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Cheap flights from San Francisco to Boston from $178

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 4/3. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BOS
5 Mar — 12 Mar1
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 3 February 2026.

Tue 10/313:00
SFO
-
BOS
Nonstop5h 39m
Delta
Tue 17/317:20
BOS
-
SFO
Nonstop6h 53m
Delta
Deal found 1/2$305
Tue 10/316:21
SFO
-
BOS
1 stop11h 33m
Alaska Airlines
Wed 11/309:02
BOS
-
SFO
1 stop9h 46m
Alaska Airlines
Deal found 2/2$318
Tue 3/323:59
SFO
-
BOS
1 stop7h 51m
United Airlines
Mon 9/305:45
BOS
-
SFO
Nonstop6h 58m
United Airlines
Deal found 31/1$319
Tue 10/307:25
SFO
-
BOS
Nonstop5h 32m
Delta
Wed 11/307:40
BOS
-
SFO
Nonstop6h 58m
Delta
Deal found 2/2$327
Fri 6/313:00
SFO
-
BOS
Nonstop5h 35m
Delta
Mon 9/317:20
BOS
-
SFO
Nonstop6h 53m
Delta
Deal found 1/2$334
Tue 24/208:25
SFO
-
BOS
Nonstop5h 37m
United Airlines
Sat 28/206:00
BOS
-
SFO
1 stop9h 15m
United Airlines
Deal found 31/1$335
Tue 24/207:10
SFO
-
BOS
Nonstop5h 39m
Delta
Tue 3/305:50
BOS
-
SFO
1 stop10h 58m
Delta
Deal found 1/2$338
Tue 19/521:54
SFO
-
BOS
Nonstop5h 51m
Delta
Wed 27/516:59
BOS
-
SFO
Nonstop6h 37m
Delta
Deal found 3/2$341
Tue 17/207:10
SFO
-
BOS
Nonstop5h 39m
Delta
Tue 24/217:35
BOS
-
SFO
Nonstop7h 00m
Delta
Deal found 3/2$348
Thu 19/207:10
SFO
-
BOS
Nonstop5h 39m
Delta
Wed 25/217:35
BOS
-
SFO
Nonstop7h 00m
Delta
Deal found 3/2$355

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 3 February 2026.

Round-trip from

$305

One-way from

$186

Popular in

December

Cheapest in

February

Average price

$463

Good one-way deal

$182 or less
Delta
  • Delta
  • 10/3-17/3
  • Nonstop
  • 12h 32m total
  • San Francisco to Boston
Search Deals
United Airlines
  • United Airlines
  • 17/2
  • Nonstop
  • 5h 41m total
  • San Francisco to Boston
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($18 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a one-way 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 3 February 2026.
Use the filters below to find and compare flights from San Francisco to Boston that are best for you.

Fly from

San Francisco

Fly to

Boston

Route

Depart

Return

Price

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 10/3

13:00-21:39

Nonstop5h 39m

Boston Logan Intl

Tue 17/3

17:20-21:13

Nonstop6h 53m

$305

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 3/3

23:59-10:50

1 stop7h 51m

Boston Logan Intl

Thu 5/3

05:45-09:43

Nonstop6h 58m

$319

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 3/3

10:35-21:51

1 stop8h 16m

Boston Logan Intl

Tue 10/3

07:55-11:55

Nonstop7h 00m

$341

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 23/2

23:59-10:50

1 stop7h 51m

Boston Logan Intl

Wed 25/2

17:50-21:50

Nonstop7h 00m

$370

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sun 15/2

07:10-15:49

Nonstop5h 39m

Boston Logan Intl

Thu 19/2

17:35-21:35

Nonstop7h 00m

$377

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Thu 28/5

22:45-09:39

1 stop7h 54m

Boston Logan Intl

Wed 3/6

16:15-19:49

Nonstop6h 34m

$377

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 9/5

21:30-06:08

Nonstop5h 38m

Boston Logan Intl

Fri 15/5

21:10-00:54

Nonstop6h 44m

$381

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sun 10/5

21:54-06:45

Nonstop5h 51m

Boston Logan Intl

Wed 20/5

20:50-00:23

Nonstop6h 33m

$381

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Thu 30/4

07:05-15:39

Nonstop5h 34m

Boston Logan Intl

Mon 4/5

20:45-00:27

Nonstop6h 42m

$384

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Thu 19/2

16:10-00:49

Nonstop5h 39m

Boston Logan Intl

Fri 20/2

12:05-18:16

1 stop9h 11m

$399

Flights are sorted by cheapest return flights first.

Deals found on 31/1

Showing 1-10 of 24 results
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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 30 January 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 $170). Flying from San Francisco to Boston in June is currently the most expensive (average of $295). 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 3 February 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 5 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 United Airlines, Delta, and JetBlue fly from San Francisco to Boston in about 5h 38m. The time it takes to get you to your destination can typically vary by up to 2h 13m. 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 Virgin Atlantic(89%), EL AL(88%) 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 $179. On average you can expect to pay $222. The most popular route, (San Francisco - Boston Logan Intl), can usually be booked for $967.

  • 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 $170). Flying from San Francisco to Boston in June is currently the most expensive (average of $295). 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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