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Cheap flights from San Francisco to Boston from £122

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 3/7. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BOS
1 Jul — 8 Jul1
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 Tuesday

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 1 June 2026.

Wed 8/707:55
SFO
-
BOS
1 stop18h 45m
Alaska Airlines
Wed 15/716:33
BOS
-
SFO
1 stop9h 35m
Alaska Airlines
Deal found 27/5£236
Wed 8/706:00
SFO
-
BOS
Nonstop5h 41m
JetBlue
Wed 15/720:55
BOS
-
SFO
Nonstop6h 35m
JetBlue
Deal found 29/5£238
Wed 8/707:10
SFO
-
BOS
Nonstop5h 45m
Delta
Mon 13/720:55
BOS
-
SFO
Nonstop6h 38m
Delta
Deal found 28/5£239
Thu 9/715:18
SFO
-
BOS
Nonstop5h 41m
JetBlue
Wed 15/719:05
BOS
-
SFO
Nonstop6h 41m
JetBlue
Deal found 31/5£241
Tue 7/700:48
SFO
-
BOS
1 stop8h 15m
American Airlines
Wed 15/706:05
BOS
-
SFO
1 stop9h 14m
American Airlines
Deal found 29/5£242
Wed 5/811:15
SFO
-
BOS
1 stop10h 10m
Southwest
Tue 11/808:30
BOS
-
SFO
1 stop10h 55m
Southwest
Deal found 30/5£243
Sat 22/811:35
SFO
-
BOS
1 stop9h 50m
Southwest
Sat 29/812:10
BOS
-
SFO
2 stops11h 25m
Southwest
Deal found 28/5£244
Tue 18/815:00
SFO
-
BOS
Nonstop5h 41m
Delta
Fri 28/820:35
BOS
-
SFO
1 stop14h 46m
Delta
Deal found 29/5£244
Tue 16/616:15
SFO
-
BOS
Nonstop5h 56m
United Airlines
Wed 24/618:10
BOS
-
SFO
Nonstop6h 37m
United Airlines
Deal found 27/5£245
Mon 13/721:25
SFO
-
BOS
Nonstop5h 56m
United Airlines
Tue 21/706:00
BOS
-
SFO
1 stop8h 38m
United Airlines
Deal found 28/5£247
Tue 7/710:50
SFO
-
BOS
1 stop9h 30m
Southwest
Wed 12/810:50
BOS
-
SFO
2 stops11h 15m
Southwest
Deal found 29/5£247
Tue 14/716:15
SFO
-
BOS
Nonstop5h 56m
United Airlines
Wed 15/706:00
BOS
-
SFO
1 stop8h 38m
United Airlines
Deal found 31/5£248

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 1 June 2026.

Round-trip from

£236

One-way from

£122

Popular in

June

Cheapest in

January

Average price

£354

Good one-way deal

£173 or less
Alaska Airlines
  • Alaska Airlines
  • 8/7-15/7
  • 2 total stops
  • 28h 20m total
  • San Francisco to Boston
Search Deals
United Airlines
  • United Airlines
  • 3/7
  • 1 total stop
  • 9h 07m total
  • San Francisco to Boston
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£26 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 858,174 searches. Data last updated 1 June 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 9/7

07:10-15:55

Nonstop5h 45m

Boston Logan Intl

Mon 13/7

20:55-00:33

Nonstop6h 38m

£250

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 8/7

15:00-23:41

Nonstop5h 41m

Boston Logan Intl

Wed 15/7

07:20-10:51

Nonstop6h 31m

£269

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 28/8

15:00-23:41

Nonstop5h 41m

Boston Logan Intl

Sat 29/8

17:05-20:51

Nonstop6h 46m

£269

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 8/7

22:50-12:10

2 stops10h 20m

Boston Logan Intl

Wed 15/7

16:25-22:35

1 stop9h 10m

£279

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 12/8

23:05-14:55

2 stops12h 50m

Boston Logan Intl

Sat 15/8

05:00-15:50

1 stop13h 50m

£283

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Thu 20/8

05:35-18:00

1 stop9h 25m

Boston Logan Intl

Sun 23/8

05:55-13:10

1 stop10h 15m

£286

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 14/8

10:50-00:25

1 stop10h 35m

Boston Logan Intl

Sat 19/9

07:05-14:45

2 stops10h 40m

£290

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 11/8

07:00-15:45

Nonstop5h 45m

Boston Logan Intl

Wed 19/8

07:35-11:09

Nonstop6h 34m

£292

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 3/8

21:48-06:30

Nonstop5h 42m

Boston Logan Intl

Sun 22/11

16:55-20:50

Nonstop6h 55m

£292
Fastest return journey

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sun 19/7

23:58-08:40

Nonstop5h 42m

Boston Logan Intl

Wed 29/7

06:35-10:05

Nonstop6h 30m

£298

Flights are sorted by cheapest return flights first.

Deals found on 27/5

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?

Booking 90 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 £250). Flying from San Francisco to Boston in June is currently the most expensive (average of £354). 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 1 June 2026.

Unlike in the evening, when flights are generally more expensive, you can save up to 62% on flights from San Francisco to Boston by exploring options for tickets at midday.

How much does it cost for a return flight from San Francisco to Boston?

Reviews of airlines servicing Boston

Get insights into the airlines that provide service to Boston. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boston. Reviews last updated 1 June 2026.
Read through reviews of airlines operating flights from San Francisco to Boston, such as Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,402 reviews
Check prices

Comfort

7.8

Boarding

8.1

Food

7.2

Overall

7.9

Entertainment

7.8

Crew

8.5

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
Delta
7.9
Good
8,402 reviews
Delta
7.9
Good
8,402 reviews
Check prices

Comfort

7.8

Boarding

8.1

Food

7.2

Overall

7.9

Entertainment

7.8

Crew

8.5

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good

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.

  • What airports do I use to fly from San Francisco to Boston?

    Booking a flight from San Francisco (SFO) to Boston Logan Intl (BOS) is your only option if you wish to fly from San Francisco to Boston. On a typical day, there are 43 flights from San Francisco to Logan Intl, all of which are around 5h 41m for a nonstop flight. You can also purchase a plane ticket from 1 airline when you book a flight from San Francisco to Boston.

  • How popular is this San Francisco to Boston flight route?

    This flight path from San Francisco to Boston Logan Intl was viewed by 3 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?

    Delta and Southwest can get you from San Francisco to Boston in just under 5h 45m. Your travel time can differ by up to 4h 35m. There are 2696 mi between San Francisco and Boston. Both multi-stop and direct flights can be found to your destination and back.

  • What is the cheapest airline to fly from San Francisco to Boston round-trip?

    Currently priced at £88, Delta will fly you from San Francisco to Boston and back. In addition to Delta, many other airlines offer competitively priced options for your trip. You may be able to fly from San Francisco to Boston for 71% less than the average price by searching for this airline.

  • 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 £73 on Delta. Other airlines that offer cheap prices include JetBlue from £88 and United Airlines from £141 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 (100%), Scandinavian Airlines (98%), Air New Zealand( 83%).

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

    The cheapest flight price from San Francisco to Boston is £166. On average you can expect to pay £310. The most popular route, (San Francisco - Boston Logan Intl), can usually be booked for £265.

  • 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 £250). Flying from San Francisco to Boston in June is currently the most expensive (average of £354). 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
Waltham
Warwick
North Truro
Cambridge
Peabody
Somerville
Quincy
Chelmsford
Wellfleet

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
San Diego to Boston flights

Top airline flying from San Francisco to Boston

Discover the top airline that operate flights from San Francisco to Boston. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 1 June 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£88Average£418FlexibilityNo cancel feeOn-timeN/A
Search Delta 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?

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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