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Cheap flights from San Francisco to Boston from $208

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 18/8. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BOS
17 May — 24 May1
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 17 April 2026.

Tue 2/621:31
SFO
-
BOS
Nonstop5h 44m
JetBlue
Sat 6/614:40
BOS
-
SFO
Nonstop6h 40m
JetBlue
Deal found 16/4$414
Sat 23/506:00
SFO
-
BOS
Nonstop5h 41m
JetBlue
Sat 30/508:15
BOS
-
SFO
Nonstop6h 43m
JetBlue
Deal found 16/4$415
Tue 14/716:24
SFO
-
BOS
1 stop10h 16m
Alaska Airlines
Wed 15/708:28
BOS
-
SFO
1 stop9h 46m
Alaska Airlines
Deal found 13/4$420
Mon 1/618:58
SFO
-
BOS
1 stop8h 22m
Alaska Airlines
Tue 9/608:05
BOS
-
SFO
1 stop11h 56m
Alaska Airlines
Deal found 17/4$421
Tue 2/623:59
SFO
-
BOS
Nonstop5h 41m
JetBlue
Fri 19/620:55
BOS
-
SFO
Nonstop6h 36m
JetBlue
Deal found 17/4$428
Wed 26/814:50
SFO
-
BOS
Nonstop5h 51m
Delta
Wed 2/906:30
BOS
-
SFO
1 stop14h 20m
Delta
Deal found 13/4$432
Tue 9/623:05
SFO
-
BOS
Nonstop5h 56m
United Airlines
Tue 16/607:28
BOS
-
SFO
Nonstop6h 27m
United Airlines
Deal found 15/4$434
Tue 5/510:17
SFO
-
BOS
Nonstop5h 50m
United Airlines
Tue 12/507:35
BOS
-
SFO
Nonstop6h 45m
United Airlines
Deal found 14/4$436
Tue 2/616:44
SFO
-
BOS
1 stop10h 00m
Alaska Airlines
Wed 3/608:05
BOS
-
SFO
1 stop11h 56m
Alaska Airlines
Deal found 17/4$438
Sun 9/815:00
SFO
-
BOS
Nonstop5h 41m
Delta
Fri 14/820:55
BOS
-
SFO
Nonstop7h 01m
Delta
Deal found 15/4$442
Sat 15/820:58
SFO
-
BOS
Nonstop5h 52m
United Airlines
Sat 22/806:00
BOS
-
SFO
Nonstop6h 30m
United Airlines
Deal found 16/4$443
Sat 30/518:58
SFO
-
BOS
1 stop8h 22m
Alaska Airlines
Tue 9/608:05
BOS
-
SFO
1 stop11h 56m
Alaska Airlines
Deal found 17/4$446

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 17 April 2026.

Round-trip from

$386

One-way from

$208

Popular in

December

Cheapest in

January

Average price

$623

Good round-trip deal

$370 or less
Alaska Airlines
  • Alaska Airlines
  • 27/5-3/6
  • 2 total stops
  • 32h 24m total
  • San Francisco to Boston
Search Deals
Delta
  • Delta
  • 18/8
  • Nonstop
  • 5h 51m total
  • San Francisco to Boston
Search Deals
High demand for flights, 2% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($13 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from San Francisco to Boston Logan Intl.
Search Deals

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 17 April 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

Thu 28/5

06:16-05:44

1 stop20h 28m

Boston Logan Intl

Thu 4/6

08:05-15:01

1 stop9h 56m

$456

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 11/7

22:38-09:39

1 stop8h 01m

Boston Logan Intl

Fri 17/7

06:00-09:27

Nonstop6h 27m

$470

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Thu 28/5

15:10-23:58

Nonstop5h 48m

Boston Logan Intl

Thu 4/6

19:07-22:49

Nonstop6h 42m

$484

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 6/5

07:15-07:12

2 stops20h 57m

Boston Logan Intl

Thu 4/6

08:05-15:01

1 stop9h 56m

$488

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 20/6

06:00-23:00

1 stop14h 00m

Boston Logan Intl

Tue 30/6

05:50-10:30

1 stop7h 40m

$526

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 3/6

13:35-07:33

1 stop14h 58m

Boston Logan Intl

Thu 25/6

20:50-00:33

Nonstop6h 43m

$530
Fastest return journey

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 22/5

16:15-01:11

Nonstop5h 56m

Boston Logan Intl

Sat 30/5

06:00-09:27

Nonstop6h 27m

$563

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 21/8

19:45-09:55

2 stops11h 10m

Boston Logan Intl

Mon 24/8

07:40-13:00

1 stop8h 20m

$567

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 25/9

12:20-21:11

Nonstop5h 51m

Boston Logan Intl

Tue 29/9

06:35-17:26

1 stop13h 51m

$567

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 12/5

21:25-06:27

Nonstop6h 02m

Boston Logan Intl

Tue 19/5

07:21-13:15

1 stop8h 54m

$581

Flights are sorted by cheapest return flights first.

Deals found on 13/4

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 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 10 April 2026.

The best time to book flights from San Francisco to Boston is 72 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, January is the cheapest month in which you can book a flight from San Francisco to Boston (average of $470). Flying from San Francisco to Boston in December is currently the most expensive (average of $651). 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 17 April 2026.

It’s optimal to fly from San Francisco to Boston in the evening. By choosing this option you can save up to 46% on the cost of your flight, compared to a flight in the afternoon.

How much does it cost for a return flight 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?

    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 Alaska Airlines, United Airlines, and JetBlue fly from San Francisco to Boston in about 5h 48m. The time it takes to get you to your destination can typically vary by up to 3h 15m. 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(100%), Etihad Airways(100%) or Scandinavian Airlines(98%), 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 $370. On average you can expect to pay $370. The most popular route, (San Francisco - Boston Logan Intl), can usually be booked for $671.

  • 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, January is the cheapest month in which you can book a flight from San Francisco to Boston (average of $470). Flying from San Francisco to Boston in December is currently the most expensive (average of $651). 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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