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Cheap flights from San Francisco to Boston (SFO - BOS) - Compare and Save

SFO — BOS
Jul 9 — Jul 161
Wed 7/9
Wed 7/16
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 4, 2025.

Round-trip from

$258
(Alaska Airlines)

One-way from

$139
(Hawaiian Airlines)

Popular in

June

Cheapest in

January

Average price

$421

Good round-trip deal

$339 or less

Good one-way deal

$184 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. 11% potential increase in price ($49 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 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 4, 2025.

This Alaska Airlines deal was found by Cheapflights users on 7/2. 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 8/127:20 amSFO - BOS
Nonstop5h 41mAlaska Airlines
Mon 8/185:45 pmBOS - SFO
1 stop9h 05mAlaska Airlines
Deal found 7/2$258
This JetBlue deal was found by Cheapflights users on 7/3. 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 8/256:05 amSFO - BOS
Nonstop5h 45mJetBlue
Thu 9/46:15 amBOS - SFO
Nonstop6h 35mJetBlue
Deal found 7/3$259
This JetBlue deal was found by Cheapflights users on 7/2. 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 8/911:25 pmSFO - BOS
Nonstop5h 38mJetBlue
Fri 8/159:16 pmBOS - SFO
Nonstop6h 42mJetBlue
Deal found 7/2$261
This Southwest deal was found by Cheapflights users on 7/3. 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 8/195:15 amSFO - BOS
2 stops10h 55mSouthwest
Sat 8/235:50 amBOS - SFO
1 stop8h 00mSouthwest
Deal found 7/3$262
This JetBlue deal was found by Cheapflights users on 7/3. 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 8/1611:25 pmSFO - BOS
Nonstop5h 38mJetBlue
Sat 8/236:05 amBOS - SFO
Nonstop6h 38mJetBlue
Deal found 7/3$263
This JetBlue deal was found by Cheapflights users on 7/3. 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 8/166:05 amSFO - BOS
Nonstop5h 45mJetBlue
Thu 8/211:59 pmBOS - SFO
1 stop12h 44mJetBlue
Deal found 7/3$266
This Alaska Airlines deal was found by Cheapflights users on 7/3. 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 9/1610:08 amSFO - BOS
1 stop11h 19mAlaska Airlines
Fri 9/265:08 pmBOS - SFO
1 stop9h 51mAlaska Airlines
Deal found 7/3$267
This Alaska Airlines deal was found by Cheapflights users on 7/3. 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 9/36:10 amSFO - BOS
Nonstop5h 50mAlaska Airlines
Sun 9/76:00 amBOS - SFO
1 stop9h 25mAlaska Airlines
Deal found 7/3$268
This Alaska Airlines deal was found by Cheapflights users on 7/3. 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.
Mon 8/189:28 pmSFO - BOS
Nonstop5h 42mAlaska Airlines
Thu 8/215:08 pmBOS - SFO
1 stop9h 51mAlaska Airlines
Deal found 7/3$269
This American Airlines deal was found by Cheapflights users on 7/3. 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.
Fri 8/2212:15 pmSFO - BOS
1 stop8h 33mAmerican Airlines
Wed 8/275:54 amBOS - SFO
1 stop8h 21mAmerican Airlines
Deal found 7/3$270
This Alaska Airlines deal was found by Cheapflights users on 7/2. 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 8/199:28 pmSFO - BOS
Nonstop5h 42mAlaska Airlines
Tue 8/267:20 amBOS - SFO
1 stop9h 26mAlaska Airlines
Deal found 7/2$272
This Delta deal was found by Cheapflights users on 7/3. 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.
Tue 8/197:05 amSFO - BOS
Nonstop5h 49mDelta
Thu 9/47:55 amBOS - SFO
Nonstop6h 41mDelta
Deal found 7/3$273

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 4, 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

Tue 8/12

7:20 am-4:01 pm

Nonstop5h 41m

Boston Logan Intl

Mon 8/18

5:45 pm-11:50 pm

1 stop9h 05m

$258

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 8/25

6:05 am-2:50 pm

Nonstop5h 45m

Boston Logan Intl

Fri 9/5

5:50 pm-9:24 pm

Nonstop6h 34m

$259

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 8/9

11:25 pm-8:03 am

Nonstop5h 38m

Boston Logan Intl

Fri 8/15

9:16 pm-12:58 am

Nonstop6h 42m

$261

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 8/19

11:40 pm-8:18 am

Nonstop5h 38m

Boston Logan Intl

Tue 9/2

9:16 pm-12:58 am

Nonstop6h 42m

$262

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 8/16

11:25 pm-8:03 am

Nonstop5h 38m

Boston Logan Intl

Sat 8/23

6:05 am-9:43 am

Nonstop6h 38m

$263

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 8/16

6:05 am-2:50 pm

Nonstop5h 45m

Boston Logan Intl

Thu 8/21

1:59 pm-11:43 pm

1 stop12h 44m

$266

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 9/16

8:00 am-12:27 am

1 stop13h 27m

Boston Logan Intl

Thu 9/25

5:08 pm-11:59 pm

1 stop9h 51m

$267

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 9/3

6:10 am-3:00 pm

Nonstop5h 50m

Boston Logan Intl

Sun 9/7

6:00 am-12:25 pm

1 stop9h 25m

$268

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 8/18

9:28 pm-6:10 am

Nonstop5h 42m

Boston Logan Intl

Thu 8/21

5:08 pm-11:59 pm

1 stop9h 51m

$269

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 8/22

12:15 pm-11:48 pm

1 stop8h 33m

Boston Logan Intl

Wed 8/27

5:54 am-11:15 am

1 stop8h 21m

$270

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

Showing 1-10 of 60 results
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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 June 27, 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 June is currently the most expensive (average of $306). 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 4, 2025.

It’s typically best to fly out from San Francisco to Boston in the afternoon. Doing so could potentially save you 22% 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 June 29, 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 4, 2025.

The most flights from SFO to BOS are scheduled on a Wednesday (50 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (36 on average).

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

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 4, 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

Overall

8.0

Crew

8.5

Boarding

8.1

Food

7.1

Entertainment

7.1

Comfort

7.8

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

Overall

8.0

Crew

8.5

Boarding

8.1

Food

7.1

Entertainment

7.1

Comfort

7.8

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
4,265 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Food

7.1

Entertainment

7.1

Comfort

7.8

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
7,970 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Food

7.1

Entertainment

7.1

Comfort

7.8

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
2,543 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Food

7.1

Entertainment

7.1

Comfort

7.8

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
8,845 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Food

7.1

Entertainment

7.1

Comfort

7.8

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 43 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 $258, 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 JetBlue and American Airlines - these airlines can fly you to your destination from $259 and $270, 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 Hawaiian Airlines, which is currently one of the cheapest options available, starting at $139. Southwest flights start at $140 while deals on American Airlines start at $141 one-way.

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

    Consider Etihad Airways (94%), American Airlines (86%) or Qatar Airways (83%) 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 $232 on average our data indicates $905 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 June is currently the most expensive (average of $306). 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
Cambridge
Medford
Watertown
Warwick
Seabrook
Waltham
Framingham
Cranston
Randolph
Chestnut Hill
Chelsea
Brockton
York Beach
Saco
Burlington
West Yarmouth
Smithfield
Swansea
Lincoln
Quincy

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Francisco to Boston

See prices for flight routes from nearby airports that may be better suited for you.
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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 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$110Average$200FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$143Average$388FlexibilityNo cancel feeOn-time71%
Hawaiian AirlinesCheapest$144Average$364FlexibilityNo cancel feeOn-time85%
Sun Country AirCheapest$160Average$395FlexibilityNo cancel feeOn-time83%
DeltaCheapest$161Average$370FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$196Average$367FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$227Average$447FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$228Average$415FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$273Average$471FlexibilityNo cancel feeOn-time63%

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