Cheap flights from Boston to San Francisco from C$ 202

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 30/5. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SFO
27 May — 3 Jun1
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 90 days in advance, depart on a Wednesday or Monday 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 27 April 2026.

Tue 4/85:35 a.m.
BOS
-
SFO
1 stop8h 00m
Southwest
Tue 11/86:00 p.m.
SFO
-
BOS
1 stop9h 00m
Southwest
Deal found 22/4C$ 395
Tue 2/68:05 a.m.
BOS
-
SFO
1 stop11h 56m
Alaska Airlines
Tue 9/66:16 a.m.
SFO
-
BOS
1 stop20h 28m
Alaska Airlines
Deal found 22/4C$ 396
Tue 18/87:55 a.m.
BOS
-
SFO
Nonstop6h 35m
JetBlue
Tue 18/83:19 p.m.
SFO
-
BOS
Nonstop5h 40m
JetBlue
Deal found 25/4C$ 399
Wed 19/88:15 a.m.
BOS
-
SFO
2 stops11h 10m
Southwest
Sat 29/89:25 a.m.
SFO
-
BOS
1 stop7h 25m
Southwest
Deal found 22/4C$ 402
Wed 27/56:40 p.m.
BOS
-
SFO
1 stop17h 53m
Alaska Airlines
Sat 30/56:58 p.m.
SFO
-
BOS
1 stop8h 22m
Alaska Airlines
Deal found 23/4C$ 406
Sat 23/57:13 a.m.
BOS
-
SFO
Nonstop6h 40m
JetBlue
Sat 30/53:10 p.m.
SFO
-
BOS
Nonstop5h 48m
JetBlue
Deal found 22/4C$ 407
Thu 4/68:05 a.m.
BOS
-
SFO
1 stop17h 18m
Alaska Airlines
Wed 10/67:55 a.m.
SFO
-
BOS
1 stop18h 45m
Alaska Airlines
Deal found 23/4C$ 409
Tue 12/55:56 p.m.
BOS
-
SFO
1 stop18h 37m
Alaska Airlines
Sat 16/56:16 a.m.
SFO
-
BOS
1 stop20h 28m
Alaska Airlines
Deal found 23/4C$ 410
Tue 26/56:40 p.m.
BOS
-
SFO
1 stop17h 53m
Alaska Airlines
Fri 29/56:16 a.m.
SFO
-
BOS
1 stop20h 28m
Alaska Airlines
Deal found 23/4C$ 413
Wed 27/56:40 p.m.
BOS
-
SFO
1 stop23h 21m
Alaska Airlines
Tue 9/66:16 a.m.
SFO
-
BOS
1 stop20h 28m
Alaska Airlines
Deal found 22/4C$ 414
Tue 9/63:45 p.m.
BOS
-
SFO
2 stops10h 30m
Southwest
Tue 16/68:55 a.m.
SFO
-
BOS
1 stop11h 05m
Southwest
Deal found 22/4C$ 417
Fri 3/77:20 a.m.
BOS
-
SFO
Nonstop6h 39m
Delta
Tue 25/82:50 p.m.
SFO
-
BOS
Nonstop5h 51m
Delta
Deal found 26/4C$ 420

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 April 2026.

Round-trip from

C$ 395

One-way from

C$ 202

Popular in

April

Cheapest in

January

Average price

C$ 649
Southwest
  • Southwest
  • 4/8-11/8
  • 2 total stops
  • 17h 00m total
  • Boston to San Francisco
JetBlue
  • JetBlue
  • 30/5
  • Nonstop
  • 6h 43m total
  • Boston to San Francisco
Highest demand for flights based on searches. 7% potential increase in price (C$ 54 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease (C$ 16 potential savings vs. average RT price).
Average for round-trip flights in April 2026

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 April 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 1/7

6:00 a.m.-9:27 a.m.

Nonstop6h 27m

San Francisco

Wed 8/7

12:25 p.m.-9:21 p.m.

Nonstop5h 56m

C$ 447
Quickest round-trip

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sun 6/9

6:35 a.m.-10:06 a.m.

Nonstop6h 31m

San Francisco

Sat 12/9

1:00 p.m.-9:47 p.m.

Nonstop5h 47m

C$ 495

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 23/5

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

1 stop18h 49m

San Francisco

Sat 30/5

6:58 p.m.-6:20 a.m.

1 stop8h 22m

C$ 510

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 13/5

8:10 a.m.-8:55 p.m.

1 stop15h 45m

San Francisco

Wed 20/5

5:25 a.m.-4:05 p.m.

1 stop7h 40m

C$ 522

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 14/10

8:55 p.m.-12:50 a.m.

Nonstop6h 55m

San Francisco

Sun 18/10

10:00 p.m.-6:45 a.m.

Nonstop5h 45m

C$ 523

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Mon 27/7

8:20 p.m.-11:57 p.m.

Nonstop6h 37m

San Francisco

Fri 31/7

11:05 p.m.-8:01 a.m.

Nonstop5h 56m

C$ 584

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sun 9/8

5:40 a.m.-10:27 a.m.

1 stop7h 47m

San Francisco

Sat 15/8

10:00 p.m.-6:51 a.m.

Nonstop5h 51m

C$ 590

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 19/6

8:05 p.m.-1:42 a.m.

1 stop8h 37m

San Francisco

Tue 23/6

6:56 p.m.-5:58 a.m.

1 stop8h 02m

C$ 597

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 30/6

5:35 a.m.-1:40 p.m.

2 stops11h 05m

San Francisco

Tue 7/7

8:55 a.m.-11:20 p.m.

2 stops11h 25m

C$ 618

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 21/5

8:59 p.m.-12:32 a.m.

Nonstop6h 33m

San Francisco

Sun 24/5

7:05 a.m.-4:01 p.m.

Nonstop5h 56m

C$ 618

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/4

Showing 1-10 of 23 resultsSorted by cheapest first
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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 89 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$ 463). Flying from Boston to San Francisco in April is currently the most expensive (average of C$ 649). 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 April 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 74% versus a flight at noon.

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

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 April 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.

Comfort

7.5

Food

6.6

Crew

7.9

Overall

7.2

Boarding

7.3

Entertainment

7.2

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.

Comfort

7.5

Food

6.6

Crew

7.9

Overall

7.2

Boarding

7.3

Entertainment

7.2

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 27 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 33m is how long a nonstop flight from Boston to San Francisco typically takes.

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

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

    For as low as C$ 447, United Airlines can have you in San Francisco from Boston in 6h 27m. 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$ 162. JetBlue is 69% 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 WestJet (88%), Japan Airlines (79%) or United Airlines (78%) 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, January is the cheapest month in which you can book a flight from Boston to San Francisco (average of C$ 463). Flying from Boston to San Francisco in April is currently the most expensive (average of C$ 649). 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
Burlingame
San Bruno
Roseville
Livermore
South San Francisco
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.

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 April 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapestC$ 162AverageC$ 390FlexibilityNo cancel feeOn-time62%
Search JetBlue flights

Fly with Cheapflights

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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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