BOS - SFO

C$ 201 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 28/4. 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$ 383
Typical prices: C$ 707-C$ 414
Frontier, Alaska Airlines
Thu 4/6Tue 9/6
BOS - SFO • 1 stop
Cheapest direct flights
C$ 386
Typical prices: C$ 738-C$ 434
Delta
Sat 25/4Sat 2/5
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$ 386 (round-trip)
Best reviews • 7.2 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Direct flights
You can fly direct with Delta, JetBlue, and United Airlines. Average duration is 6h 42m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Avoid delays
Most punctual • 87% 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 41% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 12% price drop
Most popular
Good to know
Good to know
+1
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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

Thu, 4 Jun - Tue, 9 Jun
Multiple Airlines Logo
6:00 a.m. - 7:34 p.m.
BOS
-
SFO
16h 34m
1 stop
Multiple Airlines Logo
4:44 p.m. - 5:44 a.m.
SFO
-
BOS
10h 00m
1 stop
C$ 383Multiple Airlines
Sat, 25 Apr - Sat, 2 May
Delta Logo
7:40 a.m. - 11:29 a.m.
BOS
-
SFO
6h 49mdirect
Delta Logo
7:05 a.m. - 3:39 p.m.
SFO
-
BOS
5h 34mdirect
C$ 386Delta
Sat, 25 Apr - Sat, 2 May
JetBlue Logo
8:19 p.m. - 11:59 p.m.
BOS
-
SFO
6h 40mdirect
JetBlue Logo
8:25 p.m. - 5:07 a.m.
SFO
-
BOS
5h 42mdirect
C$ 388JetBlue
Sat, 25 Apr - Sat, 2 May
Delta Logo
9:20 p.m. - 12:59 a.m.
BOS
-
SFO
6h 39mdirect
Delta Logo
1:00 p.m. - 9:41 p.m.
SFO
-
BOS
5h 41mdirect
C$ 390Delta
Tue, 28 Apr - Tue, 5 May
United Airlines Logo
3:28 p.m. - 9:24 p.m.
BOS
-
SFO
8h 56m
1 stop
United Airlines Logo
8:17 a.m. - 5:14 p.m.
SFO
-
BOS
5h 57mdirect
C$ 395United Airlines
Tue, 18 Aug - Sun, 23 Aug
Delta Logo
10:00 a.m. - 1:57 p.m.
BOS
-
SFO
6h 57mdirect
Delta Logo
10:00 p.m. - 6:54 a.m.
SFO
-
BOS
5h 54mdirect
C$ 400Delta
Sat, 23 May - Tue, 11 Aug
Alaska Airlines Logo
6:00 a.m. - 12:41 p.m.
BOS
-
SFO
9h 41m
1 stop
Alaska Airlines Logo
6:00 a.m. - 5:40 a.m.
SFO
-
BOS
20h 40m
1 stop
C$ 407Alaska Airlines
Fri, 14 Aug - Mon, 24 Aug
Delta Logo
8:55 p.m. - 12:56 a.m.
BOS
-
SFO
7h 01mdirect
Delta Logo
10:00 p.m. - 6:54 a.m.
SFO
-
BOS
5h 54mdirect
C$ 414Delta
Tue, 28 Apr - Wed, 6 May
Delta Logo
6:10 a.m. - 5:21 p.m.
BOS
-
SFO
14h 11m
1 stop
Delta Logo
10:30 p.m. - 7:25 a.m.
SFO
-
BOS
5h 55mdirect
C$ 418Delta
Tue, 28 Apr - Tue, 5 May
United Airlines Logo
11:10 a.m. - 2:54 p.m.
BOS
-
SFO
6h 44mdirect
United Airlines Logo
10:17 a.m. - 7:07 p.m.
SFO
-
BOS
5h 50mdirect
C$ 420United 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.

How much is a round-trip flight from Boston to San Francisco?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Boston to San Francisco departing in June.

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$ 471 (return) on average. On the other hand, the most expensive months are April and December, where the average cost of round-trip tickets is C$ 647 and C$ 609 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$ 352, 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 41% 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$ 201
Best time to beat the crowds (12% less expensive on average)
Most popular time to fly and prices are also 3% lower 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$ 201 for a one-way ticket and C$ 383 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, 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 A318/A319/A320/A321 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 2917 reviews
7.3Boarding
7.5Comfort
7.9Crew
7.2Entertainment
6.6Food
Airline reviews

They forced me to check my hand luggage at the gate.

2.0 MediocreAnonymous, Apr 2026
DCA - BOS
Read more JetBlue reviews

They forced me to check my hand luggage at the gate.

I specifically choose not to check bags to ensure I can proceed directly to ground transportation upon arrival. However, due to a recurring lack of cabin space, I was again forced to gate-check my rolling luggage after going through my luggage to take out electronics and batteries. This practice unilaterally changes the service agreement made at the time of purchase. JetBlue needs to find a better way to manage overhead space that honors the carry-on baggage allowance.

Still hasn’t left. Why are you asking how it was?

Flight was good wish there were more snacks options for such a long flight but stewardesses were very pleasant as was flight crew.

I was denied a plastic fork to eat my food and was told plastic forks are for paying customers who buy Jet Blue’s food. So I had to make a utensil out of a cup so nourish my body. Like a refugee. Because decency is dead.

I was especially impressed without efficiently the crew got passengers on and off. One of the stewards was slightly gruff, I thought. No big deal but that's what I noticed.

Absolutely horrible. Flight was delayed 4 hours and they had no clue what was going on.

Onboard functioning wide-variety entertainment on a budget and having an open pantry is nice. Seats are not comfortable but go provide plenty of legroom for a 6'2" 260lbs man.

Even though the weather made a lot of flights become cancelled Jet Blue made the flight that was supposed to leave at 9 pm and we left at 12:15 am and I was so grateful- Thanks to the Senior Jet Blue Staff who made those decisions

Worst customer service ever experienced on the planet, dirty plane, no communication, and severe delays

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

Information on your arrival and departure airports