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Cheap flights from San Francisco to Boston from £96

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 17/3. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BOS
30 Mar — 6 Apr1
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 September, booked 64 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

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 28 February 2026.

Wed 29/410:25
SFO
-
BOS
1 stop10h 34m
Alaska Airlines
Tue 5/507:00
BOS
-
SFO
1 stop10h 21m
Alaska Airlines
Deal found 24/2£168
Tue 31/320:15
SFO
-
BOS
Nonstop5h 42m
JetBlue
Wed 1/407:15
BOS
-
SFO
Nonstop6h 45m
JetBlue
Deal found 25/2£172
Tue 17/307:25
SFO
-
BOS
Nonstop5h 32m
Delta
Wed 25/307:40
BOS
-
SFO
Nonstop6h 58m
Delta
Deal found 24/2£176
Wed 25/306:00
SFO
-
BOS
1 stop14h 59m
Delta
Tue 31/317:20
BOS
-
SFO
Nonstop6h 53m
Delta
Deal found 25/2£178
Wed 15/405:25
SFO
-
BOS
1 stop10h 10m
Southwest
Tue 28/405:45
BOS
-
SFO
1 stop8h 15m
Southwest
Deal found 24/2£179
Wed 1/421:16
SFO
-
BOS
Nonstop6h 05m
United Airlines
Tue 7/418:01
BOS
-
SFO
Nonstop6h 49m
United Airlines
Deal found 24/2£180
Wed 29/405:59
SFO
-
BOS
1 stop15h 00m
Delta
Wed 6/507:37
BOS
-
SFO
1 stop11h 22m
Delta
Deal found 25/2£180
Wed 29/405:59
SFO
-
BOS
1 stop15h 00m
Delta
Sat 2/507:40
BOS
-
SFO
Nonstop6h 49m
Delta
Deal found 25/2£182
Tue 28/422:30
SFO
-
BOS
Nonstop5h 55m
Delta
Wed 20/520:59
BOS
-
SFO
Nonstop6h 33m
Delta
Deal found 24/2£183
Tue 19/506:16
SFO
-
BOS
1 stop20h 28m
Alaska Airlines
Tue 2/606:00
BOS
-
SFO
1 stop9h 41m
Alaska Airlines
Deal found 24/2£184
Tue 17/311:34
SFO
-
BOS
1 stop9h 25m
Alaska Airlines
Tue 31/307:15
BOS
-
SFO
1 stop30h 16m
Alaska Airlines
Deal found 24/2£185
Wed 11/313:00
SFO
-
BOS
Nonstop5h 39m
Delta
Tue 31/317:20
BOS
-
SFO
Nonstop6h 53m
Delta
Deal found 24/2£187

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 28 February 2026.

Round-trip from

£168

One-way from

£96

Popular in

December

Cheapest in

January

Average price

£280
Alaska Airlines
  • Alaska Airlines
  • 29/4-5/5
  • 2 total stops
  • 20h 55m total
  • San Francisco to Boston
Search Deals
United Airlines
  • United Airlines
  • 17/3
  • 1 total stop
  • 7h 50m total
  • San Francisco to Boston
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (£1 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£5 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
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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 858,174 searches. Data last updated 28 February 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

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 8/5

14:10-00:59

1 stop7h 49m

Boston Logan Intl

Sun 10/5

20:15-23:58

Nonstop6h 43m

£198

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 12/5

19:15-08:15

2 stops10h 00m

Boston Logan Intl

Wed 13/5

18:20-23:35

1 stop8h 15m

£202

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 16/3

20:44-05:15

Nonstop5h 31m

Boston Logan Intl

Thu 19/3

07:10-11:10

Nonstop7h 00m

£219

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 1/7

12:20-21:11

Nonstop5h 51m

Boston Logan Intl

Wed 8/7

20:55-00:56

Nonstop7h 01m

£225

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 26/5

06:00-18:11

1 stop9h 11m

Boston Logan Intl

Thu 4/6

08:05-18:01

1 stop12h 56m

£234

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 16/6

14:50-23:41

Nonstop5h 51m

Boston Logan Intl

Wed 24/6

20:55-00:56

Nonstop7h 01m

£234

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 10/7

14:50-23:41

Nonstop5h 51m

Boston Logan Intl

Sat 18/7

07:00-10:57

Nonstop6h 57m

£252

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 9/6

13:05-00:23

1 stop8h 18m

Boston Logan Intl

Mon 29/6

20:55-00:56

Nonstop7h 01m

£278

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 12/6

22:00-06:54

Nonstop5h 54m

Boston Logan Intl

Sat 20/6

07:00-10:57

Nonstop6h 57m

£280

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 17/4

12:35-23:59

1 stop8h 24m

Boston Logan Intl

Mon 20/4

18:01-21:50

Nonstop6h 49m

£284

Flights are sorted by cheapest return flights first.

Deals found on 26/2

Showing 1-10 of 23 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 20 February 2026.

Booking 64 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 £88). Flying from San Francisco to Boston in January is currently the most expensive (average of £140). 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 28 February 2026.

Unlike in the evening, when flights are generally more expensive, you can save up to 86% on flights from San Francisco to Boston by exploring options for tickets at midday.

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?

    This flight path from San Francisco to Boston Logan Intl was viewed by 7 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?

    United Airlines, Southwest, and JetBlue can get you from San Francisco to Boston in just under 5h 31m. Your travel time can differ by up to 4h 29m. There are 2696 mi between San Francisco and Boston. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines to fly from San Francisco to Boston one-way?

    One-way options have recently been found by users for as low as £65 on Alaska Airlines. Other airlines that offer cheap prices include Delta from £73 and JetBlue from £84 one-way.

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

    Before booking your flight to Boston from San Francisco, check out the most reliable airlines to get you to your destination on time: EL AL (89%), United Airlines (88%), Qatar Airways( 88%).

  • 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 £88). Flying from San Francisco to Boston in January is currently the most expensive (average of £140). 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
Burlington
Canton
Warwick
Cambridge
Peabody
Somerville
Quincy
Waltham
Chelmsford

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.
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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?

Cheapflights helps you search for flights from San Francisco to Boston via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights simply makes it quick and affordable to book flights from San Francisco to Boston by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Need flexible booking options for your flight to Boston from San Francisco? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

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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