Q: 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 £277 and £442 in September. The cheapest return price found within the last 5 days was £220 on United Airlines (12 Sept–22 Sept).

Question 1

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

Accepted Answer

Over the past year, Alaska Airlines have had the lowest number of delays on this route, with just 14% of flights being delayed.

Question 2

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

Accepted Answer

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.

Question 3

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

Accepted Answer

Airfare is below average for this route at the moment.San Francisco to Boston flights typically cost between £277 and £442 in September.
The cheapest return price found within the last 5 days was £220 on United Airlines (12 Sept–22 Sept).

Question 4

How often are flights from San Francisco to Boston delayed?

Accepted Answer

About 17% of weekly flights between San Francisco and Boston have experienced delays in the past year, with the average delay time being 173 minutes.

Question 5

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

Accepted Answer

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.

Question 6

How popular is this San Francisco to Boston flight route?

Accepted Answer

This flight path from San Francisco to Boston Logan Intl was viewed by 4 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

Question 7

How long is the flight from San Francisco to Boston?

Accepted Answer

JetBlue, Delta, and Southwest can get you from San Francisco to Boston in just under 5h 41m. Your travel time can differ by up to 4h 09m. There are 2696 mi between San Francisco and Boston. Both multi-stop and direct flights can be found to your destination and back.

Question 8

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

Accepted Answer

Currently priced at £95, 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 69% less than the average price by searching for this airline.

Question 9

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

Accepted Answer

One-way options have recently been found by users for as low as £87 on Delta. Other airlines that offer cheap prices include JetBlue from £88 and United Airlines from £136 one-way.

Question 10

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

Accepted Answer

Booking 71 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.

Question 11

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

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from San Francisco to Boston (average of £247). Flying from San Francisco to Boston in June is currently the most expensive (average of £371). 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.

Question 12

Weekly flight availability from San Francisco to Boston

Accepted Answer

The most flights from SFO to BOS are scheduled on a Thursday (53 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (33 on average).

Question 13

E

Accepted Answer

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.

Question 14

E

Accepted Answer

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).

Question 15

What are the cheapest flights from San Francisco to Boston?

Accepted Answer

The cheapest flight price from San Francisco to Boston is £90. On average you can expect to pay £205. The most popular route, (San Francisco - Boston Logan Intl), can usually be booked for £223.

Question 16

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

Accepted Answer

Before booking your flight to Boston from San Francisco, check out the most reliable airlines to get you to your destination on time: ITA Airways (100%), Scandinavian Airlines (87%), Virgin Australia( 83%).

Question 17

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

Accepted Answer

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.

Question 18

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

Accepted Answer

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.

Question 19

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

Accepted Answer

Yes. In addition to deals on San Francisco to Boston flights, Cheapflights offers holiday packages that include both flights and hotel.

Question 20

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

Accepted Answer

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.

Question 21

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

Accepted Answer

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.

Question 22

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

Accepted Answer

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.

Question 23

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

Accepted Answer

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.

Question 24

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

Accepted Answer

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.

Question 25

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

Accepted Answer

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.

Round-trip from	£220
One-way from	£114
Popular in	June
Cheapest in	January
Average price	£360
Good round-trip deal	£228 or less
Good one-way deal	£114 or less

Cheap flights from San Francisco to Boston from £114

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 15/9. 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 17 July 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 17 July 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 17 July 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 17 July 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 17 July 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 17 July 2026.

Last-minute flights from San Francisco to BostonDiscover last-minute flight deals from San Francisco to Boston. Data last updated 17 July 2026 and is based on user searches.

Discover last-minute flight deals from San Francisco to Boston. Data last updated 17 July 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 17 July 2026.

Search for one-way flight options from San Francisco to Boston. Find affordable one-way fares based on user searches. Data last updated 17 July 2026.

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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 71 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 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?

Weekly flight availability from San Francisco to Boston

The most flights from SFO to BOS are scheduled on a Thursday (53 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (33 on average).

How often are flights from San Francisco to Boston delayed?

About 17% of weekly flights between San Francisco and Boston have experienced delays in the past year, with the average delay time being 173 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, Alaska Airlines have had the lowest number of delays on this route, with just 14% of flights being delayed.

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 17 July 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.

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 cheapest airlines to fly from San Francisco to Boston one-way?

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?

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Alternative routes for San Francisco to Boston

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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 17 July 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

Book a non-stop flight to one of these other cities located in Massachusetts.

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 17 July 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 17 July 2026.

Popular flight searches

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Top airline flying from San Francisco to Boston

Fly with Cheapflights

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?

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 17 July 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 17 July 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 17 July 2026.

Last-minute flights from San Francisco to Boston
Discover last-minute flight deals from San Francisco to Boston. Data last updated 17 July 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 17 July 2026.