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Cheap flights from San Francisco to Boston from $199

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 22/9. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BOS
20 Aug — 27 Aug1
1 adult

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 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 15 August 2025.

Round-trip from

$363

One-way from

$199

Popular in

December

Cheapest in

January

Average price

$587
Delta
  • Delta
  • 13/9-17/9
  • Nonstop
  • 12h 20m total
  • San Francisco to Boston
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Southwest
  • Southwest
  • 22/9
  • 1 total stop
  • 8h 05m total
  • San Francisco to Boston
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Highest demand for flights based on searches. 0% potential increase in price ($3 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease ($17 potential savings vs. average return price).
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Average for round-trip flights in August 2025
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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 15 August 2025.

Sat 13/907:05SFO - BOS
Nonstop5h 42mDelta
Wed 17/907:55BOS - SFO
Nonstop6h 38mDelta
Deal found 14/8$363
Sat 13/913:00SFO - BOS
Nonstop5h 47mDelta
Sat 20/907:55BOS - SFO
Nonstop6h 38mDelta
Deal found 13/8$365
Wed 29/1021:05SFO - BOS
1 stop8h 10mSouthwest
Wed 5/1117:00BOS - SFO
1 stop8h 30mSouthwest
Deal found 13/8$371
Thu 30/1010:25SFO - BOS
1 stop8h 10mSouthwest
Tue 4/1117:00BOS - SFO
1 stop8h 30mSouthwest
Deal found 14/8$373
Wed 3/921:15SFO - BOS
Nonstop5h 46mUnited Airlines
Tue 9/918:16BOS - SFO
1 stop8h 43mUnited Airlines
Deal found 13/8$379
Thu 4/907:05SFO - BOS
Nonstop5h 50mDelta
Wed 10/907:55BOS - SFO
Nonstop6h 41mDelta
Deal found 14/8$380
Wed 5/1121:25SFO - BOS
1 stop9h 20mSouthwest
Sun 9/1118:20BOS - SFO
1 stop8h 50mSouthwest
Deal found 14/8$382
Wed 19/1110:50SFO - BOS
1 stop7h 50mSouthwest
Mon 24/1106:10BOS - SFO
1 stop10h 55mSouthwest
Deal found 13/8$388
Tue 11/1121:25SFO - BOS
1 stop9h 15mSouthwest
Fri 14/1107:05BOS - SFO
2 stops11h 15mSouthwest
Deal found 13/8$390
Thu 4/907:10SFO - BOS
1 stop20h 15mAlaska Airlines
Wed 10/907:45BOS - SFO
1 stop8h 27mAlaska Airlines
Deal found 14/8$393
Sat 27/907:05SFO - BOS
Nonstop5h 42mDelta
Thu 2/1020:45BOS - SFO
Nonstop6h 36mDelta
Deal found 14/8$394

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 15 August 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

Wed 10/9

06:10-15:00

Nonstop5h 50m

Boston Logan Intl

Tue 16/9

20:23-23:52

Nonstop6h 29m

$363

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 13/9

07:05-15:47

Nonstop5h 42m

Boston Logan Intl

Wed 17/9

20:45-00:21

Nonstop6h 36m

$363

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 1/10

14:05-23:07

Nonstop6h 02m

Boston Logan Intl

Sat 4/10

20:10-23:59

Nonstop6h 49m

$363

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 23/9

15:10-23:56

Nonstop5h 46m

Boston Logan Intl

Tue 30/9

13:43-17:12

Nonstop6h 29m

$363

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 23/9

13:00-21:47

Nonstop5h 47m

Boston Logan Intl

Sat 27/9

07:55-11:33

Nonstop6h 38m

$363

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 27/9

22:00-06:39

Nonstop5h 39m

Boston Logan Intl

Tue 30/9

06:15-09:47

Nonstop6h 32m

$363

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 25/10

07:11-16:00

Nonstop5h 49m

Boston Logan Intl

Sat 25/10

20:25-00:05

Nonstop6h 40m

$363

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 10/9

07:05-15:55

Nonstop5h 50m

Boston Logan Intl

Sat 13/9

18:40-22:17

Nonstop6h 37m

$363

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 13/9

13:00-21:47

Nonstop5h 47m

Boston Logan Intl

Wed 24/9

16:55-20:31

Nonstop6h 36m

$363

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 7/10

21:50-06:30

Nonstop5h 40m

Boston Logan Intl

Wed 29/10

19:55-23:41

Nonstop6h 46m

$363

Flights are sorted by cheapest return flights first.

Deals found on 12/8

Showing 1-10 of 20 results
1
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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 8 August 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, February is the cheapest month in which you can book a flight from San Francisco to Boston (average of $1,183). Flying from San Francisco to Boston in December is currently the most expensive (average of $1,631). 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 15 August 2025.

It’s optimal to fly from San Francisco to Boston in the afternoon. By choosing this option you can save up to 4% on the cost of your flight, compared to a flight at midday.

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 15 August 2025.

The most flights from SFO to BOS are scheduled on a Thursday (64 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (26 on average).

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 8 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • 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(96%), Scandinavian Airlines(95%) or Air China(88%), 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 $1,183). Flying from San Francisco to Boston in December is currently the most expensive (average of $1,631). 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

See prices for flight routes from nearby airports that may be better suited for you.
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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