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

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

How often are flights from Boston to San Francisco delayed?

About 16% of weekly flights between Boston and San Francisco have experienced delays in the past year, with the average delay time being 172 minutes.

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

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.

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

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

How popular is this Boston to San Francisco flight route?

Within the past month, 5 users have taken a look at flights from Boston Logan Intl to San Francisco.

How long is the flight from Boston to San Francisco?

Departing from Boston to San Francisco will take you 6h 58m. Boston and San Francisco are separated by a distance of 2696 mi. This flight may include one or multiple stops.

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

Flying on JetBlue is currently your cheapest option to San Francisco, with prices starting at £178. You may be able to fly from Boston to San Francisco for 34% less than the average price by searching for this airline.

Weekly flight availability from Boston to San Francisco

The most flights from BOS to SFO are scheduled on a Thursday (38 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 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.

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).

What are the cheapest flights from Boston to San Francisco?

On average you can expect to pay £288 for a flight from Boston to San Francisco. The cheapest flight overall is £126 while the most popular route, (Boston Logan Intl - San Francisco) is currently priced at £216.

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

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: KLM (93%), JetBlue (80%), Hawaiian Airlines (77%).

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

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 1 airline has flights from Logan Intl (BOS) to San Francisco (SFO) on a regular basis. There are 28 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 49m.

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

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

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

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.

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

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.

£84+ Cheap Flights from Boston to San Francisco

Cheapflights Tip: The best prices from Boston Logan Intl to San Francisco are usually found in September or January, booked 90 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Boston to San Francisco

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

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 13 February 2026.

Tue 3/307:00

BOS

SFO

1 stop10h 02m

Alaska Airlines

Tue 10/313:45

SFO

BOS

1 stop14h 09m

Alaska Airlines

Deal found 10/2£167

Wed 4/317:44

BOS

SFO

1 stop9h 15m

Alaska Airlines

Tue 17/311:34

SFO

BOS

1 stop9h 25m

Alaska Airlines

Deal found 13/2£170

Wed 11/305:45

BOS

SFO

Nonstop6h 58m

United Airlines

Tue 17/323:35

SFO

BOS

Nonstop5h 38m

United Airlines

Deal found 13/2£174

Mon 2/316:36

BOS

SFO

1 stop10h 08m

Alaska Airlines

Tue 3/311:34

SFO

BOS

1 stop9h 25m

Alaska Airlines

Deal found 13/2£178

Tue 10/307:00

BOS

SFO

1 stop10h 02m

Alaska Airlines

Tue 10/316:21

SFO

BOS

1 stop11h 33m

Alaska Airlines

Deal found 12/2£181

Sat 2/507:40

BOS

SFO

Nonstop6h 49m

Delta

Sat 9/507:05

SFO

BOS

Nonstop5h 56m

Delta

Deal found 10/2£181

Thu 5/317:44

BOS

SFO

1 stop9h 15m

Alaska Airlines

Wed 11/311:34

SFO

BOS

1 stop9h 25m

Alaska Airlines

Deal found 12/2£183

Tue 3/307:00

BOS

SFO

1 stop10h 02m

Alaska Airlines

Tue 3/316:21

SFO

BOS

1 stop11h 33m

Alaska Airlines

Deal found 13/2£184

Wed 4/307:45

BOS

SFO

Nonstop7h 02m

Delta

Tue 10/313:00

SFO

BOS

Nonstop5h 39m

Delta

Deal found 13/2£185

Sat 18/420:16

BOS

SFO

Nonstop6h 43m

United Airlines

Tue 21/412:35

SFO

BOS

1 stop8h 24m

United Airlines

Deal found 11/2£186

Tue 10/307:40

BOS

SFO

Nonstop6h 58m

Delta

Tue 17/313:05

SFO

BOS

1 stop13h 27m

Delta

Deal found 13/2£188

Thu 5/307:45

BOS

SFO

Nonstop7h 02m

Delta

Wed 11/313:00

SFO

BOS

Nonstop5h 39m

Delta

Deal found 13/2£189

Find flight deals from Boston to San Francisco

Round-trip from	£167
One-way from	£84
Popular in	December
Cheapest in	September
Average price	£284
Good one-way deal	£126 or less

Alaska Airlines
3/3-10/3
2 total stops
22h 19m total
Boston to San Francisco

Search Deals

Alaska Airlines
10/3
1 total stop
12h 05m total
Boston to San Francisco

Search Deals

Highest demand for flights based on searches. 2% potential increase in price (£5 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 February 2026

Search Deals

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

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 4/3

07:45-11:47

Nonstop7h 02m

San Francisco

Wed 25/3

13:00-21:39

Nonstop5h 39m

£174

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 3/3

07:00-14:02

1 stop10h 02m

San Francisco

Mon 9/3

19:28-06:54

1 stop8h 26m

£178

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 12/3

07:40-11:38

Nonstop6h 58m

San Francisco

Wed 25/3

13:00-21:39

Nonstop5h 39m

£189

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 5/3

17:44-23:59

1 stop9h 15m

San Francisco

Mon 9/3

19:28-06:54

1 stop8h 26m

£191

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 20/3

05:45-09:43

Nonstop6h 58m

San Francisco

Tue 24/3

23:59-10:49

1 stop7h 50m

£196

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 24/2

16:40-20:29

Nonstop6h 49m

San Francisco

Wed 25/2

15:25-23:58

Nonstop5h 33m

£197

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Mon 6/4

05:30-09:11

Nonstop6h 41m

San Francisco

Sat 11/4

23:52-11:01

1 stop8h 09m

£200

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sun 3/5

06:50-10:29

Nonstop6h 39m

San Francisco

Tue 5/5

06:55-15:40

Nonstop5h 45m

£202

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 26/5

20:50-00:23

Nonstop6h 33m

San Francisco

Fri 5/6

21:54-06:45

Nonstop5h 51m

£202

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 26/3

18:09-21:59

Nonstop6h 50m

San Francisco

Mon 30/3

20:44-05:15

Nonstop5h 31m

£203

Flights are sorted by cheapest return flights first.

Deals found on 11/2

Showing 1-10 of 23 results

Best time to book a flight from Boston to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Boston with our price prediction graph.

BOS-SFO

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 Boston to San Francisco

Prices

Airlines

Delays

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

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.

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

Currently, March is the cheapest month in which you can book a flight from Boston to San Francisco (average of £72). Flying from Boston to San Francisco in January is currently the most expensive (average of £145). 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 BOS to SFO?

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.

Reviews of airlines servicing San Francisco

Get a feel of what it's like to fly with 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.

JetBlue

7.2

Good

2,898 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Jeff,Dec 2025

LAX - BOS

We boarded an hour and a half late and the crew was very salty when asked why. Still got no reason other than someone took the intended plane? Won't fly with them again.

JetBlue

7.2

Good

2,898 reviews

JetBlue

7.2

Good

2,898 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Jeff,Dec 2025

LAX - BOS

We boarded an hour and a half late and the crew was very salty when asked why. Still got no reason other than someone took the intended plane? Won't fly with them again.

Related info for your journey

What airports do I use to fly from Boston to San Francisco?
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 1 airline has flights from Logan Intl (BOS) to San Francisco (SFO) on a regular basis. There are 28 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 49m.
How popular is this Boston to San Francisco flight route?
Within the past month, 5 users have taken a look at flights from Boston Logan Intl to San Francisco.
How long is the flight from Boston to San Francisco?
Departing from Boston to San Francisco will take you 6h 58m. Boston and San Francisco are separated by a distance of 2696 mi. This flight may include one or multiple stops.
What is the cheapest airline to fly from Boston to San Francisco round-trip?
Flying on JetBlue is currently your cheapest option to San Francisco, with prices starting at £178. You may be able to fly from Boston to San Francisco for 34% less than the average price by searching for this airline.
What are the most reliable airlines from Boston to San Francisco?
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: KLM (93%), JetBlue (80%), Hawaiian Airlines (77%).
What are the cheapest flights from Boston to San Francisco?
On average you can expect to pay £288 for a flight from Boston to San Francisco. The cheapest flight overall is £126 while the most popular route, (Boston Logan Intl - San Francisco) is currently priced at £216.
Can I find deals for flights from Boston to San Francisco that include hotel bookings?
Yes. In addition to deals on Boston to San Francisco flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Boston to San Francisco?
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.
Can I find deals for business class flights from Boston to San Francisco?
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.
What is the cheapest month to book a flight from Boston to San Francisco?
Currently, March is the cheapest month in which you can book a flight from Boston to San Francisco (average of £72). Flying from Boston to San Francisco in January is currently the most expensive (average of £145). 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 Boston to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
JetBlue	Cheapest£178	Average£335	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights

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

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.

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

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!

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

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

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

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.

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Cheap flights from Boston to San Francisco from £84

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 10/3. 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 13 February 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 13 February 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 13 February 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 13 February 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 13 February 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 13 February 2026.

Last-minute flights from Boston to San FranciscoDiscover last-minute flight deals from Boston to San Francisco. Data last updated 13 February 2026 and is based on user searches.

Discover last-minute flight deals from Boston to San Francisco. Data last updated 13 February 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 13 February 2026.

Search for one-way flight options from Boston to San Francisco. Find affordable one-way fares based on user searches. Data last updated 13 February 2026.

Find flight deals from Boston to San Francisco

Round-trip from

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 Boston to San Francisco that are best for you.

Best time to book a flight from Boston to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Boston with our price prediction graph.

Cheapflights Insights

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?

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 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 is the cheapest airline to fly 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?

Travelling to a place near San Francisco?

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Boston and San Francisco flights

Browse other Boston and San Francisco flight options. Last updated on 13 February 2026.

Other flights from Boston

Browse through other flights departing from Boston. Flights are based on user searches made on Cheapflights and were last updated on 13 February 2026.

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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 13 February 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 13 February 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 13 February 2026.

Last-minute flights from Boston to San Francisco
Discover last-minute flight deals from Boston to San Francisco. Data last updated 13 February 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 13 February 2026.