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 $658 and $1,076 in November. The cheapest return price found within the last 5 days was $601 on Delta (2 Nov–4 Nov).

Question 1

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 2

How often are flights from San Francisco to Boston delayed?

Accepted Answer

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.

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 $658 and $1,076 in November.
The cheapest return price found within the last 5 days was $601 on Delta (2 Nov–4 Nov).

Question 4

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 5

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

Accepted Answer

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

Question 6

How popular is this San Francisco to Boston flight route?

Accepted Answer

Within the past month, 1 users have taken a look at flights from San Francisco to Boston Logan Intl.

Question 7

How long is the flight from San Francisco to Boston?

Accepted Answer

For as low as $639, Southwest can have you in Boston from San Francisco in 7h 38m. There are 4339 km between San Francisco and Boston. This flight may include one or multiple stops.

Question 8

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

Accepted Answer

The best time to book flights from San Francisco to Boston is 70 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Question 9

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 $599). Flying from San Francisco to Boston in June is currently the most expensive (average of $899). 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 10

Weekly flight availability from San Francisco to Boston

Accepted Answer

The most flights from SFO to BOS are scheduled on a Monday (47 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (17 on average).

Question 11

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 12

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 13

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

Accepted Answer

No one likes to see their flight delayed. When booking a flight from San Francisco to Boston consider choosing Japan Airlines(83%), Scandinavian Airlines(82%) or Etihad Airways(81%), as they are the most reliable in getting you off to your destination on time.

Question 14

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

Accepted Answer

When flying from San Francisco to Boston, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Question 15

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 16

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 17

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 18

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

Accepted Answer

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Boston from San Francisco today with Cheapflights!

Question 19

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 20

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

Accepted Answer

Cheapflights does show flights with no change fees to all users. To see these options for flights from San Francisco to Boston, users can toggle the no change fees filter when performing a flight search.

Question 21

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

Accepted Answer

Yes, Cheapflights offers price alerts on San Francisco to Boston flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

Round-trip from	$601
One-way from	$319
Popular in	June
Cheapest in	January
Average price	$849

Cheap flights from San Francisco to Boston from $319

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/11. 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 14 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 14 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 14 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 14 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 14 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 14 October 2026.

Last-minute flights from San Francisco to BostonDiscover last-minute flight deals from San Francisco to Boston. Data last updated 14 October 2026 and is based on user searches.

Discover last-minute flight deals from San Francisco to Boston. Data last updated 14 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 14 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 14 October 2026.

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Best time to book a flight from San Francisco to Boston

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Cheapflights Insights

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

The best time to book flights from San Francisco to Boston is 70 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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?

When flying from San Francisco to Boston, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 $658 and $1,076 in November.The cheapest return price found within the last 5 days was $601 on Delta (2 Nov–4 Nov).

Weekly flight availability from San Francisco to Boston

The most flights from SFO to BOS are scheduled on a Monday (47 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (17 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.

Related info for your journey

How popular is this San Francisco to Boston flight route?

How long is the flight from San Francisco to Boston?

What are the most reliable airlines 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?

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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?

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

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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 14 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 14 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 14 October 2026.

Last-minute flights from San Francisco to Boston
Discover last-minute flight deals from San Francisco to Boston. Data last updated 14 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 14 October 2026.

San Francisco to Boston flights typically cost between $658 and $1,076 in November.
The cheapest return price found within the last 5 days was $601 on Delta (2 Nov–4 Nov).