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 $476 and $777 in September. The cheapest return price found within the last 5 days was $411 on Multiple Airlines (12 Sept–19 Sept).

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

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 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 $476 and $777 in September.
The cheapest return price found within the last 5 days was $411 on Multiple Airlines (12 Sept–19 Sept).

Question 4

How often are flights from San Francisco to Boston delayed?

Accepted Answer

About 18% of weekly flights between San Francisco and Boston have experienced delays in the past year, with the average delay time being 178 minutes.

Question 5

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

Accepted Answer

Over the past year, Delta have had the lowest number of delays on this route, with just 17% of flights being delayed.

Question 6

How popular is this San Francisco to Boston flight route?

Accepted Answer

The San Francisco to Boston Logan Intl flight path was viewed by 7 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

Airlines like Delta and JetBlue fly from San Francisco to Boston in about 5h 28m. The time it takes to get you to your destination is usually consistent. Airlines will cover a distance of 4339 km. Most flights are nonstop.

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 61 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 $476). Flying from San Francisco to Boston in June is currently the most expensive (average of $715). 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 Sunday (48 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (30 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 cheapest flights from San Francisco to Boston?

Accepted Answer

The cheapest flight price from San Francisco to Boston is $180. On average you can expect to pay $507. The most popular route, (San Francisco - Boston Logan Intl), can usually be booked for $424.

Question 14

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 ITA Airways(100%), Scandinavian Airlines(87%) or Virgin Australia(82%), as they are the most reliable in getting you off to your destination on time.

Question 15

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

Accepted Answer

It’s optimal to fly from San Francisco to Boston in the evening. By choosing this option you can save up to 46% on the cost of your flight, compared to a flight in the afternoon.

Question 16

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 17

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 18

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 19

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

Accepted Answer

When you search for this flight from San Francisco to Boston, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Question 20

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

Accepted Answer

Millions of users choose and trust Cheapflights to book the best flight deals from San Francisco to Boston for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Question 21

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

Accepted Answer

Certainly. Search results for flights to Boston from San Francisco shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Question 22

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	$411
One-way from	$220
Popular in	June
Cheapest in	January
Average price	$590
Good round-trip deal	$684 or less
Good one-way deal	$267 or less

Cheap flights from San Francisco to Boston from $220

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 31/10. 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 4 August 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 4 August 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 4 August 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 4 August 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 4 August 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 4 August 2026.

Last-minute flights from San Francisco to BostonDiscover last-minute flight deals from San Francisco to Boston. Data last updated 4 August 2026 and is based on user searches.

Discover last-minute flight deals from San Francisco to Boston. Data last updated 4 August 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 4 August 2026.

Search for one-way flight options from San Francisco to Boston. Find affordable one-way fares based on user searches. Data last updated 4 August 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 61 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?

It’s optimal to fly from San Francisco to Boston in the evening. By choosing this option you can save up to 46% on the cost of your flight, compared to a flight in the afternoon.

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 $476 and $777 in September.The cheapest return price found within the last 5 days was $411 on Multiple Airlines (12 Sept–19 Sept).

Weekly flight availability from San Francisco to Boston

The most flights from SFO to BOS are scheduled on a Sunday (48 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (30 on average).

How often are flights from San Francisco to Boston delayed?

About 18% of weekly flights between San Francisco and Boston have experienced delays in the past year, with the average delay time being 178 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, Delta have had the lowest number of delays on this route, with just 17% 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?

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?

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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 4 August 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 4 August 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 4 August 2026.

Last-minute flights from San Francisco to Boston
Discover last-minute flight deals from San Francisco to Boston. Data last updated 4 August 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 4 August 2026.

San Francisco to Boston flights typically cost between $476 and $777 in September.
The cheapest return price found within the last 5 days was $411 on Multiple Airlines (12 Sept–19 Sept).