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

Airfare is below average for this route at the moment. Boston to San Francisco flights typically cost between £430 and £249 in June. The cheapest return flight price found within the last 3 days was £204 on Alaska Airlines (2 Jun-9 Jun).

Question 1

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

Accepted Answer

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

Question 2

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

Accepted Answer

Airfare is below average for this route at the moment.Boston to San Francisco flights typically cost between £430 and £249 in June.
The cheapest return flight price found within the last 3 days was £204 on Alaska Airlines (2 Jun-9 Jun).

Question 3

How often are flights from Boston to San Francisco delayed?

Accepted Answer

About 16% of weekly flights between Boston and San Francisco have experienced delays in the past year, with the average delay time being 180 minutes.

Question 4

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

Accepted Answer

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

Question 5

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

Accepted Answer

Over the past year, United Airlines have had the lowest number of delays on this route, with just 13% of flights being delayed.

Question 6

How popular is this Boston to San Francisco flight route?

Accepted Answer

Within the past month, 4 users have taken a look at flights from Boston Logan Intl to San Francisco.

Question 7

How long is the flight from Boston to San Francisco?

Accepted Answer

Departing from Boston to San Francisco will take you 6h 45m. Boston and San Francisco are separated by a distance of 2696 mi. This flight may include one or multiple stops.

Question 8

What are the cheapest airlines flying from Boston to San Francisco round-trip?

Accepted Answer

Flying on JetBlue is currently your cheapest option to San Francisco, with prices starting at £179. Another option worth looking into is Delta, starting at £293 return. You may be able to fly from Boston to San Francisco for 37% less than the average price by searching for these airlines.

Question 9

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

Accepted Answer

Booking 90 days in advance of your planned departure date is, on average, the best time to get cheap flights from Boston to San Francisco. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Question 10

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

Accepted Answer

Currently, September is the cheapest month in which you can book a flight from Boston to San Francisco (average of £249). Flying from Boston to San Francisco in April is currently the most expensive (average of £342). 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 11

Weekly flight availability from Boston to San Francisco

Accepted Answer

The most flights from BOS to SFO are scheduled on a Thursday (39 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (22 on average).

Question 12

E

Accepted Answer

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 inches per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco when rainfall is around 0.0 mm.

Question 13

E

Accepted Answer

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

Question 14

What are the cheapest flights from Boston to San Francisco?

Accepted Answer

On average you can expect to pay £367 for a flight from Boston to San Francisco. The cheapest flight overall is £138 while the most popular route, (Boston Logan Intl - San Francisco) is currently priced at £199.

Question 15

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

Accepted Answer

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Boston to San Francisco on time: WestJet (88%), Japan Airlines (79%), United Airlines (78%).

Question 16

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

Accepted Answer

A simple way to save on the total cost of your ticket is to fly from Boston to San Francisco in the evening. If you’re flexible enough to do this you can expect to save up to 52% on your trip compared to booking a flight at midday.

Question 17

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

Accepted Answer

You will need to book a flight from Boston Logan Intl to San Francisco if you want to fly from Boston to San Francisco. At least 2 different airlines have flights from Logan Intl (BOS) to San Francisco (SFO) on a regular basis. There are 30 flights to San Francisco from the Boston airport per day. If you manage to book one that is nonstop, then you can expect the flight time from BOS to SFO to be around 6h 40m.

Question 18

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

Accepted Answer

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

Question 19

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

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to San Francisco.

Question 20

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

Accepted Answer

Yes. Cheapflights offers flight deals from Boston to San Francisco 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 21

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

Accepted Answer

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Boston to San Francisco. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Question 22

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

Accepted Answer

Cheapflights helps you find that perfect flight to San Francisco from Boston by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Question 23

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

Accepted Answer

Yes! Cheapflights helps users easily find flights from Boston to San Francisco with no change fees.

Question 24

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

Accepted Answer

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to San Francisco from Boston today and book when prices fit your budget.

Round-trip from	£204
One-way from	£110
Popular in	April
Cheapest in	September
Average price	£342
Good round-trip deal	£440 or less
Good one-way deal	£192 or less

Airline	Cheapest	Average	Flexibility	On-time
JetBlue	Cheapest£179	Average£389	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Delta	Cheapest£293	Average£440	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights

Cheap flights from Boston to San Francisco 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 27/5. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Boston to San Francisco

Cheapest flights from Boston to San FranciscoExplore the most affordable flight options available from Boston to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2026.

Explore the most affordable flight options available from Boston to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2026.

Best flights from Boston to San FranciscoDiscover carefully curated flight deals from Boston to San Francisco that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 April 2026.

Discover carefully curated flight deals from Boston to San Francisco that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 April 2026.

Direct flights from Boston to San FranciscoExplore direct flight options from Boston to San Francisco based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 April 2026.

Explore direct flight options from Boston to San Francisco based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 April 2026.

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

Discover last-minute flight deals from Boston to San Francisco. Data last updated 17 April 2026 and is based on user searches.

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

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

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Best time to book a flight from Boston to San Francisco

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Everything you need to know about your flight from Boston to San Francisco

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

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

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

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

Weekly flight availability from Boston to San Francisco

How often are flights from Boston to San Francisco delayed?

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

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

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

Reviews of airlines servicing San Francisco

Get a feel of what it's like to fly with Delta and JetBlue from Boston to San Francisco by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Boston to San Francisco. 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 Boston to San Francisco?

How popular is this Boston to San Francisco flight route?

How long is the flight from Boston to San Francisco?

What are the cheapest airlines flying from Boston to San Francisco round-trip?

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

What are the cheapest flights from Boston to San Francisco?

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

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

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

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

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Boston and San Francisco flights

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Other flights from Boston

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Top 2 airlines flying from Boston to San Francisco

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

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Cheapest flights from Boston to San Francisco
Explore the most affordable flight options available from Boston to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2026.

Best flights from Boston to San Francisco
Discover carefully curated flight deals from Boston to San Francisco that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 April 2026.

Direct flights from Boston to San Francisco
Explore direct flight options from Boston to San Francisco based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 April 2026.

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

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