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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 23/1. 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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Cheap return flights

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JetBlue Logo
07:11 - 11:10
BOS
-
SFO
6h 59mdirect
JetBlue Logo
12:59 - 21:37
SFO
-
BOS
5h 38mdirect
£167JetBlue
Thu, 5 Feb - Thu, 12 Feb
United Airlines Logo
13:50 - 17:45
BOS
-
SFO
6h 55mdirect
United Airlines Logo
21:30 - 09:14
SFO
-
BOS
8h 44m1 stop
£170United Airlines
Tue, 20 Jan - Tue, 27 Jan
Multiple Airlines Logo
16:20 - 22:47
BOS
-
SFO
9h 27m1 stop
Multiple Airlines Logo
15:25 - 23:58
SFO
-
BOS
5h 33mdirect
£173Multiple Airlines
Thu, 5 Feb - Thu, 12 Feb
United Airlines Logo
10:56 - 14:51
BOS
-
SFO
6h 55mdirect
United Airlines Logo
23:55 - 10:55
SFO
-
BOS
8h 00m1 stop
£175United Airlines
Wed, 11 Feb - Sat, 14 Feb
JetBlue Logo
09:25 - 13:19
BOS
-
SFO
6h 54mdirect
JetBlue Logo
20:41 - 05:12
SFO
-
BOS
5h 31mdirect
£176JetBlue
Tue, 3 Feb - Tue, 17 Feb
Alaska Airlines Logo
16:20 - 22:47
BOS
-
SFO
9h 27m1 stop
Alaska Airlines Logo
18:56 - 15:20
SFO
-
BOS
17h 24m1 stop
£176Alaska Airlines
Tue, 3 Feb - Sat, 7 Feb
United Airlines Logo
06:00 - 09:55
BOS
-
SFO
6h 55mdirect
United Airlines Logo
13:00 - 21:42
SFO
-
BOS
5h 42mdirect
£177United Airlines
Fri, 16 Jan - Sun, 18 Jan
JetBlue Logo
10:41 - 17:09
BOS
-
SFO
9h 28m1 stop
JetBlue Logo
20:29 - 05:00
SFO
-
BOS
5h 31mdirect
£179JetBlue
Tue, 13 Jan - Tue, 13 Jan
Delta Logo
07:30 - 17:47
BOS
-
SFO
13h 17m1 stop
Delta Logo
07:10 - 15:51
SFO
-
BOS
5h 41mdirect
£180Delta
Sat, 17 Jan - Wed, 21 Jan
Southwest Logo
16:50 - 22:20
BOS
-
SFO
8h 30m1 stop
Southwest Logo
09:50 - 22:30
SFO
-
BOS
9h 40m1 stop
£181Southwest
Mon, 12 Jan - Tue, 20 Jan

United Airlines flights from Boston to San Francisco

Our best United Airlines deals on Boston to San Francisco flight tickets
United Airlines
20 Jan
BOS13:50Boston Logan Intl
6h 55m
SFO17:45San Francisco
27 Jan
SFO21:30San Francisco
8h 44m
1 stop
BOS09:14Boston Logan Intl
£170
Find similar
United Airlines
11 Feb
BOS10:56Boston Logan Intl
6h 55m
SFO14:51San Francisco
14 Feb
SFO23:55San Francisco
8h 00m
1 stop
BOS10:55Boston Logan Intl
£175
Find similar
United Airlines
16 Jan
BOS07:55Boston Logan Intl
6h 55m
SFO11:50San Francisco
23 Jan
SFO23:25San Francisco
5h 45m
BOS08:10Boston Logan Intl
£177
Find similar

JetBlue flights from Boston to San Francisco

Our best JetBlue deals on Boston to San Francisco flight tickets
JetBlue
5 Feb
BOS07:11Boston Logan Intl
6h 59m
SFO11:10San Francisco
12 Feb
SFO12:59San Francisco
5h 38m
BOS21:37Boston Logan Intl
£167
Find similar
JetBlue
3 Feb
BOS09:25Boston Logan Intl
6h 54m
SFO13:19San Francisco
17 Feb
SFO20:41San Francisco
5h 31m
BOS05:12Boston Logan Intl
£176
Find similar
JetBlue
13 Jan
BOS10:41Boston Logan Intl
9h 28m
1 stop
SFO17:09San Francisco
13 Jan
SFO20:29San Francisco
5h 31m
BOS05:00Boston Logan Intl
£179
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 22 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

Thu 5/2

07:11-11:10

Nonstop6h 59m

San Francisco

Thu 12/2

12:59-21:37

Nonstop5h 38m

£167

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 20/1

13:50-17:45

Nonstop6h 55m

San Francisco

Tue 27/1

21:30-09:14

1 stop8h 44m

£170

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 5/2

16:20-22:47

1 stop9h 27m

San Francisco

Thu 12/2

15:25-23:58

Nonstop5h 33m

£173

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 11/2

10:56-14:51

Nonstop6h 55m

San Francisco

Sat 14/2

23:55-10:55

1 stop8h 00m

£175

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 3/2

09:25-13:19

Nonstop6h 54m

San Francisco

Tue 17/2

20:41-05:12

Nonstop5h 31m

£176

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 3/2

16:20-22:47

1 stop9h 27m

San Francisco

Sat 7/2

18:56-15:20

1 stop17h 24m

£176

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 16/1

06:00-09:55

Nonstop6h 55m

San Francisco

Sun 18/1

13:00-21:42

Nonstop5h 42m

£177

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 13/1

10:41-17:09

1 stop9h 28m

San Francisco

Tue 13/1

20:29-05:00

Nonstop5h 31m

£179

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 17/1

07:30-17:47

1 stop13h 17m

San Francisco

Wed 21/1

07:10-15:51

Nonstop5h 41m

£180

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Mon 12/1

16:50-22:20

1 stop8h 30m

San Francisco

Tue 20/1

09:50-22:30

1 stop9h 40m

£181

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 £248. 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 £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 £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 £1,652. 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 £717. 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 £274 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
2,896 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 15 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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