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Cheap flights from Boston to San Francisco from £101

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 29/10. 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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Cheap return flights

Frontier Logo
12:20 - 00:14BOS-SFO
14h 54m2 stops
Frontier Logo
12:43 - 07:52SFO-BOS
16h 09m2 stops
£171Frontier
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Thu, 30 Oct - Thu, 6 Nov
JetBlue Logo
15:45 - 19:34BOS-SFO
6h 49mdirect
JetBlue Logo
12:00 - 20:34SFO-BOS
5h 34mdirect
£200JetBlue
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Thu, 30 Oct - Thu, 6 Nov
JetBlue Logo
09:00 - 12:47BOS-SFO
6h 47mdirect
JetBlue Logo
15:50 - 00:30SFO-BOS
5h 40mdirect
£202JetBlue
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Wed, 22 Oct - Wed, 22 Oct
Southwest Logo
05:45 - 13:20BOS-SFO
10h 35m1 stop
Southwest Logo
21:25 - 08:15SFO-BOS
7h 50m1 stop
£204Southwest
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Wed, 19 Nov - Wed, 3 Dec
Alaska Airlines Logo
18:52 - 22:48BOS-SFO
6h 56mdirect
Alaska Airlines Logo
07:00 - 17:52SFO-BOS
7h 52m1 stop
£207Alaska Airlines
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Thu, 4 Dec - Wed, 10 Dec
Southwest Logo
14:10 - 21:15BOS-SFO
10h 05m2 stops
Southwest Logo
10:50 - 21:40SFO-BOS
7h 50m1 stop
£208Southwest
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Wed, 19 Nov - Wed, 3 Dec
Alaska Airlines Logo
16:24 - 16:46BOS-SFO
27h 22m1 stop
Alaska Airlines Logo
19:47 - 17:52SFO-BOS
19h 05m1 stop
£208Alaska Airlines
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Wed, 10 Dec - Mon, 15 Dec
Southwest Logo
05:15 - 12:10BOS-SFO
9h 55m1 stop
Southwest Logo
10:50 - 21:40SFO-BOS
7h 50m1 stop
£212Southwest
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Fri, 31 Oct - Tue, 4 Nov
United Airlines Logo
20:30 - 00:24BOS-SFO
6h 54mdirect
United Airlines Logo
13:00 - 21:38SFO-BOS
5h 38mdirect
£221United Airlines
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Mon, 27 Oct - Wed, 29 Oct
United Airlines Logo
16:15 - 19:45BOS-SFO
6h 30mdirect
United Airlines Logo
15:10 - 23:57SFO-BOS
5h 47mdirect
£224United Airlines
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Wed, 8 Oct - Sat, 11 Oct

JetBlue flights from Boston to San Francisco

Our best JetBlue deals on Boston to San Francisco flight tickets
JetBlue
30 Oct
BOS15:45Boston Logan Intl
6h 49m
SFO19:34San Francisco
6 Nov
SFO12:00San Francisco
5h 34m
BOS20:34Boston Logan Intl
£200
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JetBlue
22 Oct
BOS09:00Boston Logan Intl
6h 47m
SFO12:47San Francisco
22 Oct
SFO15:50San Francisco
5h 40m
BOS00:30Boston Logan Intl
£202
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JetBlue
17 Oct
BOS20:15Boston Logan Intl
7h 00m
SFO00:15San Francisco
21 Oct
SFO15:50San Francisco
5h 40m
BOS00:30Boston Logan Intl
£205
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Alaska Airlines flights from Boston to San Francisco

Our best Alaska Airlines deals on Boston to San Francisco flight tickets
Alaska Airlines
4 Dec
BOS18:52Boston Logan Intl
6h 56m
SFO22:48San Francisco
10 Dec
SFO07:00San Francisco
7h 52m
1 stop
BOS17:52Boston Logan Intl
£207
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Alaska Airlines
10 Dec
BOS16:24Boston Logan Intl
27h 22m
1 stop
SFO16:46San Francisco
15 Dec
SFO19:47San Francisco
19h 05m
1 stop
BOS17:52Boston Logan Intl
£208
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Alaska Airlines
17 Oct
BOS20:25Boston Logan Intl
6h 40m
SFO00:05San Francisco
20 Oct
SFO10:12San Francisco
17h 29m
1 stop
BOS06:41Boston Logan Intl
£213
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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 16 September 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

Thu 30/10

12:20-00:14

2 stops14h 54m

San Francisco

Thu 6/11

12:43-07:52

2 stops16h 09m

£171

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 30/10

15:45-19:34

Nonstop6h 49m

San Francisco

Thu 6/11

12:00-20:34

Nonstop5h 34m

£200

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 22/10

09:00-12:47

Nonstop6h 47m

San Francisco

Wed 22/10

15:50-00:30

Nonstop5h 40m

£202

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 19/11

05:45-13:20

1 stop10h 35m

San Francisco

Wed 3/12

21:25-08:15

1 stop7h 50m

£204

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 4/12

18:52-22:48

Nonstop6h 56m

San Francisco

Wed 10/12

07:00-17:52

1 stop7h 52m

£207

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 19/11

14:10-21:15

2 stops10h 05m

San Francisco

Wed 3/12

10:50-21:40

1 stop7h 50m

£208

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 10/12

16:24-16:46

1 stop27h 22m

San Francisco

Mon 15/12

19:47-17:52

1 stop19h 05m

£208

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 31/10

05:15-12:10

1 stop9h 55m

San Francisco

Tue 4/11

10:50-21:40

1 stop7h 50m

£212

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Mon 27/10

20:30-00:24

Nonstop6h 54m

San Francisco

Wed 29/10

13:00-21:38

Nonstop5h 38m

£221

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 8/10

16:15-19:45

Nonstop6h 30m

San Francisco

Sat 11/10

15:10-23:57

Nonstop5h 47m

£224

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 typical price of a round-trip flight between Boston and San Francisco?

What is the cheapest month to fly to San Francisco?

The month of January is, on average, the cheapest month to fly to San Francisco from Boston, with most prices found around £244. If you are unable to visit San Francisco during the month of January, then departing from Boston during the month March is also very affordable. Most momondo users find prices during this month for around £247.

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 £211. 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 £1,102. 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 afternoon. Flights from Boston to San Francisco during this time can be as low as £387. Try not to purchase tickets at midday because they tend to be around £706. 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 £265 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 £241 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 September 2025, prices for Boston to San Francisco flights are approximately 5% 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

Fastest flight time

6h 28m

Direct flights

Every day

Airports in San Francisco

1 airport
The fastest flight from Boston to San Francisco takes 6h 28m
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 28m 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 £145Free CancellationRating
7.2
2,912 reviews
Search JetBlue flights

  • JetBlue Flights From Boston to San Francisco

    JetBlue flight deals from Boston to San Francisco start from £197 round-trip. Over the 14 JetBlue flights for this route in a normal week, average airfare is usually £287 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
Vacaville
Salinas
Rohnert Park
Campbell
Sunnyvale
San Ramon
South San Francisco
Capitola
Palo Alto
Millbrae
San Bruno
Sausalito
Santa Cruz
Woodland
Redwood City
Burlingame
Modesto

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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