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Cheap flights from Boston to San Francisco from C$ 231

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/9. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SFO
26 Aug — 2 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Boston Logan Intl to San Francisco are usually found in January or September, booked 49 days in advance, depart on a Friday or Wednesday and return on a Tuesday

Cheap flight deals from Boston to San Francisco

Enter your travel dates to find the best prices.

Cheapest flights from Boston to San Francisco
Explore the most affordable flight options available from Boston to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 July 2026.

Tue 25/812:45 p.m.
BOS
-
SFO
1 stop9h 18m
Frontier
Sat 29/810:35 p.m.
SFO
-
BOS
1 stop10h 12m
Frontier
Deal found 21/7C$ 392
Tue 15/95:15 a.m.
BOS
-
SFO
1 stop8h 23m
JetBlue
Wed 23/96:00 a.m.
SFO
-
BOS
1 stop11h 49m
JetBlue
Deal found 21/7C$ 393
Mon 14/912:54 p.m.
BOS
-
SFO
1 stop9h 54m
Frontier
Mon 21/910:05 p.m.
SFO
-
BOS
1 stop11h 02m
Frontier
Deal found 26/7C$ 396
Tue 25/812:45 p.m.
BOS
-
SFO
1 stop9h 18m
Frontier
Sun 30/810:35 p.m.
SFO
-
BOS
1 stop10h 12m
Frontier
Deal found 21/7C$ 399
Wed 30/95:15 a.m.
BOS
-
SFO
1 stop8h 23m
JetBlue
Sun 4/1011:59 p.m.
SFO
-
BOS
1 stop7h 52m
JetBlue
Deal found 26/7C$ 404
Wed 9/95:15 a.m.
BOS
-
SFO
1 stop8h 24m
JetBlue
Wed 16/99:45 p.m.
SFO
-
BOS
Nonstop5h 47m
JetBlue
Deal found 21/7C$ 406
Fri 4/912:42 p.m.
BOS
-
SFO
1 stop9h 31m
JetBlue
Fri 2/1011:49 a.m.
SFO
-
BOS
1 stop9h 12m
JetBlue
Deal found 25/7C$ 407
Sat 3/107:51 a.m.
BOS
-
SFO
1 stop11h 25m
Alaska Airlines
Sat 10/107:03 a.m.
SFO
-
BOS
1 stop19h 18m
Alaska Airlines
Deal found 24/7C$ 418
Tue 15/95:15 a.m.
BOS
-
SFO
1 stop8h 23m
JetBlue
Sat 26/910:10 p.m.
SFO
-
BOS
Nonstop5h 50m
JetBlue
Deal found 21/7C$ 420
Sat 12/99:30 p.m.
BOS
-
SFO
Nonstop6h 26m
JetBlue
Sat 19/98:25 p.m.
SFO
-
BOS
1 stop11h 26m
JetBlue
Deal found 22/7C$ 421
Wed 26/85:16 a.m.
BOS
-
SFO
1 stop9h 04m
JetBlue
Wed 26/83:18 p.m.
SFO
-
BOS
Nonstop5h 41m
JetBlue
Deal found 22/7C$ 427

Find flight deals from Boston to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 27 July 2026.

Round-trip from

C$ 392

One-way from

C$ 231

Popular in

June

Cheapest in

January

Average price

C$ 569

Good round-trip deal

C$ 344 or less

Good one-way deal

C$ 304 or less
Frontier
  • Frontier
  • 24/8-30/8
  • 2 total stops
  • 22h 39m total
  • Boston to San Francisco
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 12/9
  • 1 total stop
  • 9h 45m total
  • Boston to San Francisco
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Boston Logan Intl to San Francisco.
Search Deals
Price to beat on a one-way flight from Boston Logan Intl to San Francisco.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to San Francisco that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 27 July 2026.
Use the filters below to find and compare flights from Boston to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 26/8

4:30 p.m.-12:38 a.m.

1 stop11h 08m

San Francisco

Tue 1/9

3:19 p.m.-12:35 a.m.

Nonstop6h 16m

C$ 420

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 12/9

8:00 a.m.-2:45 p.m.

1 stop9h 45m

San Francisco

Sat 19/9

6:58 p.m.-6:09 a.m.

1 stop8h 11m

C$ 454

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 26/8

8:55 p.m.-12:30 a.m.

Nonstop6h 35m

San Francisco

Mon 31/8

3:19 p.m.-12:35 a.m.

Nonstop6h 16m

C$ 475
Quickest round-trip

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 8/10

8:51 p.m.-12:24 a.m.

Nonstop6h 33m

San Francisco

Sat 10/10

12:40 p.m.-9:20 p.m.

Nonstop5h 40m

C$ 482

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 30/9

8:00 a.m.-5:22 p.m.

1 stop12h 22m

San Francisco

Sun 4/10

8:20 a.m.-5:21 a.m.

1 stop18h 01m

C$ 495

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 2/9

9:20 p.m.-12:52 a.m.

Nonstop6h 32m

San Francisco

Sun 6/9

6:00 a.m.-2:41 p.m.

Nonstop5h 41m

C$ 503

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 27/8

10:00 a.m.-1:33 p.m.

Nonstop6h 33m

San Francisco

Mon 7/9

6:00 a.m.-2:41 p.m.

Nonstop5h 41m

C$ 503

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 25/8

3:50 p.m.-7:22 p.m.

Nonstop6h 32m

San Francisco

Sun 30/8

9:44 p.m.-6:28 a.m.

Nonstop5h 44m

C$ 513

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 12/9

8:00 a.m.-2:45 p.m.

1 stop9h 45m

San Francisco

Mon 21/9

10:06 a.m.-7:39 a.m.

2 stops18h 33m

C$ 517

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sun 13/9

6:50 a.m.-10:13 a.m.

Nonstop6h 23m

San Francisco

Thu 17/9

11:25 a.m.-8:20 p.m.

Nonstop5h 55m

C$ 531

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/7

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Boston to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Boston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

To ensure you get the cheapest price possible for a flight from Boston to San Francisco, you should look to book at least 48 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Boston to San Francisco?

Currently, January is the cheapest month in which you can book a flight from Boston to San Francisco (average of C$ 478). Flying from Boston to San Francisco in June is currently the most expensive (average of C$ 650). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BOS to SFO?

Find hourly flight availability from Boston to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 27 July 2026.

When flying from Boston to San Francisco, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 71% versus a flight at noon.

How much does it cost to fly round-trip from Boston to San Francisco?

Airfare is below average for this route at the moment.

Boston to San Francisco flights typically cost between C$ 469 and C$ 758 in August.
The cheapest round-trip price found within the last 5 days was C$ 392 on Frontier (24 Aug-30 Aug).

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated 27 July 2026.
Get a feel of what it's like to fly with JetBlue from Boston to San Francisco by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
JetBlue
7.1
Good
3,026 reviews
Check prices

Comfort

7.5

Entertainment

7.2

Boarding

7.3

Food

6.6

Crew

7.9

Overall

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Feb 2025

BOS - SFO

Flight was delayed an hour due to a flight plan issue. Then additional fuel was needed. The crew did communicate well. Upon departure there was not food available for purchase, at least not by the time they got to row 23. Wifi didn't work consistently. Not the normal Jetblue experience. The Captain and crew were great though.
JetBlue
7.1
Good
3,026 reviews
JetBlue
7.1
Good
3,026 reviews
Check prices

Comfort

7.5

Entertainment

7.2

Boarding

7.3

Food

6.6

Crew

7.9

Overall

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Feb 2025

BOS - SFO

Flight was delayed an hour due to a flight plan issue. Then additional fuel was needed. The crew did communicate well. Upon departure there was not food available for purchase, at least not by the time they got to row 23. Wifi didn't work consistently. Not the normal Jetblue experience. The Captain and crew were great though.

Related info for your journey

Find useful and relevant information for your journey from Boston to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Boston to San Francisco?

    If you wish to fly to San Francisco from Boston, then you need to book flights from Boston Logan Intl to San Francisco. There are 39 flights from Logan Intl (BOS) to San Francisco (SFO) per day to choose from. Flights to San Francisco from Logan Intl are available from 1 airline, which means you should have some options if you want to compare airfare deals. 6h 31m is how long a nonstop flight from Boston to San Francisco typically takes.

  • How popular is this Boston to San Francisco flight route?

    Flights from Boston Logan Intl to San Francisco have been viewed 5 times in the past calendar month.

  • How long is the flight from Boston to San Francisco?

    For as low as C$ 482, JetBlue can have you in San Francisco from Boston in 6h 33m. Airlines will cover a distance of 4339 km. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Boston to San Francisco round-trip?

    Cheapflights users have booked flights from Boston to San Francisco round-trip from C$ 333. JetBlue is 41% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the most reliable airlines from Boston to San Francisco?

    No one likes to see their flight delayed. When booking a flight from Boston to San Francisco consider choosing LATAM Airlines (85%), Air China (83%) or Korean Air (82%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Boston to San Francisco?

    On average you can expect to pay C$ 368 for a flight from Boston to San Francisco. The cheapest flight overall is C$ 280 while the most popular route, (Boston Logan Intl - San Francisco) is currently priced at C$ 434.

  • Can I find deals for flights from Boston to San Francisco that include hotel bookings?

    Yes. In addition to deals on Boston to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to San Francisco?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to San Francisco.

  • Can I find deals for business class flights from Boston to San Francisco?

    Yes. Cheapflights offers flight deals from Boston to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, January is the cheapest month in which you can book a flight from Boston to San Francisco (average of C$ 478). Flying from Boston to San Francisco in June is currently the most expensive (average of C$ 650). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Clara
Burlingame
San Bruno
Roseville
Livermore
South San Francisco
Novato
Vallejo

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Alternative routes for Boston to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.
Boston to Las Vegas flights
Boston to Los Angeles flights

Top airline flying from Boston to San Francisco

Discover the top airline that operate flights from Boston to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 27 July 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapestC$ 333AverageC$ 402FlexibilityNo cancel feeOn-time62%
Search JetBlue flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Boston to San Francisco?

When you search for this flight from Boston to San Francisco, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Boston to San Francisco?

Cheapflights helps you find that perfect flight to San Francisco from Boston by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Boston to San Francisco with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Boston to San Francisco, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Boston to San Francisco become cheaper?

Not ready to book yet? You can track prices for flights from Boston to San Francisco on Cheapflights with our Price Alert feature and get notified when better prices are available.

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