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Cheap flights from San Francisco to Boston from $206

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 13/11. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BOS
16 Nov — 23 Nov1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from San Francisco to Boston Logan Intl are usually found in January or February, booked 69 days in advance, depart on a Monday or Tuesday and return on a Thursday

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 17 October 2025.

Round-trip from

$356

One-way from

$206

Popular in

June

Cheapest in

January

Average price

$604
Alaska Airlines
  • Alaska Airlines
  • 5/11-5/11
  • Nonstop
  • 12h 32m total
  • San Francisco to Boston
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Southwest
  • Southwest
  • 24/2
  • 2 total stops
  • 11h 45m total
  • San Francisco to Boston
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Highest demand for flights based on searches. 9% potential increase in price ($94 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease ($15 potential savings vs. average return price).
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Average for round-trip flights in October 2025
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Find flight deals from San Francisco to Boston

Enter your travel dates to find the best prices.

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 17 October 2025.

Wed 5/1107:00SFO - BOS
Nonstop5h 41mAlaska Airlines
Wed 5/1118:59BOS - SFO
Nonstop6h 51mAlaska Airlines
Deal found 15/10$356
Tue 4/1108:15SFO - BOS
Nonstop5h 32mJetBlue
Tue 4/1120:12BOS - SFO
Nonstop6h 47mJetBlue
Deal found 16/10$357
Wed 5/1107:00SFO - BOS
Nonstop5h 42mDelta
Fri 7/1119:55BOS - SFO
Nonstop6h 46mDelta
Deal found 17/10$365
Wed 12/1107:00SFO - BOS
Nonstop5h 35mDelta
Thu 20/1120:05BOS - SFO
Nonstop6h 54mDelta
Deal found 17/10$370
Wed 5/1111:40SFO - BOS
1 stop9h 40mAlaska Airlines
Mon 17/1118:59BOS - SFO
Nonstop6h 51mAlaska Airlines
Deal found 17/10$380
Mon 17/1115:01SFO - BOS
1 stop21h 23mAlaska Airlines
Thu 20/1118:59BOS - SFO
Nonstop6h 51mAlaska Airlines
Deal found 17/10$385
Wed 12/1111:40SFO - BOS
1 stop9h 40mAlaska Airlines
Sat 15/1116:24BOS - SFO
1 stop19h 26mAlaska Airlines
Deal found 16/10$394
Wed 5/1107:00SFO - BOS
Nonstop5h 42mDelta
Mon 17/1120:05BOS - SFO
Nonstop6h 54mDelta
Deal found 15/10$396
Wed 26/1113:00SFO - BOS
Nonstop5h 38mUnited Airlines
Wed 3/1206:00BOS - SFO
Nonstop6h 45mUnited Airlines
Deal found 16/10$397
Mon 17/1107:00SFO - BOS
Nonstop5h 34mDelta
Thu 20/1120:05BOS - SFO
Nonstop6h 54mDelta
Deal found 15/10$400
Sat 8/1107:00SFO - BOS
Nonstop5h 41mAlaska Airlines
Sat 8/1118:59BOS - SFO
Nonstop6h 51mAlaska Airlines
Deal found 16/10$403

Cheapflights Fare Finder

 
Customise 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 647,157 searches. Data last updated 17 October 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 14/11

07:00-15:41

Nonstop5h 41m

Boston Logan Intl

Fri 21/11

19:33-23:20

Nonstop6h 47m

$370

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 15/11

07:00-15:41

Nonstop5h 41m

Boston Logan Intl

Tue 18/11

07:00-13:50

1 stop9h 50m

$380

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 5/11

08:00-00:20

1 stop13h 20m

Boston Logan Intl

Tue 11/11

18:59-22:50

Nonstop6h 51m

$380

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 6/3

23:59-08:32

Nonstop5h 33m

Boston Logan Intl

Tue 10/3

06:00-09:55

Nonstop6h 55m

$396

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 17/1

12:30-22:55

1 stop7h 25m

Boston Logan Intl

Tue 20/1

16:50-22:20

1 stop8h 30m

$396

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 15/11

21:10-05:44

Nonstop5h 34m

Boston Logan Intl

Mon 17/11

20:12-23:59

Nonstop6h 47m

$396

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 11/3

23:20-07:58

Nonstop5h 38m

Boston Logan Intl

Sun 15/3

07:55-11:53

Nonstop6h 58m

$397

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 8/11

07:00-15:41

Nonstop5h 41m

Boston Logan Intl

Sat 8/11

18:59-22:50

Nonstop6h 51m

$403

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 7/11

12:30-21:10

Nonstop5h 40m

Boston Logan Intl

Mon 10/11

20:05-23:59

Nonstop6h 54m

$411

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 10/12

06:00-16:54

1 stop7h 54m

Boston Logan Intl

Fri 12/12

08:00-11:52

Nonstop6h 52m

$411

Flights are sorted by cheapest return flights first.

Deals found on 17/10

Showing 1-10 of 23 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 return 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 return flight from San Francisco to Boston. Price data was last updated on 10 October 2025.

The best time to book flights from San Francisco to Boston is 69 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, February is the cheapest month in which you can book a flight from San Francisco to Boston (average of $183). Flying from San Francisco to Boston in June is currently the most expensive (average of $336). 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 17 October 2025.

It’s optimal to fly from San Francisco to Boston in the afternoon. By choosing this option you can save up to 76% on the cost of your flight, compared to a flight at midday.

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.

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

    The San Francisco to Boston Logan Intl flight path was viewed by 7 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?

    Airlines like Alaska Airlines, Delta, and JetBlue fly from San Francisco to Boston in about 5h 33m. The time it takes to get you to your destination is usually consistent. Airlines will cover a distance of 4339 km. Most flights are nonstop.

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

    The cheapet airlines for a one-way flight from San Francisco to Boston are Alaska Airlines ($206), United Airlines ($214), and JetBlue ($214).

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

    No one likes to see their flight delayed. When booking a flight from San Francisco to Boston consider choosing Etihad Airways(98%), Air China(94%) or ANA(87%), as they are the most reliable in getting you off to your destination on time.

  • 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 holiday 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, February is the cheapest month in which you can book a flight from San Francisco to Boston (average of $183). Flying from San Francisco to Boston in June is currently the most expensive (average of $336). 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

Travelling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Revere
Cambridge

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Francisco to Boston

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Los Angeles to Boston flights

Fly with Cheapflights

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How does Cheapflights help users find flights from San Francisco to Boston?

When you search for this flight from San Francisco to Boston, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from San Francisco to Boston?

Millions of users choose and trust Cheapflights to book the best flight deals from San Francisco to Boston for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from San Francisco to Boston with no change fees?

Certainly. Search results for flights to Boston from San Francisco shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from San Francisco to Boston become cheaper?

Yes, Cheapflights offers price alerts on San Francisco to Boston flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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