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Cheap flights from San Francisco to Boston from C$ 226

SFO — BOS
7 Oct — 14 Oct1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from San Francisco to Boston Logan Intl are usually found in January or February, booked 71 days in advance, depart on a Tuesday or Monday and return on a Friday

Cheap flight deals from San Francisco to Boston

Enter your travel dates to find the best prices.

Cheapest flights from San Francisco to Boston

Mon 26/103:00 p.m. -
Nonstop5h 39m
Mon 9/118:10 p.m. -
Nonstop6h 48m
Deal found 6/9C$ 439
Mon 26/107:00 a.m. -
Nonstop5h 45m
Sun 1/117:45 a.m. -
Nonstop6h 40m
Deal found 3/9C$ 440
Wed 21/1012:40 p.m. -
Nonstop5h 40m
Wed 28/105:45 p.m. -
Nonstop6h 38m
Deal found 6/9C$ 445
Fri 4/1212:45 p.m. -
1 stop8h 04m
Wed 9/129:45 a.m. -
Nonstop6h 53m
Deal found 4/9C$ 447
Tue 20/109:35 p.m. -
1 stop8h 15m
Tue 27/105:55 p.m. -
1 stop8h 45m
Deal found 3/9C$ 450
Sat 26/93:00 p.m. -
Nonstop5h 46m
Wed 7/107:45 a.m. -
Nonstop6h 40m
Deal found 5/9C$ 452
Tue 27/105:45 p.m. -
1 stop10h 41m
Wed 28/1010:07 a.m. -
1 stop9h 40m
Deal found 6/9C$ 458
Thu 22/103:00 p.m. -
Nonstop5h 39m
Mon 26/108:51 p.m. -
Nonstop6h 33m
Deal found 6/9C$ 459
Sat 17/1012:45 p.m. -
1 stop8h 14m
Wed 21/109:20 a.m. -
Nonstop6h 23m
Deal found 5/9C$ 461

Find flight deals from San Francisco to Boston

Round-trip from

C$ 439

One-way from

C$ 226

Popular in

June

Cheapest in

January

Average price

C$ 578
Delta
  • Delta
  • 26/10-1/11
  • Nonstop
  • 12h 25m total
  • San Francisco to Boston
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Southwest
  • Southwest
  • 5/10-31/12
  • 1 total stop
  • 7h 45m total
  • San Francisco to Boston
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Highest demand for flights based on searches. 11% potential increase in price (C$ 102 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 14 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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Cheapflights Fare Finder

 
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
Quickest round-trip

San FranciscoBoston

SFO San Francisco - BOS Boston Logan Intl

SFOBOS

San Francisco

Wed 18/11

9:30 p.m.-6:06 a.m.

Nonstop5h 36m

Boston Logan Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 227

San FranciscoBoston

SFO San Francisco - BOS Boston Logan Intl

SFOBOS

San Francisco

Mon 26/10

7:00 a.m.-3:45 p.m.

Nonstop5h 45m

Boston Logan Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 234

San FranciscoBoston

SFO San Francisco - BOS Boston Logan Intl

SFOBOS

San Francisco

Wed 18/11

11:35 p.m.-12:00 p.m.

1 stop9h 25m

Boston Logan Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 234

San FranciscoBoston

SFO San Francisco - BOS Boston Logan Intl

SFOBOS

San Francisco

Mon 5/10

9:37 p.m.-6:30 a.m.

Nonstop5h 53m

Boston Logan Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 241

San FranciscoBoston

SFO San Francisco - BOS Boston Logan Intl

SFOBOS

San Francisco

Tue 22/9

6:00 a.m.-5:21 p.m.

1 stop8h 21m

Boston Logan Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 255

San FranciscoBoston

SFO San Francisco - BOS Boston Logan Intl

SFOBOS

San Francisco

Sun 27/9

10:35 p.m.-9:33 a.m.

1 stop7h 58m

Boston Logan Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 255

San FranciscoBoston

SFO San Francisco - BOS Boston Logan Intl

SFOBOS

San Francisco

Mon 28/9

3:00 p.m.-11:46 p.m.

Nonstop5h 46m

Boston Logan Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 275

San FranciscoBoston

SFO San Francisco - BOS Boston Logan Intl

SFOBOS

San Francisco

Mon 19/10

11:40 p.m.-12:30 p.m.

1 stop9h 50m

Boston Logan Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 275

San FranciscoBoston

SFO San Francisco - BOS Boston Logan Intl

SFOBOS

San Francisco

Tue 12/1

1:00 p.m.-9:44 p.m.

Nonstop5h 44m

Boston Logan Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 277

San FranciscoBoston

SFO San Francisco - BOS Boston Logan Intl

SFOBOS

San Francisco

Mon 28/9

12:30 p.m.-12:30 a.m.

1 stop9h 00m

Boston Logan Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 277

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 24 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

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?

Booking 70 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, January is the cheapest month in which you can book a flight from San Francisco to Boston (average of C$ 463). Flying from San Francisco to Boston in June is currently the most expensive (average of C$ 693). 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?

Unlike in the evening, when flights are generally more expensive, you can save up to 81% on flights from San Francisco to Boston by exploring options for tickets in the afternoon.

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

Airfare is below average for this route at the moment.

San Francisco to Boston flights typically cost between C$ 477 and C$ 740 in October.
The cheapest round-trip price found within the last 5 days was C$ 439 on Delta (26 Oct-1 Nov).

Related info for your journey

  • 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 40m. Delta provides one of the quickest options available for as low as C$ 459. 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 ITA Airways (100%), Scandinavian Airlines (89%) or EL AL (88%) 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, January is the cheapest month in which you can book a flight from San Francisco to Boston (average of C$ 463). Flying from San Francisco to Boston in June is currently the most expensive (average of C$ 693). 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
Old Orchard Beach
Cape Elizabeth
Hampton
Merrimack
Ogunquit
Saugus
Revere
Braintree
Milford
Waltham
Watertown
Warwick
Lawrence
Pawtucket
Seekonk
Foxborough
Nashua
Kittery

Browse thousands of different options on Cheapflights for your next trip

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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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