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Cheap flights from San Francisco to Boston from £110

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
18 May — 25 May1
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 72 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 18 April 2026.

Tue 18/816:24
SFO
-
BOS
1 stop10h 16m
Alaska Airlines
Thu 27/807:40
BOS
-
SFO
1 stop10h 05m
Alaska Airlines
Deal found 18/4£212
Tue 2/621:31
SFO
-
BOS
Nonstop5h 44m
JetBlue
Sat 6/614:40
BOS
-
SFO
Nonstop6h 40m
JetBlue
Deal found 16/4£219
Sat 23/506:00
SFO
-
BOS
Nonstop5h 41m
JetBlue
Sat 30/508:15
BOS
-
SFO
Nonstop6h 43m
JetBlue
Deal found 16/4£220
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£222
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£223
Wed 19/814:50
SFO
-
BOS
Nonstop5h 51m
Delta
Mon 24/820:55
BOS
-
SFO
Nonstop7h 01m
Delta
Deal found 13/4£227
Wed 26/814:50
SFO
-
BOS
Nonstop5h 51m
Delta
Wed 2/906:30
BOS
-
SFO
1 stop14h 20m
Delta
Deal found 13/4£229
Tue 9/623:05
SFO
-
BOS
Nonstop5h 56m
United Airlines
Tue 16/607:28
BOS
-
SFO
Nonstop6h 27m
United Airlines
Deal found 15/4£230
Tue 5/510:17
SFO
-
BOS
Nonstop5h 50m
United Airlines
Tue 12/507:35
BOS
-
SFO
Nonstop6h 45m
United Airlines
Deal found 14/4£231
Tue 2/616:44
SFO
-
BOS
1 stop10h 00m
Alaska Airlines
Wed 3/608:05
BOS
-
SFO
1 stop11h 56m
Alaska Airlines
Deal found 16/4£232
Mon 10/814:50
SFO
-
BOS
Nonstop5h 51m
Delta
Thu 13/807:00
BOS
-
SFO
Nonstop6h 57m
Delta
Deal found 15/4£234
Sat 15/820:58
SFO
-
BOS
Nonstop5h 52m
United Airlines
Sat 22/806:00
BOS
-
SFO
Nonstop6h 30m
United Airlines
Deal found 16/4£235

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 18 April 2026.

Round-trip from

£219

One-way from

£110

Popular in

December

Cheapest in

January

Average price

£330
JetBlue
  • JetBlue
  • 2/6-6/6
  • Nonstop
  • 12h 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, 1% potential price rise
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Cheapest flight prices on average. 1% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
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 18 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

Sat 30/5

06:16-05:44

1 stop20h 28m

Boston Logan Intl

Sat 6/6

08:05-17:01

1 stop11h 56m

£236
Fastest return journey

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 30/5

14:05-22:50

Nonstop5h 45m

Boston Logan Intl

Sat 6/6

08:15-11:58

Nonstop6h 43m

£238

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

£249

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

£281

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Thu 4/6

06:16-05:44

1 stop20h 28m

Boston Logan Intl

Sun 7/6

18:40-09:33

1 stop17h 53m

£299

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 26/5

00:50-12:57

1 stop9h 07m

Boston Logan Intl

Tue 16/6

07:28-10:55

Nonstop6h 27m

£308

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 20/6

07:00-15:54

Nonstop5h 54m

Boston Logan Intl

Sat 11/7

18:45-00:32

1 stop8h 47m

£308

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 24/8

19:45-09:30

2 stops10h 45m

Boston Logan Intl

Sat 29/8

07:05-14:45

2 stops10h 40m

£314

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 14/7

10:30-00:45

2 stops11h 15m

Boston Logan Intl

Wed 22/7

15:45-23:25

2 stops10h 40m

£314

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sun 3/5

06:20-17:04

1 stop7h 44m

Boston Logan Intl

Sat 4/7

07:20-10:59

Nonstop6h 39m

£319

Flights are sorted by cheapest return flights first.

Deals found on 17/4

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 10 April 2026.

Booking 72 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 £249). Flying from San Francisco to Boston in December is currently the most expensive (average of £345). 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 18 April 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 18 April 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
8,424 reviews
Check prices

Comfort

7.9

Food

7.2

Entertainment

7.8

Crew

8.5

Overall

7.9

Boarding

8.1

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
8,424 reviews
Delta
7.9
Good
8,424 reviews
Check prices

Comfort

7.9

Food

7.2

Entertainment

7.8

Crew

8.5

Overall

7.9

Boarding

8.1

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 33 flights from San Francisco to Logan Intl, all of which are around 5h 45m 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 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?

    Alaska Airlines, JetBlue, and United Airlines can get you from San Francisco to Boston in just under 5h 45m. Your travel time can differ by up to 14h 43m. 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 £87, 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 70% 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 £65 on Alaska Airlines. Other airlines that offer cheap prices include Delta from £73 and JetBlue from £88 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%), Etihad Airways (100%), Scandinavian Airlines( 98%).

  • 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 £249). Flying from San Francisco to Boston in December is currently the most expensive (average of £345). 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
Cambridge
Peabody
Somerville
Quincy
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.
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 18 April 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£87Average£456FlexibilityNo 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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