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$134+ Cheap flights from San Francisco to Boston (SFO - BOS)

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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BOS
Jul 21 — Jul 281
Mon 7/21
Mon 7/28
1 adult, Economy
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Cheapflights Tip: The best prices from San Francisco to Boston Logan Intl are usually found in January or February, booked 64 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from San Francisco to Boston

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Boston (BOS). 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 July 16, 2025.

Round-trip from

$256
(Alaska Airlines)

One-way from

$134
(Southwest)

Popular in

December

Cheapest in

January

Average price

$431

Good round-trip deal

$334 or less

Good one-way deal

$183 or less
From San Francisco to Boston Logan Intl
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One-way flight from San Francisco to Boston Logan Intl
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Highest demand for flights based on searches. 1% potential increase in price ($5 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from San Francisco to Boston Logan Intl.
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Price to beat on a one-way flight from San Francisco to Boston Logan Intl.
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Find flight deals from San Francisco to Boston

Cheapest flights from San Francisco to Boston
Explore the most affordable flight options available from San Francisco to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 16, 2025.

This Alaska Airlines deal was found by Cheapflights users on 7/16. 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.
Tue 11/1811:40 amSFO - BOS
1 stop9h 40mAlaska Airlines
Wed 11/196:23 pmBOS - SFO
1 stop19h 21mAlaska Airlines
Deal found 7/16$256
This American Airlines deal was found by Cheapflights users on 7/15. 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 8/146:05 amSFO - BOS
1 stop7h 51mAmerican Airlines
Thu 8/216:00 pmBOS - SFO
1 stop8h 18mAmerican Airlines
Deal found 7/15$257
This JetBlue deal was found by Cheapflights users on 7/15. 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.
Fri 9/52:08 pmSFO - BOS
Nonstop5h 47mJetBlue
Sun 9/76:15 amBOS - SFO
Nonstop6h 35mJetBlue
Deal found 7/15$259
This Southwest deal was found by Cheapflights users on 7/15. 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.
Fri 8/2211:25 amSFO - BOS
1 stop8h 35mSouthwest
Tue 8/267:05 amBOS - SFO
1 stop10h 35mSouthwest
Deal found 7/15$268
This Hawaiian Airlines deal was found by Cheapflights users on 7/16. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/189:28 pmSFO - BOS
Nonstop5h 42mHawaiian Airlines
Sun 8/316:00 amBOS - SFO
1 stop9h 25mHawaiian Airlines
Deal found 7/16$272
This United Airlines deal was found by Cheapflights users on 7/15. 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 8/63:15 pmSFO - BOS
Nonstop5h 44mUnited Airlines
Tue 8/127:12 pmBOS - SFO
1 stop8h 45mUnited Airlines
Deal found 7/15$274
This Delta deal was found by Cheapflights users on 7/16. 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.
Mon 8/410:00 pmSFO - BOS
Nonstop5h 40mDelta
Wed 8/206:15 amBOS - SFO
1 stop19h 56mDelta
Deal found 7/16$285

Cheapflights Fare Finder

Customize your flight search to find flights from San Francisco to Boston 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 July 16, 2025.
Use the filters below to find and compare flights from San Francisco to Boston that are best for you.

Fly from

San Francisco

Fly to

Boston

Route

Depart

Return

Price

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 8/15

5:15 am-4:04 pm

1 stop7h 49m

Boston Logan Intl

Mon 8/18

5:54 am-11:15 am

1 stop8h 21m

$257

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 8/12

7:20 am-4:01 pm

Nonstop5h 41m

Boston Logan Intl

Wed 8/20

7:45 am-1:12 pm

1 stop8h 27m

$258

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Thu 9/4

6:20 am-3:08 pm

Nonstop5h 48m

Boston Logan Intl

Sun 9/7

6:02 am-9:33 am

Nonstop6h 31m

$259

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 9/5

2:08 pm-10:55 pm

Nonstop5h 47m

Boston Logan Intl

Sun 9/7

6:15 am-9:50 am

Nonstop6h 35m

$260

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 8/22

11:25 am-11:00 pm

1 stop8h 35m

Boston Logan Intl

Tue 8/26

7:05 am-2:40 pm

1 stop10h 35m

$268

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 8/18

9:28 pm-6:10 am

Nonstop5h 42m

Boston Logan Intl

Sun 8/31

6:00 am-12:25 pm

1 stop9h 25m

$272

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 8/19

7:05 am-3:54 pm

Nonstop5h 49m

Boston Logan Intl

Fri 8/22

4:59 pm-8:45 pm

Nonstop6h 46m

$293

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 9/3

5:55 am-7:10 pm

2 stops10h 15m

$134

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 8/4

6:50 pm-7:33 am

1 stop9h 43m

$135

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 9/2

6:00 am-5:55 pm

1 stop8h 55m

$138

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/15

Showing 1-10 of 17 results
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The best insider tips for San Francisco to Boston 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 San Francisco to Boston trip
Airports
SFO

Save time at SFO by using the AirTrain Red Line to quickly navigate between terminals after clearing security.

Read more about SFOby Harriet Baskas
BOS

For a scenic arrival, consider the water taxi from BOS to Boston’s Long Wharf or Seaport District.

Read more about BOSby Paul Rubio
Our travel experts
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
Harriet Baskas

Harriet Baskas

Expert on 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

Best time to book a flight from San Francisco to Boston

Have a flexible travel schedule? Discover the best time to fly to Boston from San Francisco 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 San Francisco to Boston

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

Use this chart to determine the optimal time to book a round-trip flight from San Francisco to Boston. Price data was last updated on July 11, 2025.

The best time to book flights from San Francisco to Boston is 64 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from San Francisco to Boston (average of $218). Flying from San Francisco to Boston in July is currently the most expensive (average of $307). 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 SFO to BOS?

Find hourly flight availability from San Francisco to Boston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 16, 2025.

It’s typically best to fly out from San Francisco to Boston in the afternoon. Doing so could potentially save you 23% on the flight price compared to flying in the morning, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from San Francisco to Boston. Price data was last updated on July 13, 2025.

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

Weekly flight availability from San Francisco to Boston

Explore weekly flight availability from San Francisco to Boston. 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 July 16, 2025.

The most flights from SFO to BOS are scheduled on a Monday (63 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (45 on average).

Reviews of airlines servicing Boston

Get insights into the airlines that provide service to Boston. 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 Boston. Reviews last updated July 16, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta from San Francisco to Boston. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Entertainment

7.1

Food

7.1

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

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Entertainment

7.1

Food

7.1

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
4,241 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Entertainment

7.1

Food

7.1

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
7,957 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,580 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Entertainment

7.1

Food

7.1

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
8,863 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Entertainment

7.1

Food

7.1

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 San Francisco to Boston. 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 San Francisco to Boston?

    To fly from San Francisco to Boston, you need to book a flight from San Francisco (SFO) to Logan Intl (BOS). Nonstop flights to Boston Logan Intl from San Francisco take 5h 27m on average. When it comes time to book airfare, you have a few options: there are 57 outbound flights from San Francisco to Logan Intl offered by 9 different airlines.

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

    The San Francisco to Boston Logan Intl flight path was viewed by 41 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    Currently priced at $256, Alaska Airlines will fly you from San Francisco to Boston and back. In addition to Alaska Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and United Airlines - these airlines can fly you to your destination from $257 and $259, respectively. Alaska Airlines is 31% cheaper than the average price of flights available within the next 90 days to this destination.

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

    To fly one-way, consider booking your trip with Southwest, which is currently one of the cheapest options available, starting at $134. United Airlines flights start at $135 while deals on Hawaiian Airlines start at $139 one-way.

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

    Consider Etihad Airways (95%), Scandinavian Airlines (89%) or Air China (88%) when booking your flight. These represent the most reliable airlines when flying from San Francisco to Boston.

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

    Looking at all options, your cheapest flight can be booked for $129. While the most popular route (San Francisco - Boston Logan Intl) can be booked for $231 on average our data indicates $886 when flying from San Francisco to Boston.

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

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

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

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Boston.

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

    Yes. Cheapflights offers flight deals from San Francisco to Boston 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 San Francisco to Boston?

    Currently, January is the cheapest month in which you can book a flight from San Francisco to Boston (average of $218). Flying from San Francisco to Boston in July is currently the most expensive (average of $307). 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
Cambridge
Medford
Watertown
Warwick
Seabrook
Waltham
Framingham
Lowell
Smithfield
Cranston
Randolph
Chestnut Hill
Brockton
York Beach
Chelsea
Saco
Burlington
Hampton Beach
Swansea
Lincoln

Browse thousands of different options on Cheapflights for your next trip

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Top 9 airlines flying from San Francisco to Boston

Discover the top 9 airlines that operate flights from San Francisco to Boston. 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 July 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$110Average$200FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$144Average$364FlexibilityNo cancel feeOn-time85%
American AirlinesCheapest$155Average$389FlexibilityNo cancel feeOn-time71%
Sun Country AirCheapest$160Average$410FlexibilityNo cancel feeOn-time83%
DeltaCheapest$163Average$370FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$196Average$368FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$227Average$447FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$229Average$417FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$267Average$466FlexibilityNo cancel feeOn-time63%

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