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$149+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BOS
May 17 — May 241
Sun 5/17
Sun 5/24
1 adult, Economy
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Find cheap flights from San Francisco to Boston 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

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3. Compare prices and book

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Cheapflights Tip: The best prices from San Francisco to Boston Logan Intl are usually found in January or September, booked 72 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap 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 April 17, 2026.

This Alaska Airlines deal was found by Cheapflights users on 4/12. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:16 am
SFO
-
BOS
1 stop20h 28m
Alaska Airlines
Wed 6/38:05 am
BOS
-
SFO
1 stop11h 56m
Alaska Airlines
Deal found 4/12$277
This flugladen.de deal was found by Cheapflights users on 4/13. 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.
Thu 4/303:10 pm
SFO
-
BOS
Nonstop5h 48m
Multiple Airlines
Wed 5/612:01 pm
BOS
-
SFO
1 stop10h 33m
Multiple Airlines
Deal found 4/13$278
This Expedia deal was found by Cheapflights users on 4/13. 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 4/298:45 pm
SFO
-
BOS
Nonstop5h 42m
Multiple Airlines
Sat 5/26:00 am
BOS
-
SFO
1 stop14h 34m
Multiple Airlines
Deal found 4/13$279
This Expedia deal was found by Cheapflights users on 4/13. 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.
Sat 5/210:38 pm
SFO
-
BOS
1 stop9h 47m
Frontier
Sat 5/912:01 pm
BOS
-
SFO
1 stop10h 33m
Frontier
Deal found 4/13$280
This Orbitz deal was found by Cheapflights users on 4/14. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/16:58 pm
SFO
-
BOS
1 stop8h 22m
Multiple Airlines
Tue 6/99:10 am
BOS
-
SFO
1 stop13h 16m
Multiple Airlines
Deal found 4/14$281
This Kiwi.com deal was found by Cheapflights users on 4/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/310:38 pm
SFO
-
BOS
2 stops31h 34m
Frontier
Tue 5/129:31 am
BOS
-
SFO
1 stop13h 03m
Frontier
Deal found 4/12$283
This Expedia deal was found by Cheapflights users on 4/14. 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.
Fri 5/2912:03 pm
SFO
-
BOS
Nonstop5h 47m
Multiple Airlines
Tue 6/29:12 am
BOS
-
SFO
1 stop13h 22m
Multiple Airlines
Deal found 4/14$284
This CheapOair deal was found by Cheapflights users on 4/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2910:38 pm
SFO
-
BOS
1 stop9h 47m
Multiple Airlines
Tue 5/56:20 am
BOS
-
SFO
Nonstop6h 45m
Multiple Airlines
Deal found 4/14$285
This Expedia deal was found by Cheapflights users on 4/14. 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 4/2910:38 pm
SFO
-
BOS
1 stop9h 47m
Frontier
Sun 5/36:00 am
BOS
-
SFO
1 stop14h 34m
Frontier
Deal found 4/14$286
This Expedia deal was found by Cheapflights users on 4/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/94:44 pm
SFO
-
BOS
1 stop10h 00m
Multiple Airlines
Tue 6/166:35 am
BOS
-
SFO
Nonstop6h 31m
Multiple Airlines
Deal found 4/15$287
This Frontier deal was found by Cheapflights users on 4/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/3010:38 pm
SFO
-
BOS
1 stop10h 09m
Frontier
Wed 5/612:01 pm
BOS
-
SFO
1 stop10h 33m
Frontier
Deal found 4/13$288
This CheapOair deal was found by Cheapflights users on 4/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/283:10 pm
SFO
-
BOS
Nonstop5h 48m
Multiple Airlines
Tue 6/29:12 am
BOS
-
SFO
1 stop13h 22m
Multiple Airlines
Deal found 4/14$289

Find 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 April 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$277
(Alaska Airlines)

One-way from

$149
(Delta)

Popular in

December

Cheapest in

January

Average price

$447

Good round-trip deal

$386 or less

Good one-way deal

$199 or less
Provider with most accurate pricing for San Francisco-Boston Logan Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Francisco-Boston Logan Intl flights.
Search Deals
From San Francisco to Boston Logan Intl
Search Deals
One-way flight from San Francisco to Boston Logan Intl
Search Deals
High demand for flights, 2% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from San Francisco to Boston Logan Intl.
Search Deals
Price to beat on a one-way flight from San Francisco to Boston Logan Intl.
Search Deals

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 April 17, 2026.
Use the filters below to find and compare flights from San Francisco to Boston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 8/12

12:20 pm-9:11 pm

Nonstop5h 51m

Boston Logan Intl

Wed 8/26

10:00 am-1:57 pm

Nonstop6h 57m

$297
Quickest round-trip

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 7/7

12:20 pm-9:02 pm

Nonstop5h 42m

Boston Logan Intl

Wed 7/15

7:20 am-10:51 am

Nonstop6h 31m

$297

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Thu 5/28

6:16 am-5:44 am

1 stop20h 28m

Boston Logan Intl

Thu 6/4

8:05 am-3:01 pm

1 stop9h 56m

$327

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 5/5

3:10 pm-11:58 pm

Nonstop5h 48m

Boston Logan Intl

Wed 5/6

8:21 pm-11:59 pm

Nonstop6h 38m

$347

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 5/29

8:10 am-5:04 pm

Nonstop5h 54m

Boston Logan Intl

Sun 5/31

8:05 pm-1:42 am

1 stop8h 37m

$357

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 9/29

10:33 am-11:57 pm

1 stop10h 24m

Boston Logan Intl

Thu 10/29

7:20 am-3:49 pm

1 stop11h 29m

$363

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 5/5

7:15 am-11:59 pm

2 stops13h 44m

Boston Logan Intl

Mon 6/1

6:40 pm-5:01 pm

1 stop25h 21m

$368

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 8/21

7:45 pm-9:55 am

2 stops11h 10m

Boston Logan Intl

Mon 8/24

7:40 am-1:00 pm

1 stop8h 20m

$407

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 9/25

12:20 pm-9:11 pm

Nonstop5h 51m

Boston Logan Intl

Tue 9/29

6:35 am-5:26 pm

1 stop13h 51m

$407

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 5/9

1:00 pm-9:50 pm

Nonstop5h 50m

Boston Logan Intl

Tue 5/19

8:59 pm-12:32 am

Nonstop6h 33m

$407

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/12

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
3

Compare providers for flights from San Francisco to Boston

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 San Francisco to Boston in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
CheapOairPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*2 stars
Trip.comPrice Accuracy1 starTrust 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 San Francisco-Boston flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Francisco-Boston flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Francisco-Boston flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Francisco-Boston flights, Cheapflights users trust FlightHub the most. FlightHub 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 San Francisco-Boston 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 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 April 10, 2026.

The best time to book flights from San Francisco to Boston is 72 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 $337). Flying from San Francisco to Boston in December is currently the most expensive (average of $467). 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 April 17, 2026.

It’s typically best to fly out from San Francisco to Boston in the afternoon. Doing so could potentially save you 12% 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 April 11, 2026.

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. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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

The best insider tips for San Francisco to Boston 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 San Francisco to Boston trip
Our travel experts
Paul Rubio

Paul Rubio

Expert on BOS

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 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

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 April 17, 2026.
Read reviews from past customers who have flown Alaska Airlines,Delta, andHawaiian Airlines 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
7.9
Good
12,253 reviews

Boarding

8.1

Food

7.0

Comfort

7.8

Overall

7.9

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.
Alaska Airlines
7.9
Good
12,253 reviews
Alaska Airlines
7.9
Good
12,253 reviews

Boarding

8.1

Food

7.0

Comfort

7.8

Overall

7.9

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.
Delta
7.9
Good
8,406 reviews
Alaska Airlines
7.9
Good
12,253 reviews

Boarding

8.1

Food

7.0

Comfort

7.8

Overall

7.9

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.
Hawaiian Airlines
7.8
Good
2,838 reviews
Alaska Airlines
7.9
Good
12,253 reviews

Boarding

8.1

Food

7.0

Comfort

7.8

Overall

7.9

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.
United Airlines
7.4
Good
9,602 reviews
Alaska Airlines
7.9
Good
12,253 reviews

Boarding

8.1

Food

7.0

Comfort

7.8

Overall

7.9

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.
JetBlue
7.2
Good
2,939 reviews
Alaska Airlines
7.9
Good
12,253 reviews

Boarding

8.1

Food

7.0

Comfort

7.8

Overall

7.9

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.

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 34m on average. When it comes time to book airfare, you have a few options: there are 30 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 50 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    For as low as $347, Delta can have you in Boston from San Francisco in 5h 48m. San Francisco and Boston are separated by a distance of 2696 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Currently priced at $100, Frontier will fly you from San Francisco to Boston and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Hawaiian Airlines and Delta - these airlines can fly you to your destination from $129 and $154, respectively. Frontier is 75% 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 Frontier, which is currently one of the cheapest options available, starting at $85. Alaska Airlines flights start at $118 while deals on Hawaiian Airlines start at $118 one-way.

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

    Consider EL AL (100%), Etihad Airways (100%) or Scandinavian Airlines (98%) 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 $148. While the most popular route (San Francisco - Boston Logan Intl) can be booked for $249 on average, our data indicates $994 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 $337). Flying from San Francisco to Boston in December is currently the most expensive (average of $467). 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
Medford
Cambridge
Concord
Hampton Beach
Watertown
Brockton
Seekonk
Cranston
Chelsea
Seabrook
Warwick
Peabody
York Beach
Londonderry
Swansea
Old Orchard Beach
Lincoln
Quincy
Waltham
Lowell

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.

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 April 17, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$100Average$208FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$129Average$334FlexibilityNo cancel feeOn-time85%
DeltaCheapest$154Average$396FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$177Average$389FlexibilityNo cancel feeOn-time62%
Sun Country AirCheapest$179Average$366FlexibilityNo cancel feeOn-time83%
SouthwestCheapest$205Average$402FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$221Average$462FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$233Average$396FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$266Average$401FlexibilityNo cancel feeOn-time71%

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