BOS - SFO

$186 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 21/5. 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.
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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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Cheap Flight Deals 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.

Recent return flight deals from Boston to San Francisco

KAYAK's recommended return flight deals from the most popular airlines that fly from Boston to San Francisco.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
Frontier Logo
11:56 - 22:48BOS-SFO
13h 52m1 stop
Frontier Logo
20:48 - 09:56SFO-BOS
10h 08m1 stop
$311Frontier
Find Deal
vie., 6 jun. - dom., 8 jun.
JetBlue Logo
20:35 - 00:17BOS-SFO
6h 42mdirect
JetBlue Logo
20:44 - 05:25SFO-BOS
5h 41mdirect
$369JetBlue
Find Deal
sáb., 24 may. - sáb., 31 may.
Alaska Airlines Logo
06:00 - 12:39BOS-SFO
9h 39m1 stop
Alaska Airlines Logo
20:47 - 05:40SFO-BOS
5h 53mdirect
$386Alaska Airlines
Find Deal
sáb., 24 may. - mié., 28 may.
Alaska Airlines Logo
20:19 - 23:59BOS-SFO
6h 40mdirect
Alaska Airlines Logo
21:28 - 06:10SFO-BOS
5h 42mdirect
$388Alaska Airlines
Find Deal
mar., 17 jun. - dom., 17 ago.
United Airlines Logo
09:30 - 15:10BOS-SFO
8h 40m1 stop
United Airlines Logo
23:20 - 10:23SFO-BOS
8h 03m1 stop
$402United Airlines
Find Deal
sáb., 31 may. - sáb., 31 may.
Hawaiian Airlines Logo
07:00 - 10:49BOS-SFO
6h 49mdirect
Hawaiian Airlines Logo
07:00 - 18:59SFO-BOS
8h 59m1 stop
$404Hawaiian Airlines
Find Deal
mié., 21 may. - dom., 25 may.
Hawaiian Airlines Logo
19:59 - 23:44BOS-SFO
6h 45mdirect
Hawaiian Airlines Logo
20:47 - 05:40SFO-BOS
5h 53mdirect
$405Hawaiian Airlines
Find Deal
jue., 15 may. - lun., 19 may.
Delta Logo
17:15 - 21:04BOS-SFO
6h 49mdirect
Delta Logo
07:00 - 15:45SFO-BOS
5h 45mdirect
$418Delta
Find Deal
mié., 14 may. - mar., 20 may.
Delta Logo
20:30 - 00:16BOS-SFO
6h 46mdirect
Delta Logo
07:00 - 15:45SFO-BOS
5h 45mdirect
$435Delta
Find Deal
jue., 22 may. - dom., 25 may.
United Airlines Logo
11:00 - 14:44BOS-SFO
6h 44mdirect
United Airlines Logo
11:12 - 22:00SFO-BOS
7h 48m1 stop
$441United Airlines
Find Deal
mié., 7 may. - mié., 14 may.

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.
When flying from Boston to San Francisco, you should consider leaving on a Wednesday and avoid Thursdays if you are looking for the best rates. For your return to Boston, you’ll find the best rates on Wednesdays and the most expensive ones on Thursdays.

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 $487 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $673 and $643 respectively.

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

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.
No, with an average price for the route of $1,617, 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. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Good to know

Low season

January

High season

May

Cheapest flight

$186
Best time to beat the crowds (9% less expensive on average)
Most popular time to fly and prices are also 0% 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 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-SFOJuly 2024
Get your boarding pass online and save it to your wallet App on the iPhone. Makes it so easy
Verified travelerFlew with Alaska AirlinesBOS-SFOMar 2024
Long flight duration. Because of weather it took 8 hrs to get there . On my way back it was smooth and short

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 $199 for a return.

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

    Boston and San Francisco are both served by 1 main airport. You will leave Boston from Boston Logan Intl and will be arriving at San Francisco.

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

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

  • 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.

See more FAQs

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

  • Looking for a cheap flight? 25% of our users found flights on this route for $264 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.
See more tips

Prefer to fly 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

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

ANA, Air New Zealand, +21 more

Tuesday

ANA, Air New Zealand, Alaska Airlines, +19 more

ANA, Air New Zealand, +20 more

Wednesday

ANA, Air China, Air New Zealand, +20 more

ANA, Air China, +21 more

Thursday

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

ANA, Air New Zealand, +21 more

Friday

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

ANA, Air New Zealand, +21 more

Saturday

ANA, Air China, Air New Zealand, +20 more

ANA, Air China, +21 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

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

Information on your arrival and departure airports

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