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Cheap flights from San Francisco to Boston from $204

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 7/7. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BOS
20 Apr — 27 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 21 March 2026.

Wed 10/614:50
SFO
-
BOS
Nonstop5h 51m
Delta
Tue 16/607:00
BOS
-
SFO
Nonstop6h 57m
Delta
Deal found 16/3$407
Mon 18/521:54
SFO
-
BOS
Nonstop5h 51m
Delta
Tue 11/820:55
BOS
-
SFO
Nonstop7h 01m
Delta
Deal found 16/3$414
Mon 4/517:31
SFO
-
BOS
1 stop10h 41m
Multiple Airlines
Mon 11/512:01
BOS
-
SFO
1 stop10h 33m
Multiple Airlines
Deal found 19/3$418
Tue 28/422:30
SFO
-
BOS
Nonstop5h 55m
Delta
Sat 2/507:40
BOS
-
SFO
Nonstop6h 49m
Delta
Deal found 16/3$421
Tue 14/722:00
SFO
-
BOS
Nonstop5h 54m
Delta
Wed 29/707:00
BOS
-
SFO
Nonstop6h 57m
Delta
Deal found 17/3$435
Tue 5/509:00
SFO
-
BOS
1 stop11h 59m
Multiple Airlines
Tue 12/509:18
BOS
-
SFO
1 stop13h 16m
Multiple Airlines
Deal found 21/3$438
Mon 4/515:10
SFO
-
BOS
Nonstop5h 48m
JetBlue
Mon 11/520:19
BOS
-
SFO
Nonstop6h 40m
JetBlue
Deal found 19/3$439
Wed 8/408:00
SFO
-
BOS
1 stop18h 53m
Alaska Airlines
Wed 6/507:00
BOS
-
SFO
2 stops17h 20m
Alaska Airlines
Deal found 17/3$441
Wed 27/521:54
SFO
-
BOS
Nonstop5h 51m
Delta
Thu 13/807:00
BOS
-
SFO
Nonstop6h 57m
Delta
Deal found 16/3$442
Sat 2/514:10
SFO
-
BOS
Nonstop5h 41m
Multiple Airlines
Sat 9/512:01
BOS
-
SFO
1 stop10h 33m
Multiple Airlines
Deal found 18/3$445
Fri 1/522:30
SFO
-
BOS
Nonstop5h 55m
Delta
Sun 10/520:59
BOS
-
SFO
Nonstop6h 33m
Delta
Deal found 16/3$449

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 21 March 2026.

Round-trip from

$407

One-way from

$204

Popular in

December

Cheapest in

January

Average price

$584

Good round-trip deal

$376 or less

Good one-way deal

$203 or less
Delta
  • Delta
  • 10/6-16/6
  • Nonstop
  • 12h 48m total
  • San Francisco to Boston
Search Deals
Delta
  • Delta
  • 7/7
  • Nonstop
  • 5h 54m total
  • San Francisco to Boston
Search Deals
High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($15 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
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Price to beat on a round-trip flight from San Francisco to Boston Logan Intl.
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Price to beat on a one-way flight from San Francisco to Boston Logan Intl.
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Cheapflights Fare Finder

 
Customise 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 647,157 searches. Data last updated 21 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 return flight

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 15/4

22:30-07:25

Nonstop5h 55m

Boston Logan Intl

Sat 2/5

19:00-22:45

Nonstop6h 45m

$449
Fastest return journey

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 13/4

22:30-07:25

Nonstop5h 55m

Boston Logan Intl

Wed 22/4

20:45-00:27

Nonstop6h 42m

$449

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 13/4

19:15-08:15

2 stops10h 00m

Boston Logan Intl

Wed 22/4

05:45-11:00

1 stop8h 15m

$456

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 4/5

22:50-10:38

1 stop8h 48m

Boston Logan Intl

Fri 8/5

20:19-23:59

Nonstop6h 40m

$482

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 4/5

22:50-10:38

1 stop8h 48m

Boston Logan Intl

Mon 11/5

20:19-23:59

Nonstop6h 40m

$482

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 13/4

22:00-06:40

Nonstop5h 40m

Boston Logan Intl

Wed 22/4

11:40-19:22

1 stop10h 42m

$482

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 5/5

06:55-15:40

Nonstop5h 45m

Boston Logan Intl

Tue 12/5

15:00-23:56

1 stop11h 56m

$482

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 2/5

21:15-08:30

1 stop8h 15m

Boston Logan Intl

Sat 9/5

13:50-21:55

2 stops11h 05m

$484

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 4/5

21:15-08:15

1 stop8h 00m

Boston Logan Intl

Mon 11/5

15:45-23:45

2 stops11h 00m

$484

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 5/5

05:25-18:35

1 stop10h 10m

Boston Logan Intl

Tue 12/5

14:25-23:15

2 stops11h 50m

$484

Flights are sorted by cheapest return flights first.

Deals found on 18/3

Showing 1-10 of 22 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 return 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 return flight from San Francisco to Boston. Price data was last updated on 13 March 2026.

The best time to book flights from San Francisco to Boston is 69 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 $167). Flying from San Francisco to Boston in January is currently the most expensive (average of $268). 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 21 March 2026.

When flying from San Francisco to Boston, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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?

    The San Francisco to Boston Logan Intl flight path was viewed by 6 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    Airlines like Delta, Southwest, and JetBlue fly from San Francisco to Boston in about 5h 55m. The time it takes to get you to your destination can typically vary by up to 4h 05m. Airlines will cover a distance of 4339 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    No one likes to see their flight delayed. When booking a flight from San Francisco to Boston consider choosing EL AL(89%), LATAM Airlines(87%) or Scandinavian Airlines(87%), as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from San Francisco to Boston?

    The cheapest flight price from San Francisco to Boston is $203. On average you can expect to pay $321. The most popular route, (San Francisco - Boston Logan Intl), can usually be booked for $449.

  • 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 holiday 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 $167). Flying from San Francisco to Boston in January is currently the most expensive (average of $268). 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
Revere
Cambridge

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Francisco to Boston

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Boston flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from San Francisco to Boston?

When you search for this flight from San Francisco to Boston, 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 San Francisco to Boston?

Millions of users choose and trust Cheapflights to book the best flight deals from San Francisco to Boston for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Certainly. Search results for flights to Boston from San Francisco shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from San Francisco to Boston become cheaper?

Yes, Cheapflights offers price alerts on San Francisco to Boston flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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