BOS - SFO

£88 Find Cheap Flights from Boston to San Francisco

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to San Francisco departing on 10/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to San Francisco

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to San Francisco, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to San Francisco, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Boston to San Francisco (BOS-SFO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Boston to San Francisco that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Boston to San Francisco

Mi, 24 Sep - Mi, 15 Okt
Delta Logo
20:00 - 23:58BOS-SFO
6h 58mdirect
Delta Logo
21:55 - 06:45SFO-BOS
5h 50mdirect
£174Delta
Find Deal
Di, 26 Aug - Mi, 3 Sep
Alaska Airlines Logo
20:23 - 23:52BOS-SFO
6h 29mdirect
Alaska Airlines Logo
11:30 - 00:23SFO-BOS
9h 53m1 stop
£182Alaska Airlines
Find Deal
Do, 25 Sep - Di, 30 Sep
Alaska Airlines Logo
20:23 - 23:52BOS-SFO
6h 29mdirect
Alaska Airlines Logo
06:10 - 15:00SFO-BOS
5h 50mdirect
£183Alaska Airlines
Find Deal
Di, 15 Jul - Di, 15 Jul
United Airlines Logo
06:00 - 09:28BOS-SFO
6h 28mdirect
United Airlines Logo
18:50 - 07:33SFO-BOS
9h 43m1 stop
£195United Airlines
Find Deal
Sa, 1 Nov - Di, 4 Nov
JetBlue Logo
20:45 - 00:34BOS-SFO
6h 49mdirect
JetBlue Logo
08:15 - 21:32SFO-BOS
10h 17m1 stop
£196JetBlue
Find Deal
Di, 16 Sep - Fr, 26 Sep
Southwest Logo
14:50 - 22:25BOS-SFO
10h 35m2 stops
Southwest Logo
11:25 - 23:00SFO-BOS
8h 35m1 stop
£201Southwest
Find Deal
Do, 14 Aug - So, 17 Aug
Southwest Logo
15:00 - 20:10BOS-SFO
8h 10m1 stop
Southwest Logo
21:05 - 08:10SFO-BOS
8h 05m1 stop
£205Southwest
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Mi, 6 Aug - Fr, 5 Sep
JetBlue Logo
16:05 - 23:36BOS-SFO
10h 31m1 stop
JetBlue Logo
14:12 - 22:59SFO-BOS
5h 47mdirect
£208JetBlue
Find Deal
Fr, 18 Jul - So, 20 Jul
United Airlines Logo
08:05 - 11:36BOS-SFO
6h 31mdirect
United Airlines Logo
22:55 - 09:26SFO-BOS
7h 31m1 stop
£222United Airlines
Find Deal
Fr, 1 Aug - So, 3 Aug
Hawaiian Airlines Logo
17:45 - 23:50BOS-SFO
9h 05m1 stop
Hawaiian Airlines Logo
21:28 - 06:10SFO-BOS
5h 42mdirect
£288Hawaiian Airlines
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Expert advice

Expert advice for your flight from Boston to San Francisco

 
Snippets provided in this section are AI-generated based on a summarisation of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
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BOS

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Read more about BOSby Blane Bachelor
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Blane Bachelor

Blane Bachelor

Expert on BOS

Blane Bachelor

Blane Bachelor

Blane Bachelor is a journalist and editor specialising in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favourite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history.

Read more
Useful Info

KAYAK's insights & trends for Boston to San Francisco flights

Get data-powered insights and trends into flights from Boston to San Francisco to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Boston to San Francisco?

The average price of all round-trip flights from Boston to San Francisco clicked on KAYAK for each day over the last 12 months.

For Boston to San Francisco, Friday is the cheapest day to fly on average and Monday is the most expensive. Flying from San Francisco back to Boston, the best deals are generally found on Thursday, with Monday being the most expensive.

What is the cheapest month to fly from Boston to San Francisco?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston to San Francisco, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Boston to San Francisco is September, where tickets cost £229 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is £302 and £286 respectively.

How far in advance should I book a flight from Boston to San Francisco?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Boston to San Francisco, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Boston to San Francisco, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.


Good to know - Cheap tickets from Boston to San Francisco

Low seasonJanuary
High seasonDecember
Cheapest flight£88
Best time to beat the crowds (7% less expensive on average)
Most popular time to fly (15% more expensive on average)
Flight from Boston to San Francisco

When to book flights from Boston to San Francisco

Are your dates flexible? Find out the best times to travel from Boston to San Francisco based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Flights from Boston to San Francisco: the best tips from KAYAK users' own experiences

Insights shared by verified travellers who flew the route from Boston to San Francisco 
GeraldFlew with DeltaBOS-SFOMar 2025
Book a flight early in the morning. The plane & crew will have arrived the previous night
PaulaFlew with Alaska AirlinesBOS-SFOJul 2024
Get your boarding pass online and save it to your wallet App on the iPhone. Makes it so easy

FAQs for booking flights from Boston to San Francisco

  • If my pet travels with me on my trip from Boston to San Francisco where will I be able to pick it up upon arrival?

    At San Francisco Airport, pets that are traveling in the baggage compartment will be delivered at the baggage claim area. If you instead brought your pet using your airline’s cargo service, you must contact your airline directly. Each airline has its own off-site cargo office location where you can retrieve your pet after your flight.

  • If I am being picked up at San Francisco Airport, where is the best place for my ride to meet me?

    The airport offers a free cell phone lot that is located near the long-term parking lot. Drivers are advised to park there until your flight arrives, since there is no parking of any kind at the terminal building. The maximum waiting time allowed in the cell phone lot is sixty minutes.

  • Is there a post office at San Francisco Airport?

    There is a full United States Postal Branch at the airport just north of the airport, and there are mailboxes located outside each of the terminal buildings. If you are simply in need of stamps, there are stamp machines located on the Departures level of all of the terminal buildings.

  • Where can I get an Uber at San Francisco International Airport?

    Upon arrival at San Francisco International, you should collect all of your bags and then request your ride. Once you have requested your ride you may meet Uber Pool and Express Pool rides on level 5 of the domestic garage and all other rides, such as Uber Black and SUV, can be met at the departures level located on the second floor of the domestic terminal.

  • What is the cheapest flight from Boston to San Francisco?

    In the last 3 days, the lowest price for a flight from Boston to San Francisco was £119 for a one-way ticket and £237 for a return.

  • Which airlines offer Wi-Fi service onboard planes from Boston to San Francisco?

    JetBlue, Alaska Airlines, Hawaiian Airlines, American Airlines, and Asiana Airlines offer inflight Wi-Fi service on the Boston to San Francisco flight route.

  • Which aircraft models fly most regularly from Boston to San Francisco?

    The Boeing 737 MAX 9 is the aircraft model that flies most regularly on the Boston to San Francisco flight route.

  • Which airline alliances offer flights from Boston to San Francisco?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Boston and San Francisco, with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from Boston to San Francisco?

    There are direct flights from Boston to San Francisco on a daily basis.

  • Which is the best airline for flights from Boston to San Francisco, Alaska Airlines or JetBlue?

    The two airlines most popular with KAYAK users for flights from Boston to San Francisco are Alaska Airlines and JetBlue. With an average price for the route of £205 and an overall rating of 8.0, Alaska Airlines is the most popular choice. JetBlue is also a great choice for the route, with an average price of £190 and an overall rating of 7.3.

  • How does KAYAK find such low prices on flights from Boston to San Francisco?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boston to San Francisco.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boston to San Francisco?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from Boston is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boston to San Francisco?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to San Francisco with an airline and back to Boston with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boston to San Francisco?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Boston to San Francisco

  • Looking for a cheap flight from Boston to San Francisco? 25% of our users found flights on this route for £164 or less one-way and £300 or less round-trip.
  • After long flights from Boston to San Francisco, you are most likely looking to rest and recuperate. That is where the Best Western Plus Grosvenor Airport Hotel can help. This hotel is located just 1.5 miles from the airport and is the perfect hotel for those traveling for both business and pleasure.
  • If you feel like you need of a bit of a pick-me-up after your long flight from Boston to San Francisco, stop by Freshen Up. This unique airport concept is located in the main hall of San Francisco International Airport near the entrance to gates G91-G102. Freshen Up offers shower facilities, toiletries, ironing facilities, and undergarments, all designed to get you feeling like yourself again after your long flight.
  • If you are craving a cold beer before your flight from Boston to San Francisco, then why not stop by the Boston Beer Works? Located in Terminal C near Gate C-14 at Boston Logan International Airport, this restaurant offers soups and salads as well as a variety of wraps and plates and, of course, a wide selection of craft beers.
  • When looking for something completely unique to commemorate your time in Boston, stop by New England Collections located in Terminal A near Gate A-7 at Boston Logan International Airport. This specialty shop carries a whole host of gifts, clothing, and novelties that highlight the unique New England lifestyle.
  • Sports fans with some time on their hands before flights from Boston to San Francisco should make it a point to stop in at Game On located in Terminal A near Gate A15 in Boston Logan International Airport. This unique concept is part restaurant, part sports bar, and part game room.

Prefer to fly direct from Boston to San Francisco?

Find which airlines fly direct from Boston Logan Intl Airport to San Francisco Airport, which days they fly and book direct flights.

Direct departures

Boston Logan Intl to San Francisco

Monday

ANA, Air New Zealand, Alaska Airlines, +20 more

ANA, Air New Zealand, +21 more

Tuesday

ANA, Air New Zealand, Alaska Airlines, +21 more

ANA, Air New Zealand, +22 more

Wednesday

ANA, Air China, Air New Zealand, +21 more

ANA, Air China, +22 more

Thursday

ANA, Air New Zealand, Alaska Airlines, +21 more

ANA, Air New Zealand, +22 more

Friday

ANA, Air New Zealand, Alaska Airlines, +20 more

ANA, Air New Zealand, +21 more

Saturday

ANA, Air China, Air New Zealand, +21 more

ANA, Air China, +22 more

Sunday

ANA, Air New Zealand, Alaska Airlines, +21 more

ANA, Air New Zealand, +22 more

See more direct flights

Direct returns

San Francisco to Boston Logan Intl

Monday

ANA, Air New Zealand, Alaska Airlines, +22 more

ANA, Air New Zealand, +23 more

Tuesday

ANA, Air New Zealand, Alaska Airlines, +21 more

ANA, Air New Zealand, +22 more

Wednesday

ANA, Air China, Air New Zealand, +21 more

ANA, Air China, +22 more

Thursday

ANA, Air New Zealand, Alaska Airlines, +22 more

ANA, Air New Zealand, +23 more

Friday

ANA, Air New Zealand, Alaska Airlines, +20 more

ANA, Air New Zealand, +21 more

Saturday

ANA, Air China, Air New Zealand, +23 more

ANA, Air China, +24 more

Sunday

ANA, Air New Zealand, Alaska Airlines, +21 more

ANA, Air New Zealand, +22 more

See more direct flights
See more direct flights

Top airlines flying from Boston to San Francisco

 
See real verified KAYAK customer reviews for airlines flying from Boston to San Francisco. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Boston to San Francisco? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 10000 reviews
7.1Food
7.8Comfort
7.1Entertainment
8.1Boarding
8.5Crew
Airline reviews

always delayed. toilet is too stinky worse than smells in sf homeless distriction

2.0 MediocreSunni, Jun 2025LAS - SFO
Read more Alaska Airlines reviews

always delayed. toilet is too stinky worse than smells in sf homeless distriction

It was too cold for the first quarter of the flight.

Check in, they should have told me that upon arrival i needed to exit the secure area and re-check in with Eva Air. I wasn't sure what to do upon arrival at S.F.

Get more efficient check in staff. My boarding pass was printed with different name. My son who was traveling with me had his boarding pass printed in duplicate and we were interrogated like it was our fault that I may have lost my own boarding pass when the staff knew very well she just handled and tore the piece she need. This was with PAL.

Laney was very helpful. I am computer illiterate. She helped me obtain a boarding pass and preferred seat. She was warm, friendly, helpful, and smiled. I was impressed.

Flight was delayed. Crew was not helpful in the plane.

Flight attendant took my carefully folded coat and flung it across the aisle to the bin across the way. Where one of the passengers rescued it for me, because that just wasn’t right!!

the flight was delayed twice and then delayed from taking off.

This was my first trip in years with Alaska. I don’t think I’ll do it again. The planes are old and tired looking. The seats are small with zero legroom. The JFK terminal is one of the worst I’ve been in. On this flight the pilot had to abort the landing and circle the Bay before trying again. I think I’ll stick with the usual suspects …

Changed flight from San Fran to Seattle Then with a Delayed takeoff barely made my connection Waited over an hour for luggage 😜

Communication since no reason or explanation was given for 3 hrs delay

Flight was delayed several 3 hours - no reason was given and no communication what so ever.

No overhead baggage room even though I was seated in row 2. Consequently had to check in my carry on bag. Baggage carousel was jammed. Took 45 min to get my bag.

Excellent from start to finish. All staff members were amazing!

Excellent. Although they used to greet me as a mosaic member and provide a free drink, early boarding helps me to keep coming back to JetBlue.

Cancelled flight with no specific instructions to get a boarding pass for another flight. The whole flight of people were in line for an hour because there was only 1 person to help at the desk. This was unusual for JetBlue.

It was too hot in the cabin. The AC did not help.

Except for the 28 minute delay leaving and the earlier reschedule to a later takeoff time the flight was good.

Loved the leg room and tvs screens on the seats and free WiFi. Wish the price was lower and could save by rebooking

It took 1-1/2 hours to get our luggage after we landed. That to me is unacceptable

Everything you need to know for your flight from Boston to San Francisco

Information on your arrival and departure airports

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