What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

What is the most punctual flight time for San Francisco to Boston flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

How often are flights from San Francisco to Boston delayed?

About 20% of weekly flights between San Francisco and Boston have experienced delays in the past year, with the average delay time being 177 minutes.

Which airline has the best punctuality record on San Francisco to Boston flights?

Over the past year, United Airlines have had the lowest number of delays on this route, with just 18% of flights being delayed.

How popular is this San Francisco to Boston flight route?

This flight path from San Francisco to Boston Logan Intl was viewed by 2 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, Delta, and Southwest can get you from San Francisco to Boston in just under 8h 19m. Your travel time can differ by up to 1h 14m. 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 £128, 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 61% less than the average price by searching for this airline.

Weekly flight availability from San Francisco to Boston

The most flights from SFO to BOS are scheduled on a Friday (46 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 on average).

In terms of precipitation, rainfall in Boston ranges from 78.0 - 101.0 inches per month. March is typically the wettest month, when rainfall can reach 101.0 mm. July is typically the driest time to visit Boston when rainfall is around 78.0 mm.

If weather is an important factor for your trip to Boston, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -1.0 C).

What are the cheapest flights from San Francisco to Boston?

The cheapest flight price from San Francisco to Boston is £218. On average you can expect to pay £278. The most popular route, (San Francisco - Boston Logan Intl), can usually be booked for £251.

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: Japan Airlines (83%), Scandinavian Airlines (82%), Etihad Airways( 81%).

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 31 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.

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.

£134+ Cheap Flights from San Francisco to Boston

Cheapflights Tip: The best prices from San Francisco to Boston Logan Intl are usually found in January or February, booked 71 days in advance, depart on a Monday or Tuesday and return on a Monday

Cheap flight deals from San Francisco to Boston

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

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 10 October 2026.

Mon 26/1005:35 -

1 stop7h 30m

Thu 29/1005:00 -

1 stop8h 15m

Deal found 7/10£252

Fri 6/1107:04 -

1 stop19h 42m

Mon 16/1118:09 -

1 stop17h 43m

Deal found 8/10£253

Wed 28/1010:40 -

1 stop15h 48m

Wed 4/1107:13 -

1 stop11h 48m

Deal found 7/10£254

Mon 2/1122:10 -

Nonstop5h 34m

Mon 9/1117:05 -

Nonstop6h 50m

Deal found 8/10£255

Mon 26/1017:45 -

1 stop10h 41m

Wed 6/118:14 -

1 stop17h 38m

Deal found 8/10£255

Tue 27/1006:55 -

2 stops11h 25m

Thu 29/1005:25 -

1 stop8h 25m

Deal found 8/10£256

Wed 2/1208:00 -

2 stops10h 55m

Fri 4/1215:30 -

2 stops11h 25m

Deal found 8/10£257

Mon 26/1017:45 -

1 stop10h 41m

Tue 27/1018:14 -

1 stop18h 23m

Deal found 7/10£258

Sat 31/1007:00 -

Nonstop5h 45m

Tue 5/117:35 -

Nonstop6h 55m

Deal found 9/10£258

Fri 30/1023:40 -

1 stop8h 55m

Tue 3/1105:30 -

1 stop11h 20m

Deal found 6/10£259

Sun 8/1106:00 -

1 stop10h 41m

Fri 13/1106:15 -

Nonstop6h 44m

Deal found 6/10£260

Sat 31/1009:43 -

1 stop11h 16m

Thu 7/118:14 -

1 stop17h 38m

Deal found 9/10£261

Find flight deals from San Francisco to Boston

Round-trip from	£252
One-way from	£134
Popular in	June
Cheapest in	January
Average price	£355
Good one-way deal	£222 or less

Southwest
26/10-29/10
2 total stops
15h 45m total
San Francisco to Boston

Search Deals

Alaska Airlines
1/12-31/12
1 total stop
29h 49m total
San Francisco to Boston

Search Deals

Highest demand for flights based on searches. 9% 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 October 2026

Search Deals

Price to beat on a one-way flight from San Francisco to Boston Logan Intl.

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Cheapflights Fare Finder

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 San Francisco - BOS Boston Logan Intl

SFOBOS

San Francisco

Tue 27/10

06:55-21:20

2 stops11h 25m

Boston Logan Intl

Wed 31/12

00:00-21:00

Nonstop0h 00m

£143

San FranciscoBoston

SFO San Francisco - BOS Boston Logan Intl

SFOBOS

San Francisco

Wed 21/10

07:00-15:45

Nonstop5h 45m

Boston Logan Intl

Wed 31/12

00:00-21:00

Nonstop0h 00m

£150

San FranciscoBoston

SFO San Francisco - BOS Boston Logan Intl

SFOBOS

San Francisco

Wed 7/4

16:06-05:47

1 stop10h 41m

Boston Logan Intl

Wed 31/12

00:00-21:00

Nonstop0h 00m

£151

San FranciscoBoston

SFO San Francisco - BOS Boston Logan Intl

SFOBOS

San Francisco

Sat 14/11

16:30-08:05

2 stops12h 35m

Boston Logan Intl

Wed 31/12

00:00-21:00

Nonstop0h 00m

£158

San FranciscoBoston

SFO San Francisco - BOS Boston Logan Intl

SFOBOS

San Francisco

Wed 21/10

17:50-08:10

2 stops11h 20m

Boston Logan Intl

Wed 31/12

00:00-21:00

Nonstop0h 00m

£162

San FranciscoBoston

SFO San Francisco - BOS Boston Logan Intl

SFOBOS

San Francisco

Fri 25/12

07:15-19:45

1 stop9h 30m

Boston Logan Intl

Wed 31/12

00:00-21:00

Nonstop0h 00m

£165

San FranciscoBoston

SFO San Francisco - BOS Boston Logan Intl

SFOBOS

San Francisco

Tue 9/2

19:00-08:05

2 stops10h 05m

Boston Logan Intl

Wed 31/12

00:00-21:00

Nonstop0h 00m

£169

San FranciscoBoston

SFO San Francisco - BOS Boston Logan Intl

SFOBOS

San Francisco

Wed 28/10

09:54-05:27

1 stop16h 33m

Boston Logan Intl

Wed 31/12

00:00-21:00

Nonstop0h 00m

£172

San FranciscoBoston

SFO San Francisco - BOS Boston Logan Intl

SFOBOS

San Francisco

Thu 26/11

06:00-14:31

Nonstop5h 31m

Boston Logan Intl

Wed 31/12

00:00-21:00

Nonstop0h 00m

£174

Fastest return journey

San FranciscoBoston

SFO San Francisco - BOS Boston Logan Intl

SFOBOS

San Francisco

Thu 19/11

15:05-23:35

Nonstop5h 30m

Boston Logan Intl

Wed 31/12

00:00-21:00

Nonstop0h 00m

£174

Flights are sorted by cheapest return flights first.

Deals found on 7/10

Showing 1-10 of 23 resultsSorted by cheapest first

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.

SFO-BOS

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

Prices

Airlines

Delays

How far ahead should I book a flight from San Francisco to Boston?

Booking 70 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 £254). Flying from San Francisco to Boston in June is currently the most expensive (average of £380). 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?

Unlike in the evening, when flights are generally more expensive, you can save up to 61% 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?

Airfare is below average for this route at the moment.

San Francisco to Boston flights typically cost between £273 and £451 in October.
The cheapest return price found within the last 5 days was £252 on Southwest (26 Oct–29 Oct).

Reviews of airlines servicing Boston

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

7.8

Good

8,654 reviews

Check prices

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

7.8

Good

8,654 reviews

Delta

7.8

Good

8,654 reviews

Check prices

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

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 31 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 2 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, Delta, and Southwest can get you from San Francisco to Boston in just under 8h 19m. Your travel time can differ by up to 1h 14m. 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 £128, 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 61% less than the average price by searching for this airline.
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: Japan Airlines (83%), Scandinavian Airlines (82%), Etihad Airways( 81%).
What are the cheapest flights from San Francisco to Boston?
The cheapest flight price from San Francisco to Boston is £218. On average you can expect to pay £278. The most popular route, (San Francisco - Boston Logan Intl), can usually be booked for £251.
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 £254). Flying from San Francisco to Boston in June is currently the most expensive (average of £380). 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

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Top airline flying from San Francisco to Boston

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest£128	Average£364	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights

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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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Cheap flights from San Francisco to Boston from £134

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from San Francisco to Boston

Cheapest flights from San Francisco to BostonExplore 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 10 October 2026.

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 10 October 2026.

Best flights from San Francisco to BostonDiscover carefully curated flight deals from San Francisco to Boston that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 10 October 2026.

Discover carefully curated flight deals from San Francisco to Boston that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 10 October 2026.

Direct flights from San Francisco to BostonExplore direct flight options from San Francisco to Boston based on user searches, and compare prices and availability for your desired travel dates. Data last updated 10 October 2026.

Explore direct flight options from San Francisco to Boston based on user searches, and compare prices and availability for your desired travel dates. Data last updated 10 October 2026.

Last-minute flights from San Francisco to BostonDiscover last-minute flight deals from San Francisco to Boston. Data last updated 10 October 2026 and is based on user searches.

Discover last-minute flight deals from San Francisco to Boston. Data last updated 10 October 2026 and is based on user searches.

One-way flights from San Francisco to BostonSearch for one-way flight options from San Francisco to Boston. Find affordable one-way fares based on user searches. Data last updated 10 October 2026.

Search for one-way flight options from San Francisco to Boston. Find affordable one-way fares based on user searches. Data last updated 10 October 2026.

Find flight deals from San Francisco to Boston

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One-way from

Popular in

Cheapest in

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Good one-way deal

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Francisco to Boston that are best for you.

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.

Cheapflights Insights

How far ahead should I book a flight from San Francisco to Boston?

Booking 70 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?

What is the cheapest time of day to fly from SFO to BOS?

Unlike in the evening, when flights are generally more expensive, you can save up to 61% 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?

Airfare is below average for this route at the moment.

San Francisco to Boston flights typically cost between £273 and £451 in October.The cheapest return price found within the last 5 days was £252 on Southwest (26 Oct–29 Oct).

Weekly flight availability from San Francisco to Boston

The most flights from SFO to BOS are scheduled on a Friday (46 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 on average).

How often are flights from San Francisco to Boston delayed?

About 20% of weekly flights between San Francisco and Boston have experienced delays in the past year, with the average delay time being 177 minutes.

What is the most punctual flight time for San Francisco to Boston flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on San Francisco to Boston flights?

Over the past year, United Airlines have had the lowest number of delays on this route, with just 18% of flights being delayed.

Reviews of airlines servicing Boston

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.

Related info for your journey

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

How popular is this San Francisco to Boston flight route?

How long is the flight from San Francisco to Boston?

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

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

What are the cheapest flights from San Francisco to Boston?

Can I find deals for flights from San Francisco to Boston that include hotel bookings?

How can I find direct flights from San Francisco to Boston?

Can I find deals for business class flights from San Francisco to Boston?

What is the cheapest month to book a flight from San Francisco to Boston?

Travelling to a place near Boston?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Francisco to Boston

See prices for flight routes from nearby airports that may be better suited for you.

Other flights to Boston

Explore flights to Boston departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 10 October 2026.

Complete your trip

Complete your trip to Boston by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to Massachusetts

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Search flights from San Francisco to Boston by cabin class

Find flights from San Francisco to Boston, based on your preferred cabin class, be it economy, premium economy, business, or first class.

San Francisco and Boston flights

Browse other San Francisco and Boston flight options. Last updated on 10 October 2026.

Other flights from San Francisco

Browse through other flights departing from San Francisco. Flights are based on user searches made on Cheapflights and were last updated on 10 October 2026.

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Top airline flying from San Francisco to Boston

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How does Cheapflights help users find flights from San Francisco to Boston?

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

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

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 10 October 2026.

Best flights from San Francisco to Boston
Discover carefully curated flight deals from San Francisco to Boston that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 10 October 2026.

Direct flights from San Francisco to Boston
Explore direct flight options from San Francisco to Boston based on user searches, and compare prices and availability for your desired travel dates. Data last updated 10 October 2026.

Last-minute flights from San Francisco to Boston
Discover last-minute flight deals from San Francisco to Boston. Data last updated 10 October 2026 and is based on user searches.

One-way flights from San Francisco to Boston
Search for one-way flight options from San Francisco to Boston. Find affordable one-way fares based on user searches. Data last updated 10 October 2026.

San Francisco to Boston flights typically cost between £273 and £451 in October.
The cheapest return price found within the last 5 days was £252 on Southwest (26 Oct–29 Oct).