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Cheap flights from Boston to San Francisco from £87

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 23/2. 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
16:03 - 06:14
SFO
-
BOS
11h 11m1 stop
£170Delta
Wed, 21 Jan - Tue, 27 Jan
Delta Logo
07:30 - 17:47
BOS
-
SFO
13h 17m1 stop
Delta Logo
13:00 - 21:37
SFO
-
BOS
5h 37mdirect
£171Delta
Sat, 17 Jan - Tue, 27 Jan
Alaska Airlines Logo
17:20 - 09:11
BOS
-
SFO
18h 51m1 stop
Alaska Airlines Logo
11:41 - 17:39
SFO
-
BOS
26h 58m1 stop
£175Alaska Airlines
Fri, 30 Jan - Tue, 3 Feb
United Airlines Logo
06:00 - 09:55
BOS
-
SFO
6h 55mdirect
United Airlines Logo
08:25 - 17:13
SFO
-
BOS
5h 48mdirect
£176United Airlines
Thu, 15 Jan - Sun, 18 Jan
JetBlue Logo
15:05 - 18:55
BOS
-
SFO
6h 50mdirect
JetBlue Logo
08:00 - 23:48
SFO
-
BOS
12h 48m1 stop
£181JetBlue
Tue, 20 Jan - Tue, 27 Jan
United Airlines Logo
12:08 - 18:13
BOS
-
SFO
9h 05m1 stop
United Airlines Logo
23:25 - 08:10
SFO
-
BOS
5h 45mdirect
£183United Airlines
Fri, 23 Jan - Sun, 25 Jan
JetBlue Logo
11:10 - 17:09
BOS
-
SFO
8h 59m1 stop
JetBlue Logo
20:29 - 05:00
SFO
-
BOS
5h 31mdirect
£185JetBlue
Tue, 13 Jan - Tue, 20 Jan
Delta Logo
07:30 - 17:47
BOS
-
SFO
13h 17m1 stop
Delta Logo
07:10 - 15:51
SFO
-
BOS
5h 41mdirect
£186Delta
Sat, 17 Jan - Sun, 25 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
£188Alaska Airlines
Tue, 20 Jan - Thu, 29 Jan
United Airlines Logo
19:19 - 01:28
BOS
-
SFO
9h 09m1 stop
United Airlines Logo
16:10 - 00:49
SFO
-
BOS
5h 39mdirect
£189United Airlines
Sat, 21 Feb - Sat, 28 Feb

United Airlines flights from Boston to San Francisco

Our best United Airlines deals on Boston to San Francisco flight tickets
United Airlines
15 Jan
BOS06:00Boston Logan Intl
6h 55m
SFO09:55San Francisco
18 Jan
SFO08:25San Francisco
5h 48m
BOS17:13Boston Logan Intl
£176
Find similar
United Airlines
23 Jan
BOS13:30Boston Logan Intl
9h 25m
1 stop
SFO19:55San Francisco
30 Jan
SFO13:00San Francisco
5h 42m
BOS21:42Boston Logan Intl
£183
Find similar
United Airlines
21 Feb
BOS19:19Boston Logan Intl
9h 09m
1 stop
SFO01:28San Francisco
28 Feb
SFO16:10San Francisco
5h 39m
BOS00:49Boston Logan Intl
£189
Find similar

Alaska Airlines flights from Boston to San Francisco

Our best Alaska Airlines deals on Boston to San Francisco flight tickets
Alaska Airlines
30 Jan
BOS16:20Boston Logan Intl
9h 27m
1 stop
SFO22:47San Francisco
4 Feb
SFO07:00San Francisco
7h 39m
1 stop
BOS17:39Boston Logan Intl
£175
Find similar
Alaska Airlines
20 Jan
BOS16:20Boston Logan Intl
9h 27m
1 stop
SFO22:47San Francisco
30 Jan
SFO07:00San Francisco
7h 39m
1 stop
BOS17:39Boston Logan Intl
£188
Find similar
Alaska Airlines
30 Jan
BOS16:20Boston Logan Intl
9h 27m
1 stop
SFO22:47San Francisco
2 Feb
SFO16:46San Francisco
20h 34m
1 stop
BOS16:20Boston Logan Intl
£190
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 27 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

Wed 21/1

17:40-21:42

Nonstop7h 02m

San Francisco

Tue 27/1

16:03-06:14

1 stop11h 11m

£170

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 17/1

07:30-17:47

1 stop13h 17m

San Francisco

Tue 27/1

13:00-21:37

Nonstop5h 37m

£171

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 30/1

17:20-09:11

1 stop18h 51m

San Francisco

Tue 3/2

11:41-17:39

1 stop26h 58m

£175

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 15/1

06:00-09:55

Nonstop6h 55m

San Francisco

Sun 18/1

08:25-17:13

Nonstop5h 48m

£176

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 20/1

15:05-18:55

Nonstop6h 50m

San Francisco

Tue 27/1

08:00-23:48

1 stop12h 48m

£181

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 23/1

12:08-18:13

1 stop9h 05m

San Francisco

Sun 25/1

23:25-08:10

Nonstop5h 45m

£183

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 13/1

11:10-17:09

1 stop8h 59m

San Francisco

Tue 20/1

20:29-05:00

Nonstop5h 31m

£185

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 17/1

07:30-17:47

1 stop13h 17m

San Francisco

Sun 25/1

07:10-15:51

Nonstop5h 41m

£186

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 20/1

16:20-22:47

1 stop9h 27m

San Francisco

Thu 29/1

07:00-17:39

1 stop7h 39m

£188

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 21/2

19:19-01:28

1 stop9h 09m

San Francisco

Sat 28/2

16:10-00:49

Nonstop5h 39m

£189

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 March is, on average, the cheapest month to fly to San Francisco from Boston, with most prices found around £246. If you are unable to visit San Francisco during the month of March, then departing from Boston during the month January 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 £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 £1,637. 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 £338. Try not to purchase tickets at midday because they tend to be around £711. 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 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

Fastest flight time

6h 54m

Direct flights

Every day

Airports in San Francisco

1 airport
The fastest flight from Boston to San Francisco takes 6h 54m
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 54m 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 £168Free 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 £168 round-trip. Over the 22 JetBlue flights for this route in a normal week, average airfare is usually £338 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
Seaside
Sunnyvale
Big Sur
Carmel-by-the-Sea
Rohnert Park
Campbell
Palo Alto
Santa Cruz
Novato
South San Francisco
Capitola
Sausalito
Aptos
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.
Start using Trips
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