Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Boston to San Francisco from £91

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 15/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Boston to San Francisco

Cheap return flights

Enter your travel dates to find the best prices.
JetBlue Logo
19:09 - 22:59BOS-SFO
6h 50mdirect
JetBlue Logo
12:20 - 20:58SFO-BOS
5h 38mdirect
£173JetBlue
Find Deal
Tue, 20 Jan - Tue, 27 Jan
Delta Logo
20:05 - 23:59BOS-SFO
6h 54mdirect
Delta Logo
07:10 - 15:51SFO-BOS
5h 41mdirect
£177Delta
Find Deal
Mon, 15 Dec - Wed, 28 Jan
Delta Logo
17:40 - 21:42BOS-SFO
7h 02mdirect
Delta Logo
07:10 - 15:51SFO-BOS
5h 41mdirect
£181Delta
Find Deal
Sat, 17 Jan - Sat, 24 Jan
JetBlue Logo
19:45 - 23:38BOS-SFO
6h 53mdirect
JetBlue Logo
20:29 - 05:00SFO-BOS
5h 31mdirect
£182JetBlue
Find Deal
Sat, 17 Jan - Sat, 24 Jan
Delta Logo
07:50 - 11:50BOS-SFO
7h 00mdirect
Delta Logo
13:00 - 21:37SFO-BOS
5h 37mdirect
£185Delta
Find Deal
Fri, 30 Jan - Wed, 4 Feb
JetBlue Logo
06:45 - 10:33BOS-SFO
6h 48mdirect
JetBlue Logo
15:22 - 23:55SFO-BOS
5h 33mdirect
£186JetBlue
Find Deal
Tue, 16 Dec - Thu, 25 Dec
Alaska Airlines Logo
16:20 - 22:47BOS-SFO
9h 27m1 stop
Alaska Airlines Logo
17:02 - 17:39SFO-BOS
21h 37m1 stop
£188Alaska Airlines
Find Deal
Wed, 14 Jan - Tue, 20 Jan
Alaska Airlines Logo
18:52 - 22:48BOS-SFO
6h 56mdirect
Alaska Airlines Logo
12:56 - 00:23SFO-BOS
8h 27m1 stop
£189Alaska Airlines
Find Deal
Sun, 14 Dec - Tue, 6 Jan
American Airlines Logo
09:45 - 17:24BOS-SFO
10h 39m1 stop
American Airlines Logo
00:17 - 11:31SFO-BOS
8h 14m1 stop
£189American Airlines
Find Deal
Wed, 7 Jan - Tue, 13 Jan
JetBlue Logo
07:00 - 10:59BOS-SFO
6h 59mdirect
JetBlue Logo
20:41 - 05:12SFO-BOS
5h 31mdirect
£191JetBlue
Find Deal
Wed, 11 Feb - Mon, 23 Feb

Southwest flights from Boston to San Francisco

Our best Southwest deals on Boston to San Francisco flight tickets
Southwest
17 Jan
BOS05:10Boston Logan Intl
9h 25m
1 stop
SFO11:35San Francisco
24 Jan
SFO07:05San Francisco
9h 20m
2 stops
BOS19:25Boston Logan Intl
£208
Find similar
Southwest
8 Dec
BOS07:20Boston Logan Intl
9h 35m
1 stop
SFO13:55San Francisco
10 Dec
SFO10:50San Francisco
7h 50m
1 stop
BOS21:40Boston Logan Intl
£219
Find similar
Southwest
7 Jan
BOS06:50Boston Logan Intl
10h 30m
2 stops
SFO14:20San Francisco
14 Jan
SFO21:30San Francisco
8h 20m
1 stop
BOS08:50Boston Logan Intl
£221
Find similar

United Airlines flights from Boston to San Francisco

Our best United Airlines deals on Boston to San Francisco flight tickets
United Airlines
8 Dec
BOS08:00Boston Logan Intl
6h 52m
SFO11:52San Francisco
6 Jan
SFO00:43San Francisco
8h 36m
1 stop
BOS12:19Boston Logan Intl
£196
Find similar
United Airlines
11 Dec
BOS06:00Boston Logan Intl
6h 45m
SFO09:45San Francisco
6 Jan
SFO21:30San Francisco
8h 44m
1 stop
BOS09:14Boston Logan Intl
£200
Find similar
United Airlines
8 Dec
BOS08:00Boston Logan Intl
6h 52m
SFO11:52San Francisco
12 Dec
SFO08:25San Francisco
5h 41m
BOS17:06Boston Logan Intl
£204
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 25 November 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

Tue 20/1

19:09-22:59

Nonstop6h 50m

San Francisco

Tue 27/1

12:20-20:58

Nonstop5h 38m

£173

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Mon 15/12

20:05-23:59

Nonstop6h 54m

San Francisco

Wed 28/1

07:10-15:51

Nonstop5h 41m

£177

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 17/1

17:40-21:42

Nonstop7h 02m

San Francisco

Sat 24/1

07:10-15:51

Nonstop5h 41m

£181

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 17/1

19:45-23:38

Nonstop6h 53m

San Francisco

Sat 24/1

20:29-05:00

Nonstop5h 31m

£182

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 30/1

07:50-11:50

Nonstop7h 00m

San Francisco

Wed 4/2

13:00-21:37

Nonstop5h 37m

£185

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 16/12

06:45-10:33

Nonstop6h 48m

San Francisco

Thu 25/12

15:22-23:55

Nonstop5h 33m

£186

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 14/1

16:20-22:47

1 stop9h 27m

San Francisco

Tue 20/1

17:02-17:39

1 stop21h 37m

£188

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sun 14/12

18:52-22:48

Nonstop6h 56m

San Francisco

Tue 6/1

12:56-00:23

1 stop8h 27m

£189

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 7/1

09:45-17:24

1 stop10h 39m

San Francisco

Tue 13/1

00:17-11:31

1 stop8h 14m

£189

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 11/2

07:00-10:59

Nonstop6h 59m

San Francisco

Mon 23/2

20:41-05:12

Nonstop5h 31m

£191

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 £253. If you are unable to visit San Francisco during the month of January, then departing from Boston during the month February is also very affordable. Most momondo users find prices during this month for around £253.

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 £219. 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 £1,687. 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 £349. Try not to purchase tickets at midday because they tend to be around £733. 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 £279 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 November 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

£235

Fastest flight time

6h 45m

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 £235. The best return flight deal from Boston to San Francisco found on momondo in the last 72 hours is £429.
The fastest flight from Boston to San Francisco takes 6h 45m
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 45m 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 £150Free CancellationRating
7.2
2,903 reviews
Search JetBlue flights

  • JetBlue Flights From Boston to San Francisco

    JetBlue flight deals from Boston to San Francisco start from £150 round-trip. Over the 8 JetBlue flights for this route in a normal week, average airfare is usually £346 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
Big Sur
Rohnert Park
Sunnyvale
San Ramon
South San Francisco
Capitola
Campbell
Palo Alto
Sausalito
San Bruno
Woodland
Santa Cruz
Redwood City
Burlingame
Modesto
Aptos
Fremont

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
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 25/12
Thu 1/1
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States