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.

How often are flights from Boston to San Francisco delayed?

About 21% of weekly flights between Boston and San Francisco have experienced delays in the past year, with the average delay time being 173 minutes.

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

Over the past year, United Airlines has had the lowest number of delays on this route, with just 19% of flights being delayed.

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

Historically, flights departing at night 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?

Flights from Boston Logan Intl to San Francisco have been viewed 5 times in the past calendar month.

How long is the flight from Boston to San Francisco?

For as low as C$ 478, Southwest can have you in San Francisco from Boston in 6h 27m. Airlines will cover a distance of 4339 km. This flight may include one or multiple stops.

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

Cheapflights users have booked flights from Boston to San Francisco round-trip from C$ 337. JetBlue is 40% cheaper than the average price of flights available within the next 90 days to this destination.

Weekly flight availability from Boston to San Francisco

The most flights from BOS to SFO are scheduled on a Tuesday (39 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (15 on average).

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 mm 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 C$ 444 for a flight from Boston to San Francisco. The cheapest flight overall is C$ 243 while the most popular route, (Boston Logan Intl - San Francisco) is currently priced at C$ 585.

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

No one likes to see their flight delayed. When booking a flight from Boston to San Francisco consider choosing Air China (90%), ANA (87%) or Korean Air (79%) as they are the most reliable in getting you off to your destination on time.

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

If you wish to fly to San Francisco from Boston, then you need to book flights from Boston Logan Intl to San Francisco. There are 21 flights from Logan Intl (BOS) to San Francisco (SFO) per day to choose from. Flights to San Francisco from Logan Intl are available from 1 airline, which means you should have some options if you want to compare airfare deals. 6h 26m is how long a nonstop flight from Boston to San Francisco typically takes.

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 vacation 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.

C$ 234+ Cheap Flights from Boston to San Francisco

Cheapflights Tip: The best prices from Boston Logan Intl to San Francisco are usually found in January or November, booked 41 days in advance, depart on a Friday or Wednesday and return on a Tuesday

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 10 September 2026.

Wed 7/107:45 a.m. -

Nonstop6h 40m

Wed 18/117:00 a.m. -

Nonstop5h 30m

Deal found 6/9C$ 444

Tue 20/109:35 p.m. -

Nonstop6h 30m

Tue 10/118:05 a.m. -

1 stop8h 36m

Deal found 5/9C$ 445

Sat 17/107:00 a.m. -

Nonstop6h 29m

Mon 26/107:30 a.m. -

Nonstop5h 35m

Deal found 5/9C$ 447

Wed 4/117:10 a.m. -

1 stop11h 01m

Sun 8/1111:58 p.m. -

1 stop7h 43m

Deal found 6/9C$ 448

Tue 6/109:20 a.m. -

Nonstop6h 23m

Sat 10/102:05 p.m. -

Nonstop5h 52m

Deal found 9/9C$ 451

Fri 23/105:00 p.m. -

Nonstop6h 39m

Wed 28/1012:40 p.m. -

Nonstop5h 40m

Deal found 6/9C$ 458

Wed 30/99:20 a.m. -

Nonstop6h 23m

Sat 3/1012:45 p.m. -

1 stop8h 14m

Deal found 9/9C$ 459

Wed 7/107:45 a.m. -

Nonstop6h 30m

Wed 14/1011:20 p.m. -

Nonstop5h 56m

Deal found 7/9C$ 460

Wed 28/106:14 p.m. -

1 stop29h 19m

Wed 4/115:42 p.m. -

1 stop8h 58m

Deal found 9/9C$ 462

Wed 7/107:45 a.m. -

Nonstop6h 40m

Sun 18/109:54 p.m. -

Nonstop5h 46m

Deal found 9/9C$ 465

Thu 29/1010:05 a.m. -

Nonstop6h 38m

Wed 4/117:00 a.m. -

Nonstop5h 45m

Deal found 5/9C$ 467

Find flight deals from Boston to San Francisco

Round-trip from	C$ 444
One-way from	C$ 234
Popular in	June
Cheapest in	January
Average price	C$ 564
Good one-way deal	C$ 246 or less

Delta
7/10-18/11
Nonstop
12h 10m total
Boston to San Francisco

Search Deals

United Airlines
20/10-31/12
Nonstop
6h 30m total
Boston to San Francisco

Search Deals

Highest demand for flights based on searches. 4% potential increase in price (C$ 32 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (C$ 10 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 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

Cheapest round-trip

BostonSan Francisco

BOS Boston Logan Intl - SFO San Francisco

BOSSFO

Boston Logan Intl

Sat 31/10

5:30 a.m.-2:35 p.m.

2 stops12h 05m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 261

BostonSan Francisco

BOS Boston Logan Intl - SFO San Francisco

BOSSFO

Boston Logan Intl

Sat 24/10

5:35 a.m.-2:35 p.m.

2 stops12h 00m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 261

Quickest round-trip

BostonSan Francisco

BOS Boston Logan Intl - SFO San Francisco

BOSSFO

Boston Logan Intl

Wed 23/9

5:15 p.m.-8:45 p.m.

Nonstop6h 30m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 267

BostonSan Francisco

BOS Boston Logan Intl - SFO San Francisco

BOSSFO

Boston Logan Intl

Sat 5/12

5:06 p.m.-11:39 p.m.

1 stop9h 33m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 274

BostonSan Francisco

BOS Boston Logan Intl - SFO San Francisco

BOSSFO

Boston Logan Intl

Tue 29/9

3:20 p.m.-11:20 p.m.

2 stops11h 00m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 274

BostonSan Francisco

BOS Boston Logan Intl - SFO San Francisco

BOSSFO

Boston Logan Intl

Thu 26/11

5:25 a.m.-1:15 p.m.

2 stops10h 50m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 296

BostonSan Francisco

BOS Boston Logan Intl - SFO San Francisco

BOSSFO

Boston Logan Intl

Sat 7/11

5:25 a.m.-2:30 p.m.

2 stops12h 05m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 296

BostonSan Francisco

BOS Boston Logan Intl - SFO San Francisco

BOSSFO

Boston Logan Intl

Sat 31/10

1:51 p.m.-5:40 p.m.

Nonstop6h 49m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 302

BostonSan Francisco

BOS Boston Logan Intl - SFO San Francisco

BOSSFO

Boston Logan Intl

Thu 17/12

12:45 p.m.-9:55 p.m.

2 stops12h 10m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 303

BostonSan Francisco

BOS Boston Logan Intl - SFO San Francisco

BOSSFO

Boston Logan Intl

Wed 14/10

10:05 a.m.-1:43 p.m.

Nonstop6h 38m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 316

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 24 resultsSorted by cheapest first

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 round-trip 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?

To ensure you get the cheapest price possible for a flight from Boston to San Francisco, you should look to book at least 40 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from Boston to San Francisco (average of C$ 467). Flying from Boston to San Francisco in June is currently the most expensive (average of C$ 638). 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?

When flying from Boston to San Francisco, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 69% versus a flight at noon.

How much does it cost to fly round-trip from Boston to San Francisco?

Airfare is below average for this route at the moment.

Boston to San Francisco flights typically cost between C$ 467 and C$ 731 in October.
The cheapest round-trip price found within the last 5 days was C$ 444 on Delta (7 Oct-18 Nov).

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

7.1

Good

3,041 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Feb 2025

BOS - SFO

Flight was delayed an hour due to a flight plan issue. Then additional fuel was needed. The crew did communicate well. Upon departure there was not food available for purchase, at least not by the time they got to row 23. Wifi didn't work consistently. Not the normal Jetblue experience. The Captain and crew were great though.

JetBlue

7.1

Good

3,041 reviews

JetBlue

7.1

Good

3,041 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Feb 2025

BOS - SFO

Related info for your journey

What airports do I use to fly from Boston to San Francisco?
If you wish to fly to San Francisco from Boston, then you need to book flights from Boston Logan Intl to San Francisco. There are 21 flights from Logan Intl (BOS) to San Francisco (SFO) per day to choose from. Flights to San Francisco from Logan Intl are available from 1 airline, which means you should have some options if you want to compare airfare deals. 6h 26m is how long a nonstop flight from Boston to San Francisco typically takes.
How popular is this Boston to San Francisco flight route?
Flights from Boston Logan Intl to San Francisco have been viewed 5 times in the past calendar month.
How long is the flight from Boston to San Francisco?
For as low as C$ 478, Southwest can have you in San Francisco from Boston in 6h 27m. Airlines will cover a distance of 4339 km. This flight may include one or multiple stops.
What is the cheapest airline to fly from Boston to San Francisco round-trip?
Cheapflights users have booked flights from Boston to San Francisco round-trip from C$ 337. JetBlue is 40% cheaper than the average price of flights available within the next 90 days to this destination.
What are the most reliable airlines from Boston to San Francisco?
No one likes to see their flight delayed. When booking a flight from Boston to San Francisco consider choosing Air China (90%), ANA (87%) or Korean Air (79%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from Boston to San Francisco?
On average you can expect to pay C$ 444 for a flight from Boston to San Francisco. The cheapest flight overall is C$ 243 while the most popular route, (Boston Logan Intl - San Francisco) is currently priced at C$ 585.
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 vacation 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, January is the cheapest month in which you can book a flight from Boston to San Francisco (average of C$ 467). Flying from Boston to San Francisco in June is currently the most expensive (average of C$ 638). 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

Santa Clara

Burlingame

San Bruno

Roseville

Livermore

South San Francisco

Novato

Manteca

Vallejo

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Alternative routes for Boston to San Francisco

Boston to Las Vegas flights

Boston to Los Angeles flights

Top airline flying from Boston to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
JetBlue	CheapestC$ 337	AverageC$ 408	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights

Fly with Cheapflights

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

When you search for this flight from Boston to San Francisco, 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.

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?

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

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

Not ready to book yet? You can track prices for flights from Boston to San Francisco on Cheapflights with our Price Alert feature and get notified when better prices are available.

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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Boston to San Francisco from C$ 234

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/10. 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 10 September 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 10 September 2026.

Best flights from Boston to San FranciscoDiscover carefully curated flight deals from Boston to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 10 September 2026.

Discover carefully curated flight deals from Boston to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 10 September 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 10 September 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 10 September 2026.

Last-minute flights from Boston to San FranciscoDiscover last-minute flight deals from Boston to San Francisco. Data last updated 10 September 2026 and is based on user searches.

Discover last-minute flight deals from Boston to San Francisco. Data last updated 10 September 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 10 September 2026.

Search for one-way flight options from Boston to San Francisco. Find affordable one-way fares based on user searches. Data last updated 10 September 2026.

Find flight deals from Boston to San Francisco

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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

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

To ensure you get the cheapest price possible for a flight from Boston to San Francisco, you should look to book at least 40 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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?

When flying from Boston to San Francisco, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 69% versus a flight at noon.

How much does it cost to fly round-trip from Boston to San Francisco?

Airfare is below average for this route at the moment.

Boston to San Francisco flights typically cost between C$ 467 and C$ 731 in October.The cheapest round-trip price found within the last 5 days was C$ 444 on Delta (7 Oct-18 Nov).

Weekly flight availability from Boston to San Francisco

The most flights from BOS to SFO are scheduled on a Tuesday (39 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (15 on average).

How often are flights from Boston to San Francisco delayed?

About 21% of weekly flights between Boston and San Francisco have experienced delays in the past year, with the average delay time being 173 minutes.

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

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening 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 Boston to San Francisco flights?

Over the past year, United Airlines has had the lowest number of delays on this route, with just 19% of flights being delayed.

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

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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Alternative routes for Boston to San Francisco

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Complete your trip

Complete your trip to San Francisco by adding a car rental and/or hotel reservation to your travel itinerary.

Direct flights to California

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Search flights from Boston to San Francisco by cabin class

Find flights from Boston to San Francisco, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Boston and San Francisco flights

Browse other Boston and San Francisco flight options. Last updated on 10 September 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 10 September 2026.

Popular flight searches

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Other flights to San Francisco

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Top airline flying from Boston to San Francisco

Fly with Cheapflights

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

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

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

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 10 September 2026.

Best flights from Boston to San Francisco
Discover carefully curated flight deals from Boston to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 10 September 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 10 September 2026.

Last-minute flights from Boston to San Francisco
Discover last-minute flight deals from Boston to San Francisco. Data last updated 10 September 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 10 September 2026.

Boston to San Francisco flights typically cost between C$ 467 and C$ 731 in October.
The cheapest round-trip price found within the last 5 days was C$ 444 on Delta (7 Oct-18 Nov).