HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Francisco

$130+ 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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SFO
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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 September or January, booked 56 days in advance, depart on a Wednesday or Thursday and return on a Tuesday

Cheap 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 June 12, 2025.

Round-trip from

$246
(SmartFares)

One-way from

$130
(Delta)

Popular in

December

Cheapest in

September

Average price

$388

Good round-trip deal

$299 or less

Good one-way deal

$179 or less
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. 3% potential increase in price ($10 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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

Find 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 June 12, 2025.

This flugladen.de deal was found by Cheapflights users on 6/11. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/248:01 amBOS - SFO
1 stop9h 00mHawaiian Airlines
Sat 11/157:00 amSFO - BOS
Nonstop5h 41mHawaiian Airlines
Deal found 6/11$243
This SmartFares deal was found by Cheapflights users on 6/10. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/37:30 amBOS - SFO
Nonstop6h 37mAlaska Airlines
Wed 7/95:51 pmSFO - BOS
1 stop10h 39mAlaska Airlines
Deal found 6/10$246
This flugladen.de deal was found by Cheapflights users on 6/11. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/28:19 pmBOS - SFO
Nonstop6h 40mMultiple Airlines
Wed 7/99:28 pmSFO - BOS
Nonstop5h 42mMultiple Airlines
Deal found 6/11$255
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/261:00 pmBOS - SFO
1 stop7h 55mSouthwest
Wed 9/38:35 amSFO - BOS
1 stop9h 10mSouthwest
Deal found 6/10$257
This Delta deal was found by Cheapflights users on 6/10. 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.
Thu 7/37:59 amBOS - SFO
Nonstop6h 46mDelta
Mon 7/710:00 pmSFO - BOS
Nonstop5h 40mDelta
Deal found 6/10$259
This JetBlue deal was found by Cheapflights users on 6/10. 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.
Sat 11/18:45 pmBOS - SFO
Nonstop6h 49mJetBlue
Tue 11/48:15 amSFO - BOS
1 stop10h 17mJetBlue
Deal found 6/10$266
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Thu 7/36:00 amBOS - SFO
Nonstop6h 28mUnited Airlines
Wed 7/99:15 pmSFO - BOS
1 stop7h 56mUnited Airlines
Deal found 6/10$269
This American Airlines deal was found by Cheapflights users on 6/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/33:05 pmBOS - SFO
1 stop9h 22mAmerican Airlines
Thu 7/1012:28 pmSFO - BOS
1 stop7h 40mAmerican Airlines
Deal found 6/12$280

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 June 12, 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

Thu 7/3

7:30 am-11:07 am

Nonstop6h 37m

San Francisco

Wed 7/9

5:51 pm-7:30 am

1 stop10h 39m

$246

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 7/3

8:19 pm-11:59 pm

Nonstop6h 40m

San Francisco

Wed 7/9

9:28 pm-6:10 am

Nonstop5h 42m

$249

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 7/2

8:19 pm-11:59 pm

Nonstop6h 40m

San Francisco

Wed 7/9

9:28 pm-6:10 am

Nonstop5h 42m

$255

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 8/26

1:00 pm-5:55 pm

1 stop7h 55m

San Francisco

Wed 9/3

8:35 am-8:45 pm

1 stop9h 10m

$257

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 7/3

7:59 am-11:45 am

Nonstop6h 46m

San Francisco

Mon 7/7

10:00 pm-6:40 am

Nonstop5h 40m

$259

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 8/7

4:05 pm-11:36 pm

1 stop10h 31m

San Francisco

Tue 8/12

1:30 pm-10:14 pm

Nonstop5h 44m

$266

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 7/3

3:05 pm-9:27 pm

1 stop9h 22m

San Francisco

Thu 7/10

12:28 pm-11:08 pm

1 stop7h 40m

$280

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Fri 7/18

8:05 am-11:36 am

Nonstop6h 31m

San Francisco

Sun 7/20

10:55 pm-9:26 am

1 stop7h 31m

$302

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 7/3

8:19 pm-11:59 pm

Nonstop6h 40m

$130

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 8/6

8:40 am-2:04 pm

1 stop8h 24m

$132

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 18 results
1
2

The best insider tips for Boston to San Francisco flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
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

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 June 9, 2025.

To ensure you get the cheapest price possible for a flight from Boston to San Francisco, you should look to book at least 56 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 $276). Flying from Boston to San Francisco in June is currently the most expensive (average of $364). 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 June 12, 2025.

It’s typically best to fly out from Boston to San Francisco in the evening. Doing so could potentially save you 42% 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 June 8, 2025.

Travelers seeking maximum savings on their Boston to San Francisco flight should consider departing on Tuesday 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.

Weekly flight availability from Boston to San Francisco

Explore weekly flight availability from Boston to San Francisco. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 12, 2025.

The most flights from BOS to SFO are scheduled on a Thursday (63 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (32 on average).

Rainfall in San Francisco by month

Plan your trip to San Francisco by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

Temperature in San Francisco by month

Plan your trip to San Francisco by taking into account the average temperature totals by month.

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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

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 June 12, 2025.
To help decide which airline to fly from Boston to San Francisco, see what other customers have to say about Alaska Airlines, Southwest and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 28m for a nonstop flight. There are 49 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 72 times in the past calendar month.

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

    According to our current data, Alaska Airlines ($246), Hawaiian Airlines ($249), and Southwest ($257) offers the cheapest pricing from Boston to San Francisco. Alaska Airlines is currently priced 30% 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 $130 on Delta. Other airlines that offer cheap prices include Alaska Airlines from $132 and Southwest from $133 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: Qantas Airways (100%), Air China (92%), ANA (90%).

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

    On average you can expect to pay $1,263 for a flight from Boston to San Francisco. The cheapest flight overall is $129 while the most popular route, (Boston Logan Intl - San Francisco) is currently priced at $237.

  • 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 $276). Flying from Boston to San Francisco in June is currently the most expensive (average of $364). 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 Boston?

Book flights to Boston if you plan to visit one of these locations
Roseville
Mountain View
South San Francisco
Livermore
Turlock
Santa Cruz
Manteca
Fairfield
Watsonville
Antioch
Hollister
Milpitas
Newark
Hayward
Alameda
Sunnyvale
Daly City
Union City
Campbell
Capitola

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.
Boston to Los Angeles flights
Boston to Las Vegas flights
Boston to San Diego flights
Hartford to Los Angeles flights
Hartford to Las Vegas flights
Boston to Ontario flights
Boston to Santa Ana flights
Boston to Burbank flights
Hartford to San Francisco flights
Boston to Sacramento flights
Boston to San Jose flights
Albany to Las Vegas flights
Boston to Reno flights
Boston to Oakland flights
Hartford to Ontario flights
Hartford to Santa Ana flights
Hartford to San Diego flights
Boston to Santa Barbara flights
Albany to San Francisco flights
Boston to Fresno flights
Albany to Los Angeles flights
Boston to Palm Springs flights
Hartford to Burbank flights
Boston to Long Beach flights
Hartford to Sacramento flights
Boston to San Luis Obispo flights
Albany to San Diego flights
Hartford to San Jose flights
Hartford to San Luis Obispo flights
Boston to Monterey flights
Hartford to Fresno flights
Hartford to Reno flights
Albany to Sacramento flights
Albany to Fresno flights
Albany to Reno flights
Boston to Santa Rosa flights
Albany to Ontario flights
Boston to Medford flights
Albany to Santa Ana flights
Hartford to Oakland flights
Albany to Oakland flights
Albany to Burbank flights
Worcester to San Francisco flights
Albany to San Jose flights
West Tisbury to Las Vegas flights
Worcester to Los Angeles flights
Boston to Arcata flights
Hartford to Long Beach flights
Hartford to Palm Springs flights

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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$84Average$209FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$129Average$323FlexibilityNo cancel feeOn-time85%
American AirlinesCheapest$147Average$393FlexibilityNo cancel feeOn-time71%
Sun Country AirCheapest$150Average$333FlexibilityNo cancel feeOn-time83%
DeltaCheapest$166Average$358FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$196Average$348FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$226Average$380FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$227Average$406FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$271Average$401FlexibilityNo cancel feeOn-time63%

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.