Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Boston to San Francisco from C$ 163

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 24/3. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SFO
25 Feb — 4 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Boston Logan Intl to San Francisco are usually found in March or September, booked 67 days in advance, depart on a Saturday 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 26 January 2026.

Wed 18/27:45 a.m.
BOS
-
SFO
Nonstop7h 02m
Delta
Wed 4/31:00 p.m.
SFO
-
BOS
Nonstop5h 35m
Delta
Deal found 24/1C$ 297
Wed 18/26:00 a.m.
BOS
-
SFO
1 stop9h 15m
United Airlines
Mon 23/211:20 p.m.
SFO
-
BOS
Nonstop5h 38m
United Airlines
Deal found 24/1C$ 311
Thu 19/25:35 p.m.
BOS
-
SFO
Nonstop7h 00m
Delta
Tue 24/31:00 p.m.
SFO
-
BOS
Nonstop5h 39m
Delta
Deal found 25/1C$ 325
Wed 18/38:59 p.m.
BOS
-
SFO
Nonstop6h 52m
JetBlue
Mon 30/310:00 p.m.
SFO
-
BOS
Nonstop5h 34m
JetBlue
Deal found 23/1C$ 326
Thu 19/27:45 a.m.
BOS
-
SFO
Nonstop7h 02m
Delta
Wed 25/27:10 a.m.
SFO
-
BOS
Nonstop5h 39m
Delta
Deal found 26/1C$ 329
Tue 24/25:44 p.m.
BOS
-
SFO
1 stop9h 15m
Alaska Airlines
Mon 2/37:28 p.m.
SFO
-
BOS
1 stop8h 26m
Alaska Airlines
Deal found 26/1C$ 336
Thu 12/37:40 a.m.
BOS
-
SFO
Nonstop6h 58m
Delta
Wed 18/37:25 a.m.
SFO
-
BOS
Nonstop5h 32m
Delta
Deal found 25/1C$ 338
Fri 13/38:59 p.m.
BOS
-
SFO
Nonstop6h 52m
JetBlue
Wed 18/33:25 p.m.
SFO
-
BOS
Nonstop5h 33m
JetBlue
Deal found 23/1C$ 345
Thu 19/22:16 p.m.
BOS
-
SFO
1 stop12h 41m
JetBlue
Thu 26/23:25 p.m.
SFO
-
BOS
Nonstop5h 33m
JetBlue
Deal found 24/1C$ 349
Sun 22/26:00 a.m.
BOS
-
SFO
Nonstop6h 58m
United Airlines
Thu 26/24:10 p.m.
SFO
-
BOS
Nonstop5h 39m
United Airlines
Deal found 24/1C$ 351

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 26 January 2026.

Round-trip from

C$ 297

One-way from

C$ 163

Popular in

December

Cheapest in

March

Average price

C$ 468
Delta
  • Delta
  • 18/2-24/2
  • Nonstop
  • 12h 41m total
  • Boston to San Francisco
Search Deals
United Airlines
  • United Airlines
  • 24/3
  • Nonstop
  • 7h 00m total
  • Boston to San Francisco
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 26 January 2026.
Use the filters below to find and compare flights from Boston to San Francisco that are best for you.

Fly from

Boston

Fly to

San Francisco

Route

Depart

Return

Price

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 26/2

7:00 a.m.-11:00 a.m.

Nonstop7h 00m

San Francisco

Mon 2/3

8:44 p.m.-5:15 a.m.

Nonstop5h 31m

C$ 297

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Mon 23/2

8:33 p.m.-12:25 a.m.

Nonstop6h 52m

San Francisco

Wed 18/3

3:25 p.m.-11:58 p.m.

Nonstop5h 33m

C$ 325

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 18/3

8:59 p.m.-12:51 a.m.

Nonstop6h 52m

San Francisco

Mon 30/3

10:00 p.m.-6:34 a.m.

Nonstop5h 34m

C$ 326

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 19/2

5:35 p.m.-9:35 p.m.

Nonstop7h 00m

San Francisco

Wed 25/2

1:00 p.m.-9:35 p.m.

Nonstop5h 35m

C$ 329

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 26/2

7:45 a.m.-11:47 a.m.

Nonstop7h 02m

San Francisco

Wed 25/3

1:00 p.m.-9:39 p.m.

Nonstop5h 39m

C$ 338

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Mon 23/2

5:35 p.m.-9:35 p.m.

Nonstop7h 00m

San Francisco

Wed 18/3

7:25 a.m.-3:57 p.m.

Nonstop5h 32m

C$ 352

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 26/2

7:45 a.m.-11:47 a.m.

Nonstop7h 02m

San Francisco

Mon 2/3

7:10 a.m.-3:49 p.m.

Nonstop5h 39m

C$ 352

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 1/4

10:30 a.m.-2:00 p.m.

Nonstop6h 30m

San Francisco

Mon 6/4

10:00 p.m.-6:40 a.m.

Nonstop5h 40m

C$ 363

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 5/3

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

Nonstop7h 00m

San Francisco

Mon 9/3

11:59 p.m.-10:50 a.m.

1 stop7h 51m

C$ 366

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sun 8/2

6:00 a.m.-11:49 a.m.

1 stop8h 49m

C$ 163

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/1

Showing 1-10 of 20 results
1
2

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 23 January 2026.

To ensure you get the cheapest price possible for a flight from Boston to San Francisco, you should look to book at least 67 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, March is the cheapest month in which you can book a flight from Boston to San Francisco (average of C$ 138). Flying from Boston to San Francisco in July is currently the most expensive (average of C$ 257). 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 26 January 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 morning, which can drop the price by up to 68% 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 26 January 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
2,893 reviews
Check prices

Boarding

7.4

Comfort

7.5

Entertainment

7.2

Crew

8.0

Overall

7.2

Food

6.6

Reviews

1 / 20
4.0
Okay

Jeff,Dec 2025

LAX - BOS

We boarded an hour and a half late and the crew was very salty when asked why. Still got no reason other than someone took the intended plane? Won't fly with them again.
JetBlue
7.2
Good
2,893 reviews
JetBlue
7.2
Good
2,893 reviews
Check prices

Boarding

7.4

Comfort

7.5

Entertainment

7.2

Crew

8.0

Overall

7.2

Food

6.6

Reviews

1 / 20
4.0
Okay

Jeff,Dec 2025

LAX - BOS

We boarded an hour and a half late and the crew was very salty when asked why. Still got no reason other than someone took the intended plane? Won't fly with them again.

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 23 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 42m 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$ 297, JetBlue can have you in San Francisco from Boston in 7h. Airlines will cover a distance of 4339 km. All flights are typically direct.

  • 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$ 162. JetBlue is 67% 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 KLM (97%), Hawaiian Airlines (85%) or JetBlue (85%) 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, March is the cheapest month in which you can book a flight from Boston to San Francisco (average of C$ 138). Flying from Boston to San Francisco in July is currently the most expensive (average of C$ 257). 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
Newark
Burlingame
South San Francisco
Scotts Valley
Novato
Santa Clara
Vallejo

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Boston to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.
Boston to Los Angeles flights
Boston to Las Vegas 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 26 January 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapestC$ 162AverageC$ 391FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.