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 Thursday 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.

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 14% of flights being delayed.

How often are flights from Boston to San Francisco delayed?

About 17% of weekly flights between Boston and San Francisco have experienced delays in the past year, with the average delay time being 175 minutes.

How popular is this Boston to San Francisco flight route?

Flights from Boston Logan Intl to San Francisco have been viewed 7 times in the past calendar month.

How long is the flight from Boston to San Francisco?

For as low as C$ 520, JetBlue can have you in San Francisco from Boston in 10h 04m. 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$ 165. JetBlue is 70% 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 Wednesday (48 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (35 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$ 1,606 for a flight from Boston to San Francisco. The cheapest flight overall is C$ 692 while the most popular route, (Boston Logan Intl - San Francisco) is currently priced at C$ 643.

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 Korean Air (89%), Air China (88%) or WestJet (86%) 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 39 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 31m 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$ 236+ Cheap Flights from Boston to San Francisco

Q: 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$ 790 and C$ 443 in July. The cheapest round-trip price found within the last 5 days was C$ 442 on Delta (1 Jul-6 Jul).

Cheapflights Tip: The best prices from Boston Logan Intl to San Francisco are usually found in January or September, booked 46 days in advance, depart on a Thursday or Monday and return on a Monday

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 8 June 2026.

Wed 1/77:20 a.m.

BOS

SFO

Nonstop6h 39m

Delta

Mon 6/710:00 p.m.

SFO

BOS

Nonstop5h 44m

Delta

Deal found 3/6C$ 442

Thu 10/94:00 p.m.

BOS

SFO

1 stop10h 31m

JetBlue

Tue 15/98:25 p.m.

SFO

BOS

1 stop8h 32m

JetBlue

Deal found 5/6C$ 443

Wed 29/76:20 a.m.

BOS

SFO

1 stop12h 24m

Delta

Tue 4/87:00 a.m.

SFO

BOS

Nonstop5h 45m

Delta

Deal found 7/6C$ 445

Wed 1/76:00 a.m.

BOS

SFO

Nonstop6h 27m

United Airlines

Wed 8/72:29 p.m.

SFO

BOS

1 stop7h 45m

United Airlines

Deal found 7/6C$ 447

Fri 24/77:28 a.m.

BOS

SFO

Nonstop6h 27m

United Airlines

Tue 28/74:15 p.m.

SFO

BOS

Nonstop5h 56m

United Airlines

Deal found 8/6C$ 449

Thu 23/75:00 p.m.

BOS

SFO

Nonstop6h 34m

JetBlue

Tue 11/88:25 p.m.

SFO

BOS

1 stop7h 44m

JetBlue

Deal found 5/6C$ 450

Sat 5/99:20 a.m.

BOS

SFO

Nonstop6h 23m

United Airlines

Mon 12/109:15 p.m.

SFO

BOS

Nonstop5h 56m

United Airlines

Deal found 7/6C$ 452

Mon 29/68:55 p.m.

BOS

SFO

Nonstop6h 36m

JetBlue

Tue 7/76:00 a.m.

SFO

BOS

Nonstop5h 41m

JetBlue

Deal found 7/6C$ 453

Tue 1/95:25 a.m.

BOS

SFO

2 stops10h 30m

Southwest

Sun 6/96:40 p.m.

SFO

BOS

1 stop8h 20m

Southwest

Deal found 7/6C$ 454

Wed 12/85:35 a.m.

BOS

SFO

1 stop8h 00m

Southwest

Tue 18/811:15 a.m.

SFO

BOS

1 stop10h 10m

Southwest

Deal found 5/6C$ 456

Thu 20/88:40 a.m.

BOS

SFO

1 stop11h 55m

Southwest

Mon 24/812:30 p.m.

SFO

BOS

1 stop8h 55m

Southwest

Deal found 7/6C$ 457

Sun 28/68:55 p.m.

BOS

SFO

Nonstop6h 36m

JetBlue

Tue 7/711:48 p.m.

SFO

BOS

Nonstop5h 42m

JetBlue

Deal found 5/6C$ 459

Find flight deals from Boston to San Francisco

Round-trip from	C$ 442
One-way from	C$ 236
Popular in	April
Cheapest in	January
Average price	C$ 574
Good round-trip deal	C$ 692 or less

Delta
2/7-8/7
Nonstop
12h 21m total
Boston to San Francisco

Search Deals

United Airlines
29/6
Nonstop
6h 37m total
Boston to San Francisco

Search Deals

Highest demand for flights based on searches. 7% potential increase in price (C$ 65 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (C$ 12 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in June 2026

Search Deals

Price to beat on a round-trip flight from Boston Logan Intl to San Francisco.

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 20/8

6:35 a.m.-10:06 a.m.

Nonstop6h 31m

San Francisco

Tue 1/9

3:19 p.m.-11:59 p.m.

Nonstop5h 40m

C$ 442

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 18/9

9:33 a.m.-4:37 p.m.

1 stop10h 04m

San Francisco

Tue 29/9

11:57 a.m.-6:09 a.m.

1 stop15h 12m

C$ 520

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 7/7

5:50 a.m.-10:30 a.m.

1 stop7h 40m

San Francisco

Tue 14/7

11:40 p.m.-12:15 p.m.

1 stop9h 35m

C$ 523

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 16/7

8:20 p.m.-11:57 p.m.

Nonstop6h 37m

San Francisco

Fri 24/7

2:29 p.m.-1:14 a.m.

1 stop7h 45m

C$ 531

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Mon 27/7

6:35 a.m.-10:05 a.m.

Nonstop6h 30m

San Francisco

Mon 27/7

9:44 p.m.-6:28 a.m.

Nonstop5h 44m

C$ 539

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 12/11

7:30 a.m.-11:15 a.m.

Nonstop6h 45m

San Francisco

Sun 15/11

11:20 p.m.-8:23 a.m.

Nonstop6h 03m

C$ 562

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 4/11

5:05 p.m.-8:52 p.m.

Nonstop6h 47m

San Francisco

Sat 7/11

6:00 a.m.-2:32 p.m.

Nonstop5h 32m

C$ 562

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 5/8

2:45 p.m.-10:05 p.m.

2 stops10h 20m

San Francisco

Wed 19/8

7:25 p.m.-9:50 a.m.

2 stops11h 25m

C$ 564

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sun 23/8

7:30 a.m.-3:05 p.m.

2 stops10h 35m

San Francisco

Tue 25/8

7:25 p.m.-9:30 a.m.

2 stops11h 05m

C$ 588

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Mon 29/6

5:05 p.m.-8:56 p.m.

Nonstop6h 51m

San Francisco

Mon 13/7

7:10 a.m.-3:55 p.m.

Nonstop5h 45m

C$ 595

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/6

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 45 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$ 474). Flying from Boston to San Francisco in April is currently the most expensive (average of C$ 637). 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 evening, which can drop the price by up to 65% versus a flight at noon.

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

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

2,977 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dave,Jun 2026

MCO - ROC

When i book 2 tickets they should keep them together even though I can't choose a seat

JetBlue

7.1

Good

2,977 reviews

JetBlue

7.1

Good

2,977 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dave,Jun 2026

MCO - ROC

When i book 2 tickets they should keep them together even though I can't choose a seat

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 39 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 31m 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 7 times in the past calendar month.
How long is the flight from Boston to San Francisco?
For as low as C$ 520, JetBlue can have you in San Francisco from Boston in 10h 04m. 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$ 165. JetBlue is 70% 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 Korean Air (89%), Air China (88%) or WestJet (86%) 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$ 1,606 for a flight from Boston to San Francisco. The cheapest flight overall is C$ 692 while the most popular route, (Boston Logan Intl - San Francisco) is currently priced at C$ 643.
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$ 474). Flying from Boston to San Francisco in April is currently the most expensive (average of C$ 637). 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

Burlingame

San Bruno

Roseville

Livermore

South San Francisco

Novato

Santa Clara

Vallejo

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Direct flights to California

Flights by cabin class

Other flight options

Other flights from Boston

Popular flights

San Francisco flight routes

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$ 165	AverageC$ 398	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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

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$ 236

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 18/6. 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 8 June 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 8 June 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 8 June 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 8 June 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 8 June 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 8 June 2026.

Last-minute flights from Boston to San FranciscoDiscover last-minute flight deals from Boston to San Francisco. Data last updated 8 June 2026 and is based on user searches.

Discover last-minute flight deals from Boston to San Francisco. Data last updated 8 June 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 8 June 2026.

Search for one-way flight options from Boston to San Francisco. Find affordable one-way fares based on user searches. Data last updated 8 June 2026.

Find flight deals from Boston to San Francisco

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip 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?

How much does it cost to fly round-trip 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 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?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Boston to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.

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

Book a non-stop flight to one of these other cities located in California.

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 8 June 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 8 June 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Other flights to San Francisco

Explore flights to San Francisco departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 8 June 2026.

Top airline flying from Boston to San Francisco

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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?

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

100% Free

Book with Flexibility

Travel Smart

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 8 June 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 8 June 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 8 June 2026.

Last-minute flights from Boston to San Francisco
Discover last-minute flight deals from Boston to San Francisco. Data last updated 8 June 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 8 June 2026.