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Cheap flights from San Francisco to Boston from C$ 182

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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BOS
10 Apr — 17 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from San Francisco to Boston

Enter your travel dates to find the best prices.

Cheapest flights from San Francisco to Boston
Explore the most affordable flight options available from San Francisco to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 March 2026.

Thu 28/56:16 a.m.
SFO
-
BOS
1 stop20h 28m
Alaska Airlines
Tue 2/66:00 a.m.
BOS
-
SFO
1 stop9h 41m
Alaska Airlines
Deal found 9/3C$ 349
Wed 12/812:20 p.m.
SFO
-
BOS
Nonstop5h 51m
Delta
Wed 19/88:55 p.m.
BOS
-
SFO
Nonstop7h 01m
Delta
Deal found 7/3C$ 363
Tue 2/69:31 p.m.
SFO
-
BOS
Nonstop5h 42m
JetBlue
Tue 18/88:55 p.m.
BOS
-
SFO
Nonstop6h 36m
JetBlue
Deal found 8/3C$ 369
Mon 18/59:30 p.m.
SFO
-
BOS
Nonstop5h 38m
JetBlue
Fri 22/59:25 p.m.
BOS
-
SFO
Nonstop6h 41m
JetBlue
Deal found 9/3C$ 376
Fri 10/49:00 a.m.
SFO
-
BOS
Nonstop5h 45m
JetBlue
Fri 17/44:50 p.m.
BOS
-
SFO
Nonstop6h 46m
JetBlue
Deal found 9/3C$ 377
Wed 8/46:40 p.m.
SFO
-
BOS
1 stop8h 13m
Alaska Airlines
Tue 14/46:00 a.m.
BOS
-
SFO
2 stops20h 19m
Alaska Airlines
Deal found 8/3C$ 382
Tue 31/312:35 p.m.
SFO
-
BOS
1 stop8h 24m
United Airlines
Sun 5/47:30 a.m.
BOS
-
SFO
Nonstop6h 46m
United Airlines
Deal found 7/3C$ 384
Tue 11/82:50 p.m.
SFO
-
BOS
Nonstop5h 51m
Delta
Wed 12/87:00 a.m.
BOS
-
SFO
Nonstop6h 57m
Delta
Deal found 10/3C$ 390
Tue 19/510:29 a.m.
SFO
-
BOS
1 stop11h 13m
Delta
Wed 27/54:59 p.m.
BOS
-
SFO
Nonstop6h 37m
Delta
Deal found 7/3C$ 394
Sun 17/59:30 p.m.
SFO
-
BOS
Nonstop5h 38m
JetBlue
Wed 27/54:40 p.m.
BOS
-
SFO
Nonstop6h 41m
JetBlue
Deal found 9/3C$ 396
Tue 19/510:40 p.m.
SFO
-
BOS
2 stops10h 35m
Southwest
Sat 6/63:05 p.m.
BOS
-
SFO
1 stop8h 00m
Southwest
Deal found 7/3C$ 398
Sun 5/710:00 p.m.
SFO
-
BOS
Nonstop5h 54m
Delta
Tue 7/78:55 p.m.
BOS
-
SFO
Nonstop7h 01m
Delta
Deal found 8/3C$ 401

Find flight deals from San Francisco to Boston

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Boston (BOS). 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 11 March 2026.

Round-trip from

C$ 349

One-way from

C$ 182

Popular in

December

Cheapest in

January

Average price

C$ 542
Alaska Airlines
  • Alaska Airlines
  • 28/5-2/6
  • 2 total stops
  • 30h 09m total
  • San Francisco to Boston
Search Deals
Delta
  • Delta
  • 9/6
  • Nonstop
  • 5h 54m total
  • San Francisco to Boston
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (C$ 3 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 14 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 San Francisco to Boston 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 11 March 2026.
Use the filters below to find and compare flights from San Francisco to Boston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 6/5

10:25 a.m.-11:59 p.m.

1 stop10h 34m

Boston Logan Intl

Thu 7/5

4:33 p.m.-11:44 p.m.

1 stop10h 11m

C$ 349
Quickest round-trip

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 18/5

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

Nonstop5h 51m

Boston Logan Intl

Tue 19/5

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

Nonstop6h 33m

C$ 396

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Thu 28/5

9:15 p.m.-8:05 a.m.

1 stop7h 50m

Boston Logan Intl

Wed 3/6

2:25 p.m.-9:25 p.m.

1 stop10h 00m

C$ 403

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 13/4

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

Nonstop5h 40m

Boston Logan Intl

Tue 14/4

3:00 p.m.-11:56 p.m.

1 stop11h 56m

C$ 434

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Thu 4/6

6:16 a.m.-5:44 a.m.

1 stop20h 28m

Boston Logan Intl

Thu 11/6

7:36 p.m.-9:20 a.m.

1 stop16h 44m

C$ 437

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 28/4

10:50 p.m.-10:29 a.m.

1 stop8h 39m

Boston Logan Intl

Wed 29/4

5:06 p.m.-11:55 p.m.

1 stop9h 49m

C$ 466

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Thu 4/6

10:25 p.m.-10:48 a.m.

1 stop9h 23m

Boston Logan Intl

Thu 11/6

5:20 p.m.-8:57 p.m.

Nonstop6h 37m

C$ 500
Cheapest one-way
Quickest one-way

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 9/6

2:50 p.m.-11:41 p.m.

Nonstop5h 51m

C$ 182

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 8/5

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

Nonstop5h 51m

C$ 189

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 1/6

6:16 a.m.-5:44 a.m.

1 stop20h 28m

C$ 196

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/3

Showing 1-10 of 13 resultsSorted by cheapest first
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Best time to book a flight from San Francisco to Boston

Have a flexible travel schedule? Discover the best time to fly to Boston from San Francisco 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 San Francisco to Boston

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

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

Booking 69 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Francisco to Boston. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, December is the cheapest month in which you can book a flight from San Francisco to Boston (average of C$ 160). Flying from San Francisco to Boston in January 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 SFO to BOS?

Find hourly flight availability from San Francisco to Boston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 11 March 2026.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 77% on flights from San Francisco to Boston by exploring options for tickets in the evening.

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

Related info for your journey

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

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

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

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

    A quick flight from San Francisco to Boston can take about 5h 51m. Alaska Airlines provides one of the quickest options available for as low as C$ 396. The distance from San Francisco to Boston is about 4339 km. Both multi-stop and direct flights can be found to your destination and back.

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

    Consider WestJet (100%), LATAM Airlines (94%) or Virgin Atlantic (93%) when booking your flight. These represent the most reliable airlines when flying from San Francisco to Boston.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Francisco to Boston 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 San Francisco to Boston?

    Currently, December is the cheapest month in which you can book a flight from San Francisco to Boston (average of C$ 160). Flying from San Francisco to Boston in January 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 Boston?

Book flights to Boston if you plan to visit one of these locations
Medford
Merrimack
Chelsea
Milford
Braintree
Hampton
Old Orchard Beach
Revere
Waltham
Kennebunk
Watertown
Warwick
Lawrence
Pawtucket
Seekonk
Nashua

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from San Francisco to Boston for you. Better yet — we are completely free to use.

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

Yes, we can. To see specific flights from San Francisco to Boston with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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Of course! You can now track prices for flights from San Francisco to Boston and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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