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$119+ Cheap flights from Boston to San Francisco (BOS - SFO)

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 1/18. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SFO
Jan 22 — Jan 291
Thu 1/22
Thu 1/29
1 adult, Economy
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Find cheap flights from Boston to San Francisco with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Boston Logan Intl to San Francisco are usually found in March or January, booked 67 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from Boston to San Francisco

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 December 23, 2025.

This Delta deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:40 amBOS - SFO
Nonstop6h 57mDelta
Tue 1/277:10 amSFO - BOS
Nonstop5h 41mDelta
Deal found 12/22$397
This Expedia deal was found by Cheapflights users on 12/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:00 amBOS - SFO
1 stop10h 13mMultiple Airlines
Tue 12/303:22 pmSFO - BOS
Nonstop5h 33mMultiple Airlines
Deal found 12/20$406
This Expedia deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 amBOS - SFO
1 stop10h 13mMultiple Airlines
Mon 1/57:20 pmSFO - BOS
1 stop7h 50mMultiple Airlines
Deal found 12/22$409
This Delta deal was found by Cheapflights users on 12/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/215:25 pmBOS - SFO
Nonstop6h 51mDelta
Mon 1/261:00 pmSFO - BOS
Nonstop5h 37mDelta
Deal found 12/21$417
This JetBlue deal was found by Cheapflights users on 12/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/218:59 pmBOS - SFO
Nonstop6h 53mJetBlue
Mon 1/121:50 pmSFO - BOS
Nonstop5h 39mJetBlue
Deal found 12/20$418
This Alaska Airlines deal was found by Cheapflights users on 12/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/217:23 pmBOS - SFO
Nonstop6h 47mAlaska Airlines
Mon 1/2612:00 pmSFO - BOS
1 stop8h 54mAlaska Airlines
Deal found 12/21$427
This JetBlue deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/298:00 amBOS - SFO
Nonstop6h 55mJetBlue
Wed 1/711:42 pmSFO - BOS
1 stop9h 12mJetBlue
Deal found 12/22$430
This United Airlines deal was found by Cheapflights users on 12/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/214:47 pmBOS - SFO
1 stop9h 18mUnited Airlines
Mon 1/2611:55 pmSFO - BOS
1 stop8h 17mUnited Airlines
Deal found 12/21$437
This United Airlines deal was found by Cheapflights users on 12/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:44 pmBOS - SFO
1 stop8h 33mUnited Airlines
Mon 1/511:35 pmSFO - BOS
1 stop8h 17mUnited Airlines
Deal found 12/21$442
This JetBlue deal was found by Cheapflights users on 12/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/258:59 pmBOS - SFO
Nonstop6h 53mJetBlue
Tue 1/137:00 amSFO - BOS
1 stop8h 48mJetBlue
Deal found 12/20$445

Find flight deals from Boston to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 23, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$222
(Southwest)

One-way from

$119
(Delta)

Popular in

December

Cheapest in

March

Average price

$455

Good round-trip deal

$282 or less

Good one-way deal

$200 or less
Provider with most accurate pricing for Boston Logan Intl-San Francisco flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-San Francisco flights.
Search Deals
From Boston Logan Intl to San Francisco
Search Deals
One-way flight from Boston Logan Intl to San Francisco
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($18 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Boston Logan Intl to San Francisco.
Search Deals
Price to beat on a one-way flight from Boston Logan Intl to San Francisco.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to San Francisco that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 23, 2025.
Use the filters below to find and compare flights from Boston to San Francisco that are best for you.

Fly from

Boston

Fly to

San Francisco

Route

Depart

Return

Price

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 1/24

7:45 pm-11:38 pm

Nonstop6h 53m

San Francisco

Sun 2/1

3:25 pm-11:58 pm

Nonstop5h 33m

$237

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 1/16

5:40 pm-9:42 pm

Nonstop7h 02m

San Francisco

Sun 1/18

7:10 am-3:51 pm

Nonstop5h 41m

$237

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 1/16

7:09 pm-10:59 pm

Nonstop6h 50m

San Francisco

Fri 1/23

3:25 pm-11:58 pm

Nonstop5h 33m

$237

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 2/5

7:11 am-11:10 am

Nonstop6h 59m

San Francisco

Sun 2/8

8:30 pm-5:01 am

Nonstop5h 31m

$237

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 1/14

6:50 am-2:20 pm

2 stops10h 30m

San Francisco

Tue 1/20

9:50 am-10:30 pm

1 stop9h 40m

$242

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 2/21

8:33 pm-12:25 am

Nonstop6h 52m

San Francisco

Tue 2/24

3:25 pm-11:58 pm

Nonstop5h 33m

$245

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Mon 1/26

4:16 pm-11:00 pm

1 stop9h 44m

San Francisco

Sat 1/31

8:25 am-5:13 pm

Nonstop5h 48m

$247

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 1/13

3:05 pm-6:55 pm

Nonstop6h 50m

San Francisco

Fri 1/16

3:25 pm-11:58 pm

Nonstop5h 33m

$247

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 2/19

7:00 am-11:00 am

Nonstop7h 00m

San Francisco

Wed 2/25

11:30 pm-10:20 am

1 stop7h 50m

$255

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 1/22

5:07 pm-12:22 am

1 stop10h 15m

San Francisco

Sun 1/25

3:25 pm-11:58 pm

Nonstop5h 33m

$265

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 24 results
1
2
3

Compare providers for flights from Boston to San Francisco

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to San Francisco in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
OvagoPrice Accuracy2 starsTrust Score*2 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Boston-San Francisco flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Boston-San Francisco flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from Boston-San Francisco flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-San Francisco flights, Cheapflights users trust CheapOair the most. CheapOair has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.
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

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

Use this chart to determine the optimal time to book a round-trip flight from Boston to San Francisco. Price data was last updated on December 19, 2025.

To ensure you get the cheapest price possible for a flight from Boston to San Francisco, you should look to book at least 67 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, March is the cheapest month in which you can book a flight from Boston to San Francisco (average of $103). Flying from Boston to San Francisco in May is currently the most expensive (average of $179). 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?

Find hourly flight availability from Boston to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 23, 2025.

It’s typically best to fly out from Boston to San Francisco in the evening. Doing so could potentially save you 35% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from Boston to San Francisco?

Use this chart to determine the cheapest time to fly round-trip from Boston to San Francisco. Price data was last updated on December 20, 2025.

Travelers seeking maximum savings on their Boston to San Francisco flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

The best insider tips for Boston to San Francisco flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Boston to San Francisco trip
Airlines
United Airlines

Basic Economy allows a personal item only; no carry-on bags unless exceptions apply.


United Economy Plus offers extra legroom seats at the front of the economy cabin.

Read more about United AirlinesBy Harriet Baskas
Alaska Airlines

Alaska's Premium Class offers extra legroom and free cocktails, but snacks require purchase.


Saver Fare allows a carry-on bag, unlike many basic economy tickets.

Read more about Alaska AirlinesBy Robert Schrader
Airports
BOS

Use the FlyLogan App for real-time flight updates and pre-order meals through BOS2GO for a quicker departure experience.

Read more about BOSBy Paul Rubio
SFO

Travel from SFO to downtown San Francisco via BART for the least expensive option, taking about 40 minutes.

Read more about SFOBy Harriet Baskas
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on United Airlines and SFO

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Robert Schrader

Robert Schrader

Expert on Alaska Airlines

Robert Schrader

Robert Schrader

One of the web's original travel bloggers, Robert launched his first site Leave Your Daily Hell in 2009. Since then, he's expanded into destination niche sites (one each for Japan, Thailand and Taiwan), in addition to having written for the inflight magazines of Singapore Airlines and Korean Air. Overall, he's visited nearly 100 countries, and flies business as often as possible.

Read more
Paul Rubio

Paul Rubio

Expert on BOS

Paul Rubio

Paul Rubio

Travel journalist and photographer Paul Rubio is a Miami native (and current resident), who has lived in nine countries and traveled to 137. He is an expert in luxury travel, eco-travel, loyalty programs, hotels, airports and airlines. He is a contributing editor at AFAR, Condé Nast Traveler, LUXURY Magazine, and Palm Beach Illustrated.

Read more

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated December 23, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and Hawaiian Airlines from Boston to San Francisco to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,517 reviews

Entertainment

7.0

Food

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Alaska Airlines
8.0
Very good
11,517 reviews
Alaska Airlines
8.0
Very good
11,517 reviews

Entertainment

7.0

Food

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Delta
7.9
Good
8,015 reviews
Alaska Airlines
8.0
Very good
11,517 reviews

Entertainment

7.0

Food

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Hawaiian Airlines
7.8
Good
2,820 reviews
Alaska Airlines
8.0
Very good
11,517 reviews

Entertainment

7.0

Food

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
United Airlines
7.4
Good
9,109 reviews
Alaska Airlines
8.0
Very good
11,517 reviews

Entertainment

7.0

Food

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
JetBlue
7.2
Good
2,898 reviews
Alaska Airlines
8.0
Very good
11,517 reviews

Entertainment

7.0

Food

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.

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?

    If you book a flight from Boston to San Francisco, you will be flying from Logan Intl to San Francisco. Flights to San Francisco (SFO) from Boston Logan Intl (BOS) take 6h 27m for a nonstop flight. There are 33 flights from Logan Intl to San Francisco per day from 9 airlines.

  • How popular is this Boston to San Francisco flight route?

    Flights from Boston Logan Intl to San Francisco have been viewed 82 times in the past calendar month.

  • How long is the flight from Boston to San Francisco?

    For as low as $237, JetBlue can have you in San Francisco from Boston in 6h 53m. The distance between Boston and San Francisco is about 2696 mi. This flight may include one or multiple stops.

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

    According to our current data, Frontier ($90), Hawaiian Airlines ($129), and Delta ($138) offers the cheapest pricing from Boston to San Francisco. Frontier is currently priced 75% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Boston to San Francisco one-way?

    One-way options have recently been found by users for as low as $72 on Frontier. Other airlines that offer cheap prices include Alaska Airlines from $113 and JetBlue from $113 one-way.

  • 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: China Eastern (100%), Air China (89%), Korean Air (88%).

  • What are the cheapest flights from Boston to San Francisco?

    On average you can expect to pay $999 for a flight from Boston to San Francisco. The cheapest flight overall is $120 while the most popular route, (Boston Logan Intl - San Francisco) is currently priced at $190.

  • 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, March is the cheapest month in which you can book a flight from Boston to San Francisco (average of $103). Flying from Boston to San Francisco in May is currently the most expensive (average of $179). 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

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Roseville
South San Francisco
Santa Cruz
Livermore
Turlock
Manteca
Watsonville
Redwood City
Sunnyvale
San Bruno
Daly City
Santa Clara
San Carlos
Vallejo
Hollister
San Ramon
Foster City
Union City
Davis
Emeryville

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Top 9 airlines flying from Boston to San Francisco

Discover the top 9 airlines that operate flights from Boston to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$92Average$222FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$129Average$324FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$153Average$384FlexibilityNo cancel feeOn-time63%
DeltaCheapest$194Average$368FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$198Average$357FlexibilityNo cancel feeOn-time62%
Sun Country AirCheapest$202Average$355FlexibilityNo cancel feeOn-time83%
United AirlinesCheapest$228Average$408FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$236Average$364FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$256Average$427FlexibilityNo cancel feeOn-time71%

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