BOS - SFO

£98 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 16/12. 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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Flight 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

Thu, 4 Dec - Wed, 10 Dec
Alaska Airlines Logo
18:52 - 22:48BOS-SFO
6h 56mdirect
Alaska Airlines Logo
07:00 - 17:52SFO-BOS
7h 52m1 stop
£201Alaska Airlines
Find Deal
Tue, 28 Oct - Wed, 29 Oct
Southwest Logo
07:50 - 13:30BOS-SFO
8h 40m1 stop
Southwest Logo
09:00 - 22:15SFO-BOS
10h 15m1 stop
£203Southwest
Find Deal
Fri, 17 Oct - Tue, 21 Oct
Alaska Airlines Logo
20:25 - 00:05BOS-SFO
6h 40mdirect
Alaska Airlines Logo
07:11 - 16:00SFO-BOS
5h 49mdirect
£204Alaska Airlines
Find Deal
Wed, 10 Dec - Fri, 12 Dec
Hawaiian Airlines Logo
16:24 - 23:48BOS-SFO
10h 24m1 stop
Hawaiian Airlines Logo
07:00 - 15:37SFO-BOS
5h 37mdirect
£206Hawaiian Airlines
Find Deal
Fri, 17 Oct - Sat, 25 Oct
Delta Logo
19:55 - 23:41BOS-SFO
6h 46mdirect
Delta Logo
07:00 - 15:42SFO-BOS
5h 42mdirect
£207Delta
Find Deal
Wed, 10 Dec - Mon, 15 Dec
Alaska Airlines Logo
16:24 - 23:48BOS-SFO
10h 24m1 stop
Alaska Airlines Logo
19:47 - 17:52SFO-BOS
19h 05m1 stop
£207Alaska Airlines
Find Deal
Wed, 5 Nov - Mon, 10 Nov
Southwest Logo
07:20 - 13:55BOS-SFO
9h 35m1 stop
Southwest Logo
05:30 - 18:40SFO-BOS
10h 10m1 stop
£211Southwest
Find Deal
Sat, 18 Oct - Wed, 22 Oct
Delta Logo
07:15 - 11:02BOS-SFO
6h 47mdirect
Delta Logo
07:00 - 15:42SFO-BOS
5h 42mdirect
£215Delta
Find Deal
Fri, 24 Oct - Fri, 31 Oct
JetBlue Logo
06:15 - 09:50BOS-SFO
6h 35mdirect
JetBlue Logo
08:00 - 23:11SFO-BOS
12h 11m1 stop
£218JetBlue
Find Deal
Fri, 17 Oct - Sat, 25 Oct
JetBlue Logo
20:15 - 00:15BOS-SFO
7h 00mdirect
JetBlue Logo
06:00 - 21:00SFO-BOS
12h 00m1 stop
£223JetBlue
Find Deal

Everything you should know

Our travellers' advice
AI-generated summary based on content written by travel experts and KAYAK users
Use the FlyLogan app for gate info at Boston Logan.
Save your boarding pass to your phone for convenience.
Expert advice
Expert advice
+1
+1
Expert advice
Expert advice
+1
Top airlines
Alaska Airlines
Cheapest • from £201 (return)
JetBlue
Best reviews • 7.2 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travellers who book at least 4 weeks in advance save around 41% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 8% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest return fare
£201
Overall average: £299
Alaska Airlines
Thu 4/12Wed 10/12
BOS - SFO • Direct
Cheapest direct flights
£204
Typical prices: £191-362
Alaska Airlines
Fri 17/10Sat 25/10
BOS - SFO • Direct
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to San Francisco!
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.
Airports
BOS

Download the FlyLogan app for gate info, flight status, and order ahead options at BOS restaurants.

Read more about BOSby Blane Bachelor
Our travel experts
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
Booking Insights

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, Wednesday is the cheapest day to fly on average and Saturday is the most expensive. Flying from San Francisco back to Boston, the best deals are generally found on Friday, with Tuesday 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 January, where tickets cost £243 (return) on average. On the other hand, the most expensive months are December and August, where the average cost of round-trip tickets is £299 and £285 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 4 weeks before departure, which saves you about 41% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.

Good to know - Cheap tickets from Boston to San Francisco

Low seasonJanuary
Cheapest flight£98
Best time to beat the crowds (9% less expensive on average)
Most popular time to fly (13% 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 £134 for a one-way ticket and £274 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 Airbus A321neo 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.

  • 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 San Francisco to Boston? 25% of our users found flights on this route for £124 or less one-way.
  • 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?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Boston Logan Intl 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

Alaska Airlines, Delta, JetBlue, +1 more

Alaska Airlines, Delta, +2 more

Tuesday

Alaska Airlines, Delta, JetBlue, +1 more

Alaska Airlines, Delta, +2 more

Wednesday

Alaska Airlines, Delta, JetBlue, +1 more

Alaska Airlines, Delta, +2 more

Thursday

Alaska Airlines, Delta, JetBlue, +1 more

Alaska Airlines, Delta, +2 more

Friday

Alaska Airlines, Delta, JetBlue, +1 more

Alaska Airlines, Delta, +2 more

Saturday

Alaska Airlines, Delta, JetBlue, +1 more

Alaska Airlines, Delta, +2 more

Sunday

Alaska Airlines, Delta, JetBlue, +1 more

Alaska Airlines, Delta, +2 more

See more direct flights

Direct returns

San Francisco to Boston Logan Intl

Monday

Alaska Airlines, Delta, JetBlue, +1 more

Alaska Airlines, Delta, +2 more

Tuesday

Alaska Airlines, Delta, JetBlue, +1 more

Alaska Airlines, Delta, +2 more

Wednesday

Alaska Airlines, Delta, JetBlue, +1 more

Alaska Airlines, Delta, +2 more

Thursday

Alaska Airlines, Delta, JetBlue, +1 more

Alaska Airlines, Delta, +2 more

Friday

Alaska Airlines, Delta, JetBlue, +1 more

Alaska Airlines, Delta, +2 more

Saturday

Alaska Airlines, Delta, JetBlue, +1 more

Alaska Airlines, Delta, +2 more

Sunday

Alaska Airlines, Delta, JetBlue, +1 more

Alaska Airlines, Delta, +2 more

See more direct flights

Reviews of the top airline 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.
7.2
JetBlueOverall score based on 2914 reviews
7.6Comfort
8.0Crew
6.7Food
7.2Entertainment
7.4Boarding
Airline reviews

They have the most inexperienced / rude flight staff I’ve encountered

4.0 OkayTamara, Sept 2025PHX - JFK
Read more JetBlue reviews

They have the most inexperienced / rude flight staff I’ve encountered

very difficult boarding process - aggressive passengers not the friendliest crew

WiFi was not eorkig (again) And the plane was from 1990 with the screens which were.not touch and most didn’t even work and if lucky could tune in tv

I paid extra for a seat closer to the front. The TV didn’t work at all for the entire flight. Would have been nice to know before I purchased an “upgraded “ seat

It was great. I had never flown on JetBlue before, but would be very happy to fly with them in the future.

Worst flight experience ever flights canceled. JetBlue told us just did not even bother standing in line to come back in one and a half hours then without any information we had to go pick up all of our luggage and spend over $2000 in accommodation just to get home. JetBlue said that the next flight available for us to get home would be three days later. Absolutely absurd hasn’t offered to give us any compensation do not fly JetBlue horrible company. They said it was based on the weather and the weather is great in all locations that we would’ve been flying to total hoax. I think it’s a conspiracy theory.

The captain gave good announcements and the flight attendants were friendly. The WiFi was pretty good. The plane itself looked very old inside and the seats were very uncomfortable. The screens in the seat backs were the smallest I’ve ever seen. There were so many loud and obnoxious kids on this flight and the parents didn’t do much to try to quiet them down. Some had videos and games on tablets with higher than necessary volume going the whole time.

Too many long delays with JetBlue. Worst major airline that serves JFK but unfortunately I keep going back because of the prices.

My JetBlue experience was nice. The flights ran on time, the aircraft was clean and comfortable, and the flight attendants were attentive. My only issue, which is isolated to the low-cost (budget) option at JetBlue, is that the check in process makes the user feel that they have to buy their seats. The seats offered for purchase are upgrades from the budget seats you get (which are essentially the last seats remaining). The interface should not make it feel like you must purchase a seat.

The plane was late to leave.. Internet was lousy. TV was not working. when we arrived, We stayed on the plane for a long time before we got to the gate. It took us a long time to retrieve our luggage because they didn’t know what carousel to send them to. It was a bad experience.

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

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