£170

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 26/2

07:15-15:51

1 stop11h 36m

San Francisco

Wed 4/3

13:00-21:35

Nonstop5h 35m

£171

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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2

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 March is, on average, the cheapest month to fly to San Francisco from Boston, with most prices found around £242. If you are unable to visit San Francisco during the month of March, then departing from Boston during the month September is also very affordable. Most momondo users find prices during this month for around £245.

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 Friday when prices can be found for as low as £223. 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 £1,635. 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 £333. Try not to purchase tickets at midday because they tend to be around £699. 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 £268 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 £229 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 50m

Direct flights

Every day

Airports in San Francisco

1 airport
The fastest flight from Boston to San Francisco takes 6h 50m
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 50m 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 £177Free CancellationRating
7.2
2,891 reviews
Search JetBlue flights

  • JetBlue Flights From Boston to San Francisco

    JetBlue flight deals from Boston to San Francisco start from £177 round-trip. Over the 23 JetBlue flights for this route in a normal week, average airfare is usually £333 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
Campbell
Palo Alto
Santa Cruz
Roseville
Novato
South San Francisco
Capitola
Aptos
Sausalito
San Bruno
Woodland
Redwood City
Pacific Grove
Mill Valley
Burlingame

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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