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Cheap flights from Boston to San Francisco from £57

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 27/8. 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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Cheap return flights

Southwest Logo
05:35 - 11:50BOS-SFO
9h 15m1 stop
Southwest Logo
21:05 - 08:10SFO-BOS
8h 05m1 stop
£113Southwest
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Sat, 30 Aug - Sat, 6 Sep
Southwest Logo
05:35 - 11:50BOS-SFO
9h 15m1 stop
Southwest Logo
06:50 - 21:00SFO-BOS
11h 10m2 stops
£117Southwest
Find Deal
Sat, 30 Aug - Sat, 6 Sep
Southwest Logo
06:15 - 16:25BOS-SFO
13h 10m1 stop
Southwest Logo
06:50 - 21:00SFO-BOS
11h 10m2 stops
£121Southwest
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Sat, 30 Aug - Sat, 6 Sep
Southwest Logo
15:00 - 20:10BOS-SFO
8h 10m1 stop
Southwest Logo
21:05 - 08:10SFO-BOS
8h 05m1 stop
£121Southwest
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Thu, 4 Sep - Mon, 8 Sep
Southwest Logo
14:50 - 22:25BOS-SFO
10h 35m2 stops
Southwest Logo
21:05 - 08:10SFO-BOS
8h 05m1 stop
£124Southwest
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Wed, 27 Aug - Tue, 2 Sep
Southwest Logo
17:10 - 23:10BOS-SFO
9h 00m1 stop
Southwest Logo
21:05 - 08:10SFO-BOS
8h 05m1 stop
£125Southwest
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Thu, 21 Aug - Tue, 2 Sep
Southwest Logo
05:40 - 13:25BOS-SFO
10h 45m1 stop
Southwest Logo
21:05 - 08:15SFO-BOS
8h 10m1 stop
£126Southwest
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Tue, 30 Sep - Wed, 1 Oct
Southwest Logo
06:40 - 16:25BOS-SFO
12h 45m1 stop
Southwest Logo
21:05 - 10:30SFO-BOS
10h 25m1 stop
£129Southwest
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Thu, 21 Aug - Mon, 25 Aug
Alaska Airlines Logo
20:23 - 23:52BOS-SFO
6h 29mdirect
Alaska Airlines Logo
06:10 - 15:00SFO-BOS
5h 50mdirect
£174Alaska Airlines
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Sat, 30 Aug - Sat, 6 Sep
JetBlue Logo
19:55 - 23:38BOS-SFO
6h 43mdirect
JetBlue Logo
22:00 - 06:39SFO-BOS
5h 39mdirect
£175JetBlue
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Sat, 30 Aug - Sat, 6 Sep

Southwest flights from Boston to San Francisco

Our best Southwest deals on Boston to San Francisco flight tickets
Southwest
30 Aug
BOS05:35Boston Logan Intl
9h 15m
1 stop
SFO11:50San Francisco
6 Sept
SFO21:05San Francisco
8h 05m
1 stop
BOS08:10Boston Logan Intl
£113
Find similar
Southwest
30 Aug
BOS05:35Boston Logan Intl
9h 15m
1 stop
SFO11:50San Francisco
6 Sept
SFO06:50San Francisco
11h 10m
2 stops
BOS21:00Boston Logan Intl
£117
Find similar
Southwest
30 Aug
BOS06:15Boston Logan Intl
13h 10m
1 stop
SFO16:25San Francisco
6 Sept
SFO06:50San Francisco
11h 10m
2 stops
BOS21:00Boston Logan Intl
£121
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Hawaiian Airlines flights from Boston to San Francisco

Our best Hawaiian Airlines deals on Boston to San Francisco flight tickets
Hawaiian Airlines
23 Jul
BOS20:19Boston Logan Intl
6h 40m
SFO23:59San Francisco
6 Aug
SFO21:28San Francisco
5h 42m
BOS06:10Boston Logan Intl
£197
Find similar
Hawaiian Airlines
23 Jul
BOS20:19Boston Logan Intl
6h 40m
SFO23:59San Francisco
29 Jul
SFO21:28San Francisco
5h 42m
BOS06:10Boston Logan Intl
£204
Find similar

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 September is, on average, the cheapest month to fly to San Francisco from Boston, with most prices found around £229. If you are unable to visit San Francisco during the month of September, then departing from Boston during the month January is also very affordable. Most momondo users find prices during this month for around £244.

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 £1,080. 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 £205. 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 £262 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 £240 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 July 2025, prices for Boston to San Francisco flights are approximately 25% cheaper 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

£57

Fastest flight time

6h 28m

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 £57. The best return flight deal from Boston to San Francisco found on momondo in the last 72 hours is £113.
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)
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  • 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 29m 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 £106Free CancellationRating
7.3
2,914 reviews
Search JetBlue flights
Alaska AirlinesPriceFrom £163Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From Boston to San Francisco

    Alaska Airlines flight deals from Boston to San Francisco start from £221 round-trip. Over the 12 Alaska Airlines flights for this route in a normal week, average airfare is usually £278 round-trip - but some users have found much cheaper deals with momondo.

  • JetBlue Flights From Boston to San Francisco

    Across 2,913 JetBlue reviews on momondo, the average score is 7.3/10. JetBlue flies from Boston to San Francisco about 27 times each week, with ticket deals ranging from £144 to £259. Price data is based on momondo searches in the last 72 hours.

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
Seaside
Santa Clara
Newark
Vacaville
Salinas
Vallejo
Calistoga
Rohnert Park
Campbell
Santa Cruz
Bodega Bay
Milpitas
San Ramon
South San Francisco
Capitola
Brentwood
San Bruno
Sausalito
Sonoma

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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