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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 12/1. 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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0 bags

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Alaska Airlines Logo
16:20 - 22:47
BOS
-
SFO
9h 27m1 stop
Alaska Airlines Logo
10:16 - 17:39
SFO
-
BOS
28h 23m1 stop
£169Alaska Airlines
Wed, 14 Jan - Tue, 20 Jan
United Airlines Logo
07:55 - 11:48
BOS
-
SFO
6h 53mdirect
United Airlines Logo
00:43 - 12:19
SFO
-
BOS
8h 36m1 stop
£169United Airlines
Wed, 7 Jan - Thu, 8 Jan
JetBlue Logo
15:05 - 18:55
BOS
-
SFO
6h 50mdirect
JetBlue Logo
15:25 - 23:58
SFO
-
BOS
5h 33mdirect
£173JetBlue
Fri, 30 Jan - Fri, 6 Feb
Alaska Airlines Logo
16:20 - 22:47
BOS
-
SFO
9h 27m1 stop
Alaska Airlines Logo
07:00 - 23:54
SFO
-
BOS
13h 54m1 stop
£176Alaska Airlines
Wed, 21 Jan - Sat, 31 Jan
United Airlines Logo
08:25 - 15:12
BOS
-
SFO
9h 47m1 stop
United Airlines Logo
08:25 - 17:13
SFO
-
BOS
5h 48mdirect
£177United Airlines
Fri, 30 Jan - Tue, 3 Feb
United Airlines Logo
07:55 - 11:48
BOS
-
SFO
6h 53mdirect
United Airlines Logo
16:10 - 00:49
SFO
-
BOS
5h 39mdirect
£178United Airlines
Wed, 11 Feb - Thu, 12 Feb
Delta Logo
07:50 - 11:50
BOS
-
SFO
7h 00mdirect
Delta Logo
07:10 - 15:49
SFO
-
BOS
5h 39mdirect
£179Delta
Wed, 11 Feb - Tue, 17 Feb
JetBlue Logo
05:12 - 14:12
BOS
-
SFO
12h 00m1 stop
JetBlue Logo
08:26 - 17:05
SFO
-
BOS
5h 39mdirect
£183JetBlue
Wed, 21 Jan - Wed, 4 Feb
Alaska Airlines Logo
16:20 - 22:47
BOS
-
SFO
9h 27m1 stop
Alaska Airlines Logo
07:00 - 17:39
SFO
-
BOS
7h 39m1 stop
£184Alaska Airlines
Fri, 30 Jan - Wed, 4 Feb
JetBlue Logo
19:09 - 22:59
BOS
-
SFO
6h 50mdirect
JetBlue Logo
20:30 - 05:01
SFO
-
BOS
5h 31mdirect
£184JetBlue
Thu, 29 Jan - Sun, 1 Feb

United Airlines flights from Boston to San Francisco

Our best United Airlines deals on Boston to San Francisco flight tickets
United Airlines
7 Jan
BOS07:55Boston Logan Intl
6h 53m
SFO11:48San Francisco
8 Jan
SFO00:43San Francisco
8h 36m
1 stop
BOS12:19Boston Logan Intl
£169
Find similar
United Airlines
30 Jan
BOS08:25Boston Logan Intl
9h 47m
1 stop
SFO15:12San Francisco
3 Feb
SFO08:25San Francisco
5h 48m
BOS17:13Boston Logan Intl
£177
Find similar
United Airlines
11 Feb
BOS07:55Boston Logan Intl
6h 53m
SFO11:48San Francisco
12 Feb
SFO16:10San Francisco
5h 39m
BOS00:49Boston Logan Intl
£178
Find similar

JetBlue flights from Boston to San Francisco

Our best JetBlue deals on Boston to San Francisco flight tickets
JetBlue
30 Jan
BOS15:05Boston Logan Intl
6h 50m
SFO18:55San Francisco
6 Feb
SFO15:25San Francisco
5h 33m
BOS23:58Boston Logan Intl
£173
Find similar
JetBlue
21 Jan
BOS05:12Boston Logan Intl
12h 00m
1 stop
SFO14:12San Francisco
4 Feb
SFO08:26San Francisco
5h 39m
BOS17:05Boston Logan Intl
£183
Find similar
JetBlue
21 Jan
BOS10:41Boston Logan Intl
9h 28m
1 stop
SFO17:09San Francisco
28 Jan
SFO08:26San Francisco
5h 39m
BOS17:05Boston Logan Intl
£187
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 17 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 14/1

16:20-22:47

1 stop9h 27m

San Francisco

Tue 20/1

10:16-17:39

1 stop28h 23m

£169

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 7/1

07:55-11:48

Nonstop6h 53m

San Francisco

Thu 8/1

00:43-12:19

1 stop8h 36m

£169

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 30/1

15:05-18:55

Nonstop6h 50m

San Francisco

Fri 6/2

15:25-23:58

Nonstop5h 33m

£173

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 21/1

16:20-22:47

1 stop9h 27m

San Francisco

Sat 31/1

07:00-23:54

1 stop13h 54m

£176

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 30/1

08:25-15:12

1 stop9h 47m

San Francisco

Tue 3/2

08:25-17:13

Nonstop5h 48m

£177

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 11/2

07:55-11:48

Nonstop6h 53m

San Francisco

Thu 12/2

16:10-00:49

Nonstop5h 39m

£178

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 11/2

07:50-11:50

Nonstop7h 00m

San Francisco

Tue 17/2

07:10-15:49

Nonstop5h 39m

£179

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 21/1

05:12-14:12

1 stop12h 00m

San Francisco

Wed 4/2

08:26-17:05

Nonstop5h 39m

£183

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 30/1

16:20-22:47

1 stop9h 27m

San Francisco

Wed 4/2

07:00-17:39

1 stop7h 39m

£184

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 29/1

19:09-22:59

Nonstop6h 50m

San Francisco

Sun 1/2

20:30-05:01

Nonstop5h 31m

£184

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 January is, on average, the cheapest month to fly to San Francisco from Boston, with most prices found around £248. 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 £248.

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 £214. 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 £1,649. 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 £341. Try not to purchase tickets at midday because they tend to be around £716. 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 £244 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 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 £169Free CancellationRating
7.2
2,895 reviews
Search JetBlue flights

  • JetBlue Flights From Boston to San Francisco

    JetBlue flight deals from Boston to San Francisco start from £169 round-trip. Over the 8 JetBlue flights for this route in a normal week, average airfare is usually £321 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
Sunnyvale
Big Sur
Rohnert Park
Campbell
Palo Alto
Santa Cruz
South San Francisco
Capitola
Novato
Sausalito
San Bruno
Woodland
Aptos
Redwood City
Pacific Grove
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.
Start using Trips
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