BOS - SFO

C$ 175 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 8/6. 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, 0 bags

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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Everything you should know

Cheapest round-trip
C$ 322
Overall average: C$ 547
Alaska Airlines
Sun 19/4Mon 27/4
BOS - SFO • 1 stop
Cheapest direct flights
C$ 342
Typical prices: C$ 376-C$ 619
JetBlue
Fri 8/5Fri 8/5
BOS - SFO • Direct
Advice from real travellers
AI-powered summary based on content written by travel experts and KAYAK users. AI can make mistakes.
JetBlue offers free Wi-Fi and live TV on this route.
Save your boarding pass to your iPhone wallet for ease.
Expert advice
Expert advice
+1
+1
Expert advice
Expert advice
+1
Top airlines
Cheapest • from C$ 322 (round-trip)
Best reviews • 7.2 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
You can fly direct with Delta, JetBlue, and United Airlines. Average duration is 6h 52m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Avoid delays
Most punctual • 86% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 4 weeks in advance save around 42% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 10% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
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Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to San Francisco!
Flight Deals
Booking Insights
Expert advice
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 round-trip 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 round-trip flight deals from Boston to San Francisco

Sun, 19 Apr - Mon, 27 Apr
Alaska Airlines Logo
7:15 a.m. - 4:40 p.m.
BOS
-
SFO
12h 25m
1 stop
Alaska Airlines Logo
5:31 p.m. - 7:12 a.m.
SFO
-
BOS
10h 41m
1 stop
C$ 322Alaska Airlines
Thu, 28 May - Mon, 1 Jun
Alaska Airlines Logo
6:00 a.m. - 12:41 p.m.
BOS
-
SFO
9h 41m
1 stop
Alaska Airlines Logo
6:16 a.m. - 5:44 a.m.
SFO
-
BOS
20h 28m
1 stop
C$ 335Alaska Airlines
Fri, 8 May - Fri, 8 May
JetBlue Logo
9:25 a.m. - 1:00 p.m.
BOS
-
SFO
6h 35mdirect
JetBlue Logo
3:10 p.m. - 11:58 p.m.
SFO
-
BOS
5h 48mdirect
C$ 342JetBlue
Fri, 22 May - Sat, 30 May
JetBlue Logo
9:25 p.m. - 1:06 a.m.
BOS
-
SFO
6h 41mdirect
JetBlue Logo
6:00 a.m. - 2:39 p.m.
SFO
-
BOS
5h 39mdirect
C$ 344JetBlue
Fri, 22 May - Sat, 30 May
JetBlue Logo
7:07 p.m. - 10:49 p.m.
BOS
-
SFO
6h 42mdirect
JetBlue Logo
6:00 a.m. - 2:39 p.m.
SFO
-
BOS
5h 39mdirect
C$ 345JetBlue
Sat, 23 May - Sat, 30 May
Delta Logo
5:45 p.m. - 9:24 p.m.
BOS
-
SFO
6h 39mdirect
Delta Logo
7:05 a.m. - 4:01 p.m.
SFO
-
BOS
5h 56mdirect
C$ 349Delta
Thu, 4 Jun - Tue, 7 Jul
Delta Logo
8:59 p.m. - 12:32 a.m.
BOS
-
SFO
6h 33mdirect
Delta Logo
2:50 p.m. - 11:41 p.m.
SFO
-
BOS
5h 51mdirect
C$ 356Delta
Tue, 14 Jul - Wed, 12 Aug
Delta Logo
8:55 p.m. - 12:56 a.m.
BOS
-
SFO
7h 01mdirect
Delta Logo
12:20 p.m. - 9:11 p.m.
SFO
-
BOS
5h 51mdirect
C$ 363Delta
Thu, 28 May - Wed, 15 Jul
Delta Logo
8:59 p.m. - 12:32 a.m.
BOS
-
SFO
6h 33mdirect
Delta Logo
2:50 p.m. - 11:41 p.m.
SFO
-
BOS
5h 51mdirect
C$ 369Delta
Wed, 8 Apr - Wed, 15 Apr
United Airlines Logo
5:30 a.m. - 9:11 a.m.
BOS
-
SFO
6h 41mdirect
United Airlines Logo
12:35 p.m. - 11:59 p.m.
SFO
-
BOS
8h 24m
1 stop
C$ 371United Airlines
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 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 C$ 458 (return) on average. On the other hand, the most expensive months are December and April, where the average cost of round-trip tickets is C$ 592 and C$ 547 respectively.

Can I save money by flying with a layover from Boston to San Francisco?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of C$ 343, prices are generally cheapest when you fly direct.

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 42% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Expert advice

Expert advice for your flight from Boston to San Francisco

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Delta and United Airlines

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Harriet Baskas

Harriet Baskas

Expert on JetBlue

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Blane Bachelor

Blane Bachelor

Expert on BOS and SFO

Blane Bachelor is a journalist and editor specializing 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 favorite 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. She will always choose the window seat.

Good to know

Low seasonJanuary
Cheapest flightC$ 175
Best time to beat the crowds (11% less expensive on average)
Most popular time to fly (7% 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 round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips 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 Delta
BOS
-
SFO
Mar 2025
Book a flight early in the morning. The plane & crew will have arrived the previous night
PaulaFlew with Alaska Airlines
BOS
-
SFO
Jul 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 C$ 175 for a one-way ticket and C$ 322 for a round-trip.

  • Which airports will I be using when flying from Boston to San Francisco?

    On your way to San Francisco, you’ll fly out from Boston Logan Intl. You’ll be landing at San Francisco.

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

    JetBlue, Alaska Airlines, Hawaiian Airlines, Delta, and American 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.

  • 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 round-trip 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

  • 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

Delta,JetBlue,United Airlines

Delta,JetBlue, +1 more

Tuesday

Delta,JetBlue,United Airlines

Delta,JetBlue, +1 more

Wednesday

Delta,JetBlue,United Airlines

Delta,JetBlue, +1 more

Thursday

Delta,JetBlue,United Airlines

Delta,JetBlue, +1 more

Friday

Delta,JetBlue,United Airlines

Delta,JetBlue, +1 more

Saturday

Delta,JetBlue,United Airlines

Delta,JetBlue, +1 more

Sunday

Delta,JetBlue,United Airlines

Delta,JetBlue, +1 more

See more nonstop flights

Direct returns

San Francisco to Boston Logan Intl

Monday

Delta,JetBlue,United Airlines

Delta,JetBlue, +1 more

Tuesday

Delta,JetBlue,United Airlines

Delta,JetBlue, +1 more

Wednesday

Delta,JetBlue,United Airlines

Delta,JetBlue, +1 more

Thursday

Delta,JetBlue,United Airlines

Delta,JetBlue, +1 more

Friday

Delta,JetBlue,United Airlines

Delta,JetBlue, +1 more

Saturday

Delta,JetBlue,United Airlines

Delta,JetBlue, +1 more

Sunday

Delta,JetBlue,United Airlines

Delta,JetBlue, +1 more

See more nonstop 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 2900 reviews
6.6Food
7.5Comfort
8.0Crew
7.4Boarding
7.2Entertainment
Airline reviews

They made me check my bag and I didn't need to as there was overhead space available. I paid for a seat towards the front of the plane and it didn't recline. I requested a refund and they declined to give me one.

2.0 MediocreRobert, Mar 2026
PBI - HPN
Read more JetBlue reviews

They made me check my bag and I didn't need to as there was overhead space available. I paid for a seat towards the front of the plane and it didn't recline. I requested a refund and they declined to give me one.

I have to congratulate Kayak (and Dylan the Chatdeal agent) because because when we decided extended our trip in Florida by two days, there were many direct flights oprions back to Boston available on the Friday we wanted to fly on the JetBlue website, but once I canceled the original JetBlue flight on their website, those direct return options disappeared immediatley! I think it's a game JetBlue plays. . Luckily, I checked Kayak and they had a direct flight that wasn't appearing on JetBlue's website and so I booked it, and we were able to fly home direct through the Kayak booking when JetBlue was offering nothing (even though I have been a True Blue member for 20 years, and also am a Mosaic member). So much for loyalty- their algorithm for booking is like a shell game. JetBlue used to be a good company but now they're worse than anyone. Also I was originally booked this trip to Florida, two months before the departure date, I booked the trip on JetBlue's website and then after the payment part, they said there was a problem and that I needed to do the booking again, so when I immediately went to rebook , the price had gone up 30%! I called them and it sounded like they had heard this so many times before and the guy told me to check back in 10 minutes and the price would be back to where it was when I was booking- it but it never was. How could the price go up 30% in one minute two months before the flight???? They're playing a game with their customers. Anyways, I booked a cheaper flight then at a less convenient time. So fast forward two months the night before the 7 AM flight, they sent me an email at midnight when I was sleeping to let me know that my flight at 7 AM had been canceled. The only thing they offered was a flight that night from from a different airport (Providence) to a different airport in Florida (West Palm Beach) or a flight two days later. No compensation, nothing. They couldn't of tried to get another plane to the Boston airport? They had all night to do it. I passed on their ridiculous options and flew with Delta and it was a great experience. Of course, I had to pay a lot more booking on the same day, but JetBlue doesn't care. I put in a lengthy complaint with the agent who assured me someone would get back to me by email within three days and I haven't heard a thing. JetBlue used to be a good company but now they're among the worst. The only thing they still have is decent legroom, but the corporate bean counters will probably start taking that away too.

We were made to wait in the airport for six hours for a flight that was ultimately canceled.

Both flights were significantly delayed. The flight experience itself was great.

My flight got delayed and eventually canceled, then rescheduled. I and several others had a connection from Boston to Paris and asked several times if we would make it. They assured us we would and then rebooked us mid flight without our consent and closed doors early even though they said they communicated we were a bit delayed. We got stranded in Boston and I opted with being rebooked for a different connection to France since they refused to pay for a Hotel. I've now been in Europe for 5 days and still haven't recieved my bags. There was absolutely no urgency for the fact that I'm in a foreign country with absolutely no change of clothes or any of my medication. Such an overwhelming and frustrating experience.

Automated scanning was slow and somewhat haphazard. Too many people were unfamiliar with the tech and were forced to learn on the fly. The hands off approach of the gate staff made it more uncomfortable. This needs work. Overall the flight and cabin crew were excellent.

The crew for the flight was A+ top notch. They were friendly and professional and made the flight a very relaxing and enjoable.

Rude crew member. She seemed annoyed at me without me saying a single word. Also loudly admonished me for having my bag next to my seat instead of tucked away before landing. Just telling me to put it away and guiding me without giving me a lecture would have been enough.

No included food for a 5 hour flight and the entertainment was only accessible if you had wired headphones (not provided). Otherwise though, great and smooth flying and customer service.

Crew were fantastic and so catering and wonderful! Full score for the entire crew!

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

Information on your arrival and departure airports