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Cheap flights from Boston to San Francisco from £89

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 18/3. 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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Delta Logo
17:40 - 21:42
BOS
-
SFO
7h 02mdirect
Delta Logo
07:10 - 15:51
SFO
-
BOS
5h 41mdirect
£166Delta
Sat, 17 Jan - Tue, 20 Jan
Southwest Logo
14:40 - 22:20
BOS
-
SFO
10h 40m2 stops
Southwest Logo
07:40 - 22:30
SFO
-
BOS
11h 50m2 stops
£168Southwest
Tue, 20 Jan - Wed, 21 Jan
Southwest Logo
05:50 - 13:25
BOS
-
SFO
10h 35m1 stop
Southwest Logo
21:30 - 08:50
SFO
-
BOS
8h 20m1 stop
£169Southwest
Tue, 13 Jan - Thu, 22 Jan
Alaska Airlines Logo
16:20 - 22:47
BOS
-
SFO
9h 27m1 stop
Alaska Airlines Logo
07:00 - 17:39
SFO
-
BOS
7h 39m1 stop
£169Alaska Airlines
Tue, 13 Jan - Tue, 27 Jan
Southwest Logo
05:15 - 11:15
BOS
-
SFO
9h 00m1 stop
Southwest Logo
21:30 - 08:20
SFO
-
BOS
7h 50m1 stop
£170Southwest
Sat, 21 Feb - Sat, 28 Feb
Southwest Logo
09:35 - 18:05
BOS
-
SFO
11h 30m2 stops
Southwest Logo
07:40 - 22:05
SFO
-
BOS
11h 25m2 stops
£172Southwest
Wed, 7 Jan - Wed, 21 Jan
Delta Logo
10:05 - 20:58
BOS
-
SFO
13h 53m1 stop
Delta Logo
07:10 - 15:51
SFO
-
BOS
5h 41mdirect
£172Delta
Thu, 15 Jan - Tue, 20 Jan
United Airlines Logo
12:45 - 19:09
BOS
-
SFO
9h 24m1 stop
United Airlines Logo
16:10 - 00:52
SFO
-
BOS
5h 42mdirect
£173United Airlines
Tue, 13 Jan - Mon, 19 Jan
United Airlines Logo
11:17 - 17:50
BOS
-
SFO
9h 33m1 stop
United Airlines Logo
13:00 - 21:42
SFO
-
BOS
5h 42mdirect
£174United Airlines
Sat, 17 Jan - Tue, 20 Jan
Southwest Logo
06:50 - 14:20
BOS
-
SFO
10h 30m2 stops
Southwest Logo
06:05 - 20:50
SFO
-
BOS
11h 45m2 stops
£175Southwest
Mon, 12 Jan - Wed, 14 Jan

Southwest flights from Boston to San Francisco

Our best Southwest deals on Boston to San Francisco flight tickets
Southwest
20 Jan
BOS14:40Boston Logan Intl
10h 40m
2 stops
SFO22:20San Francisco
21 Jan
SFO07:40San Francisco
11h 50m
2 stops
BOS22:30Boston Logan Intl
£168
Find similar
Southwest
13 Jan
BOS05:50Boston Logan Intl
10h 35m
1 stop
SFO13:25San Francisco
22 Jan
SFO21:30San Francisco
8h 20m
1 stop
BOS08:50Boston Logan Intl
£169
Find similar
Southwest
7 Jan
BOS09:35Boston Logan Intl
11h 30m
2 stops
SFO18:05San Francisco
21 Jan
SFO07:40San Francisco
11h 25m
2 stops
BOS22:05Boston Logan Intl
£172
Find similar

Delta flights from Boston to San Francisco

Our best Delta deals on Boston to San Francisco flight tickets
Delta
7 Jan
BOS07:50Boston Logan Intl
7h 00m
SFO11:50San Francisco
11 Jan
SFO07:10San Francisco
5h 41m
BOS15:51Boston Logan Intl
£170
Find similar
Delta
15 Jan
BOS17:40Boston Logan Intl
7h 02m
SFO21:42San Francisco
19 Jan
SFO16:05San Francisco
12h 28m
1 stop
BOS07:33Boston Logan Intl
£172
Find similar
Delta
10 Feb
BOS07:50Boston Logan Intl
7h 00m
SFO11:50San Francisco
16 Feb
SFO07:10San Francisco
5h 39m
BOS15:49Boston Logan Intl
£176
Find similar

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 5 December 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

Sat 17/1

17:40-21:42

Nonstop7h 02m

San Francisco

Tue 20/1

07:10-15:51

Nonstop5h 41m

£166

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 20/1

14:40-22:20

2 stops10h 40m

San Francisco

Wed 21/1

07:40-22:30

2 stops11h 50m

£168

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 13/1

05:50-13:25

1 stop10h 35m

San Francisco

Thu 22/1

21:30-08:50

1 stop8h 20m

£169

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 13/1

16:20-22:47

1 stop9h 27m

San Francisco

Tue 27/1

07:00-17:39

1 stop7h 39m

£169

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 21/2

05:15-11:15

1 stop9h 00m

San Francisco

Sat 28/2

21:30-08:20

1 stop7h 50m

£170

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 7/1

09:35-18:05

2 stops11h 30m

San Francisco

Wed 21/1

07:40-22:05

2 stops11h 25m

£172

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 15/1

10:05-20:58

1 stop13h 53m

San Francisco

Tue 20/1

07:10-15:51

Nonstop5h 41m

£172

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 13/1

12:45-19:09

1 stop9h 24m

San Francisco

Mon 19/1

16:10-00:52

Nonstop5h 42m

£173

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 17/1

11:17-17:50

1 stop9h 33m

San Francisco

Tue 20/1

13:00-21:42

Nonstop5h 42m

£174

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Mon 12/1

06:50-14:20

2 stops10h 30m

San Francisco

Wed 14/1

06:05-20:50

2 stops11h 45m

£175

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 £247. 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 £249.

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 evening. Flights from Boston to San Francisco during this time can be as low as £342. Try not to purchase tickets at midday because they tend to be around £719. 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 £273 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 £240 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 December 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

£85

Fastest flight time

6h 55m

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 £85. The best return flight deal from Boston to San Francisco found on momondo in the last 72 hours is £342.
The fastest flight from Boston to San Francisco takes 6h 55m
Direct flights go from Boston to San Francisco every day.
There is 1 airport near San Francisco: 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 39m 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 £170Free CancellationRating
7.2
2,899 reviews
Search JetBlue flights

  • JetBlue Flights From Boston to San Francisco

    JetBlue flight deals from Boston to San Francisco start from £170 round-trip. Over the 11 JetBlue flights for this route in a normal week, average airfare is usually £322 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
Santa Clara
Carmel-by-the-Sea
Seaside
Big Sur
Rohnert Park
Campbell
Palo Alto
South San Francisco
Capitola
Santa Cruz
Novato
Sausalito
San Bruno
Woodland
Redwood City
Aptos
Burlingame
Modesto
Pacific Grove
Sunnyvale

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.
Start using Trips
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