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Cheap flights from Boston to San Francisco from C$ 165

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 11/2. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SFO
11 Jan — 18 Jan1
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 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 12 December 2025.

Sat 13/127:25 a.m.BOS - SFO
Nonstop6h 57mDelta
Wed 28/17:10 a.m.SFO - BOS
Nonstop5h 41mDelta
Deal found 10/12C$ 485
Mon 15/129:10 a.m.BOS - SFO
1 stop9h 19mUnited Airlines
Tue 3/28:25 a.m.SFO - BOS
Nonstop5h 48mUnited Airlines
Deal found 11/12C$ 499
Tue 16/126:52 p.m.BOS - SFO
Nonstop6h 56mAlaska Airlines
Tue 31/39:10 a.m.SFO - BOS
1 stop11h 44mAlaska Airlines
Deal found 10/12C$ 503
Mon 15/124:24 p.m.BOS - SFO
1 stop10h 24mAlaska Airlines
Tue 3/27:00 a.m.SFO - BOS
1 stop7h 39mAlaska Airlines
Deal found 11/12C$ 512
Sat 13/127:25 a.m.BOS - SFO
Nonstop6h 57mDelta
Sat 10/17:10 a.m.SFO - BOS
Nonstop5h 41mDelta
Deal found 10/12C$ 527
Wed 17/127:45 a.m.BOS - SFO
1 stop8h 35mSouthwest
Fri 16/111:55 a.m.SFO - BOS
1 stop7h 15mSouthwest
Deal found 10/12C$ 534
Tue 23/125:57 p.m.BOS - SFO
Nonstop6h 53mUnited Airlines
Thu 1/19:30 p.m.SFO - BOS
1 stop8h 49mUnited Airlines
Deal found 11/12C$ 538
Wed 17/121:35 p.m.BOS - SFO
1 stop9h 09mUnited Airlines
Fri 16/111:25 p.m.SFO - BOS
Nonstop5h 45mUnited Airlines
Deal found 10/12C$ 541
Mon 15/126:52 p.m.BOS - SFO
Nonstop6h 56mAlaska Airlines
Mon 5/13:07 p.m.SFO - BOS
1 stop12h 03mAlaska Airlines
Deal found 10/12C$ 545
Sun 14/126:52 p.m.BOS - SFO
Nonstop6h 56mAlaska Airlines
Tue 6/17:25 a.m.SFO - BOS
Nonstop5h 47mAlaska Airlines
Deal found 10/12C$ 548
Sat 13/126:52 p.m.BOS - SFO
Nonstop6h 56mAlaska Airlines
Wed 28/12:58 p.m.SFO - BOS
1 stop21h 22mAlaska Airlines
Deal found 11/12C$ 554

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 12 December 2025.

Round-trip from

C$ 312

One-way from

C$ 164

Popular in

December

Cheapest in

March

Average price

C$ 608

Good round-trip deal

C$ 393 or less
Alaska Airlines
  • Alaska Airlines
  • 20/1-27/1
  • 2 total stops
  • 17h 06m total
  • Boston to San Francisco
Search Deals
Southwest
  • Southwest
  • 20/1
  • 2 total stops
  • 10h 30m total
  • Boston to San Francisco
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 29 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Boston Logan Intl to San Francisco.
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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 12 December 2025.
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

Wed 21/1

5:40 p.m.-9:42 p.m.

Nonstop7h 02m

San Francisco

Sun 25/1

7:10 a.m.-3:51 p.m.

Nonstop5h 41m

C$ 313

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 17/1

5:40 p.m.-9:42 p.m.

Nonstop7h 02m

San Francisco

Tue 20/1

1:00 p.m.-9:37 p.m.

Nonstop5h 37m

C$ 313

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Mon 12/1

7:09 p.m.-10:59 p.m.

Nonstop6h 50m

San Francisco

Tue 20/1

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

Nonstop5h 33m

C$ 314

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 10/2

7:50 a.m.-11:50 a.m.

Nonstop7h 00m

San Francisco

Wed 18/2

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

Nonstop5h 39m

C$ 331

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 13/1

7:30 a.m.-5:58 p.m.

1 stop13h 28m

San Francisco

Tue 20/1

1:00 p.m.-9:37 p.m.

Nonstop5h 37m

C$ 338

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sun 18/1

4:20 p.m.-10:47 p.m.

1 stop9h 27m

San Francisco

Wed 21/1

7:00 a.m.-5:39 p.m.

1 stop7h 39m

C$ 339

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 22/1

5:57 p.m.-9:50 p.m.

Nonstop6h 53m

San Francisco

Mon 26/1

11:05 a.m.-7:51 p.m.

Nonstop5h 46m

C$ 341

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 23/1

10:56 a.m.-2:51 p.m.

Nonstop6h 55m

San Francisco

Sun 1/2

11:25 p.m.-8:10 a.m.

Nonstop5h 45m

C$ 341

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 17/1

5:40 p.m.-9:42 p.m.

Nonstop7h 02m

San Francisco

Thu 22/1

7:10 a.m.-3:51 p.m.

Nonstop5h 41m

C$ 341

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 31/1

5:40 p.m.-9:42 p.m.

Nonstop7h 02m

San Francisco

Thu 5/2

7:10 a.m.-3:51 p.m.

Nonstop5h 41m

C$ 341

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

Showing 1-10 of 23 results
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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 5 December 2025.

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$ 142). Flying from Boston to San Francisco in May is currently the most expensive (average of C$ 247). 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 12 December 2025.

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 69% 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 12 December 2025.
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
2,899 reviews
Check prices

Boarding

7.4

Food

6.7

Entertainment

7.2

Crew

8.0

Comfort

7.6

Overall

7.2

Reviews

1 / 20
2.0
Mediocre

Samuel,Nov 2025

PBI - HPN

Incessant announcements hawking the JB Card, other items to purchase, seat back tables up 45 minutes before we landed....more announcements....Give your customer a break!
JetBlue
7.2
Good
2,899 reviews
JetBlue
7.2
Good
2,899 reviews
Check prices

Boarding

7.4

Food

6.7

Entertainment

7.2

Crew

8.0

Comfort

7.6

Overall

7.2

Reviews

1 / 20
2.0
Mediocre

Samuel,Nov 2025

PBI - HPN

Incessant announcements hawking the JB Card, other items to purchase, seat back tables up 45 minutes before we landed....more announcements....Give your customer a break!

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 34 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 52m 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 6 times in the past calendar month.

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

    For as low as C$ 314, Delta can have you in San Francisco from Boston in 6h 50m. 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$ 163. 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 China Eastern (100%), Air China (93%) or ANA (89%) 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$ 393 for a flight from Boston to San Francisco. The cheapest flight overall is C$ 376 while the most popular route, (Boston Logan Intl - San Francisco) is currently priced at C$ 683.

  • 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$ 142). Flying from Boston to San Francisco in May is currently the most expensive (average of C$ 247). 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
Redwood City
Burlingame
South San Francisco
Scotts Valley
Novato
Santa Clara
Vallejo

Browse thousands of different options on Cheapflights for your next trip

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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 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 12 December 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapestC$ 376AverageC$ 395FlexibilityNo 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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