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Cheap flights from Boston to San Francisco from C$ 176

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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SFO
12 Apr — 19 Apr1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Boston Logan Intl to San Francisco are usually found in September or January, booked 90 days in advance, depart on a Thursday or Tuesday and return on a Monday

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 13 March 2026.

Tue 5/56:42 p.m.
BOS
-
SFO
1 stop17h 45m
Alaska Airlines
Wed 27/56:16 a.m.
SFO
-
BOS
1 stop20h 28m
Alaska Airlines
Deal found 9/3C$ 350
Tue 14/78:55 p.m.
BOS
-
SFO
Nonstop7h 01m
Delta
Wed 12/812:20 p.m.
SFO
-
BOS
Nonstop5h 51m
Delta
Deal found 9/3C$ 363
Sun 24/57:35 a.m.
BOS
-
SFO
Nonstop6h 42m
Delta
Tue 14/72:50 p.m.
SFO
-
BOS
Nonstop5h 51m
Delta
Deal found 9/3C$ 370
Wed 6/57:00 a.m.
BOS
-
SFO
1 stop10h 21m
Alaska Airlines
Sat 9/57:59 p.m.
SFO
-
BOS
1 stop16h 34m
Alaska Airlines
Deal found 10/3C$ 377
Thu 2/47:40 a.m.
BOS
-
SFO
Nonstop6h 58m
Delta
Wed 8/47:25 a.m.
SFO
-
BOS
Nonstop5h 35m
Delta
Deal found 8/3C$ 380
Mon 4/54:33 p.m.
BOS
-
SFO
2 stops18h 07m
Alaska Airlines
Tue 12/56:01 p.m.
SFO
-
BOS
1 stop8h 43m
Alaska Airlines
Deal found 8/3C$ 382
Wed 12/87:00 a.m.
BOS
-
SFO
Nonstop6h 57m
Delta
Wed 19/82:50 p.m.
SFO
-
BOS
Nonstop5h 51m
Delta
Deal found 10/3C$ 390
Tue 25/84:34 p.m.
BOS
-
SFO
1 stop9h 10m
American Airlines
Tue 1/97:58 a.m.
SFO
-
BOS
1 stop8h 37m
American Airlines
Deal found 9/3C$ 393
Sun 24/57:35 a.m.
BOS
-
SFO
Nonstop6h 42m
Delta
Sun 19/710:00 p.m.
SFO
-
BOS
Nonstop5h 54m
Delta
Deal found 9/3C$ 397
Wed 6/56:20 a.m.
BOS
-
SFO
2 stops16h 35m
Southwest
Fri 8/510:55 p.m.
SFO
-
BOS
1 stop11h 15m
Southwest
Deal found 11/3C$ 399
Sat 30/56:00 a.m.
BOS
-
SFO
Nonstop6h 27m
United Airlines
Sat 6/69:25 p.m.
SFO
-
BOS
Nonstop5h 56m
United Airlines
Deal found 8/3C$ 400

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 13 March 2026.

Round-trip from

C$ 350

One-way from

C$ 176

Popular in

December

Cheapest in

September

Average price

C$ 517
Alaska Airlines
  • Alaska Airlines
  • 5/5-27/5
  • 2 total stops
  • 38h 13m total
  • Boston to San Francisco
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 4/5
  • 1 total stop
  • 10h 11m total
  • Boston to San Francisco
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (C$ 7 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 13 March 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 6/5

8:45 p.m.-12:27 a.m.

Nonstop6h 42m

San Francisco

Mon 11/5

9:54 p.m.-6:45 a.m.

Nonstop5h 51m

C$ 377

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 2/4

5:30 a.m.-9:11 a.m.

Nonstop6h 41m

San Francisco

Thu 30/4

9:25 p.m.-6:27 a.m.

Nonstop6h 02m

C$ 404
Quickest round-trip

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 25/8

8:55 p.m.-12:31 a.m.

Nonstop6h 36m

San Francisco

Tue 1/9

12:30 p.m.-9:18 p.m.

Nonstop5h 48m

C$ 418

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 25/3

11:00 a.m.-2:52 p.m.

Nonstop6h 52m

San Francisco

Tue 31/3

10:15 a.m.-7:06 p.m.

Nonstop5h 51m

C$ 424

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 9/4

9:15 p.m.-1:04 a.m.

Nonstop6h 49m

San Francisco

Sun 19/4

2:00 p.m.-10:45 p.m.

Nonstop5h 45m

C$ 444

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 20/5

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

1 stop11h 00m

San Francisco

Thu 28/5

10:10 a.m.-11:55 p.m.

2 stops10h 45m

C$ 495

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 23/4

7:00 a.m.-9:23 p.m.

1 stop17h 23m

San Francisco

Thu 30/4

8:00 a.m.-11:59 p.m.

2 stops12h 59m

C$ 499

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 13/5

5:35 a.m.-10:40 a.m.

1 stop8h 05m

San Francisco

Wed 27/5

7:15 p.m.-8:05 a.m.

2 stops9h 50m

C$ 505

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 25/8

8:30 a.m.-4:25 p.m.

1 stop10h 55m

San Francisco

Tue 1/9

7:40 a.m.-9:25 p.m.

2 stops10h 45m

C$ 506

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 2/6

11:40 a.m.-7:55 p.m.

2 stops11h 15m

San Francisco

Sat 6/6

5:20 a.m.-6:20 p.m.

2 stops10h 00m

C$ 527

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/3

Showing 1-10 of 23 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?

Use this chart to determine the optimal time to book a round-trip flight from Boston to San Francisco. Price data was last updated on 6 March 2026.

To ensure you get the cheapest price possible for a flight from Boston to San Francisco, you should look to book at least 90 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, November is the cheapest month in which you can book a flight from Boston to San Francisco (average of C$ 203). Flying from Boston to San Francisco in January is currently the most expensive (average of C$ 268). 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 13 March 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.

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 13 March 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
7.2
Good
2,904 reviews
Check prices

Entertainment

7.2

Overall

7.2

Comfort

7.5

Crew

8.0

Boarding

7.4

Food

6.6

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

FLL - ORH

I pay extra for an even more seat row 3, but the luggage area has no more spots so i have to place my luggage in row 10. This was totally un accepatable.
JetBlue
7.2
Good
2,904 reviews
JetBlue
7.2
Good
2,904 reviews
Check prices

Entertainment

7.2

Overall

7.2

Comfort

7.5

Crew

8.0

Boarding

7.4

Food

6.6

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

FLL - ORH

I pay extra for an even more seat row 3, but the luggage area has no more spots so i have to place my luggage in row 10. This was totally un accepatable.

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 28 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 50m 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$ 418, JetBlue can have you in San Francisco from Boston in 6h 34m. 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$ 161. JetBlue is 68% 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 Southwest (100%), JetBlue (83%) or WestJet (81%) as they are the most reliable in getting you off to your destination on time.

  • 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, November is the cheapest month in which you can book a flight from Boston to San Francisco (average of C$ 203). Flying from Boston to San Francisco in January is currently the most expensive (average of C$ 268). 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
Richmond
Burlingame
South San Francisco
Scotts Valley
Novato
Santa Clara
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 13 March 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapestC$ 161AverageC$ 388FlexibilityNo 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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