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Cheap flights from San Francisco to Boston from C$ 185

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 17/1. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BOS
11 Jan — 18 Jan1
1 adult
1 adult, Economy, 0 bags

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 Tuesday or Monday and return on a Saturday

Cheap 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 12 December 2025.

Fri 26/127:30 a.m.SFO - BOS
Nonstop5h 40mDelta
Wed 7/17:50 a.m.BOS - SFO
Nonstop7h 00mDelta
Deal found 10/12C$ 389
Thu 25/127:25 a.m.SFO - BOS
Nonstop5h 47mAlaska Airlines
Wed 7/14:20 p.m.BOS - SFO
1 stop9h 27mAlaska Airlines
Deal found 10/12C$ 403
Thu 25/127:30 a.m.SFO - BOS
Nonstop5h 40mDelta
Thu 8/15:40 p.m.BOS - SFO
Nonstop7h 02mDelta
Deal found 10/12C$ 416
Wed 31/128:44 p.m.SFO - BOS
Nonstop5h 31mJetBlue
Wed 7/17:09 p.m.BOS - SFO
Nonstop6h 50mJetBlue
Deal found 10/12C$ 418
Sun 28/126:04 a.m.SFO - BOS
1 stop10h 56mJetBlue
Wed 7/17:09 p.m.BOS - SFO
Nonstop6h 50mJetBlue
Deal found 11/12C$ 429
Wed 24/124:10 p.m.SFO - BOS
Nonstop5h 43mUnited Airlines
Thu 8/111:17 a.m.BOS - SFO
1 stop9h 33mUnited Airlines
Deal found 10/12C$ 430
Fri 26/121:15 p.m.SFO - BOS
Nonstop5h 38mJetBlue
Thu 1/18:59 p.m.BOS - SFO
Nonstop6h 53mJetBlue
Deal found 11/12C$ 434
Tue 30/124:10 p.m.SFO - BOS
Nonstop5h 43mUnited Airlines
Tue 27/17:55 a.m.BOS - SFO
Nonstop6h 55mUnited Airlines
Deal found 10/12C$ 440
Wed 24/124:10 p.m.SFO - BOS
Nonstop5h 43mUnited Airlines
Thu 1/17:44 p.m.BOS - SFO
1 stop8h 33mUnited Airlines
Deal found 10/12C$ 448
Thu 25/127:25 a.m.SFO - BOS
Nonstop5h 47mAlaska Airlines
Tue 6/17:23 p.m.BOS - SFO
Nonstop6h 47mAlaska Airlines
Deal found 10/12C$ 451
Tue 30/1210:50 p.m.SFO - BOS
1 stop7h 29mUnited Airlines
Tue 6/15:20 a.m.BOS - SFO
1 stop9h 03mUnited Airlines
Deal found 9/12C$ 454

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 12 December 2025.

Round-trip from

C$ 306

One-way from

C$ 185

Popular in

December

Cheapest in

January

Average price

C$ 637
JetBlue
  • JetBlue
  • 7/1-7/1
  • Nonstop
  • 12h 29m total
  • San Francisco to Boston
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United Airlines
  • United Airlines
  • 11/1
  • 1 total stop
  • 7h 56m total
  • San Francisco to Boston
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (C$ 6 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 629,999 searches. Data last updated 12 December 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

Thu 8/1

7:10 a.m.-3:51 p.m.

Nonstop5h 41m

Boston Logan Intl

Wed 14/1

5:40 p.m.-9:42 p.m.

Nonstop7h 02m

C$ 313

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 7/1

7:10 a.m.-3:51 p.m.

Nonstop5h 41m

Boston Logan Intl

Fri 16/1

5:40 p.m.-9:42 p.m.

Nonstop7h 02m

C$ 313

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Thu 8/1

7:00 a.m.-6:32 p.m.

1 stop8h 32m

Boston Logan Intl

Wed 14/1

10:56 a.m.-2:51 p.m.

Nonstop6h 55m

C$ 327

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Thu 22/1

8:37 p.m.-7:57 a.m.

1 stop8h 20m

Boston Logan Intl

Tue 27/1

7:11 a.m.-11:10 a.m.

Nonstop6h 59m

C$ 345

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Thu 29/1

1:00 p.m.-9:42 p.m.

Nonstop5h 42m

Boston Logan Intl

Sun 1/2

7:07 p.m.-1:30 a.m.

1 stop9h 23m

C$ 354

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 9/1

11:25 p.m.-8:10 a.m.

Nonstop5h 45m

Boston Logan Intl

Sun 18/1

7:25 a.m.-1:29 p.m.

1 stop9h 04m

C$ 354

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 9/1

11:25 p.m.-8:10 a.m.

Nonstop5h 45m

Boston Logan Intl

Fri 16/1

1:30 p.m.-7:55 p.m.

1 stop9h 25m

C$ 354

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sun 18/1

5:00 a.m.-3:37 p.m.

1 stop7h 37m

Boston Logan Intl

Sun 25/1

7:55 a.m.-11:48 a.m.

Nonstop6h 53m

C$ 354

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Thu 29/1

12:20 p.m.-8:58 p.m.

Nonstop5h 38m

Boston Logan Intl

Mon 2/2

1:40 p.m.-10:49 p.m.

1 stop12h 09m

C$ 372

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sun 25/1

7:00 a.m.-6:48 p.m.

1 stop8h 48m

Boston Logan Intl

Sun 1/2

7:09 p.m.-10:59 p.m.

Nonstop6h 50m

C$ 372

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/12

Showing 1-10 of 22 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 5 December 2025.

Booking 69 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Francisco to Boston. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, December is the cheapest month in which you can book a flight from San Francisco to Boston (average of C$ 163). Flying from San Francisco to Boston in June is currently the most expensive (average of C$ 302). 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 12 December 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 77% on flights from San Francisco to Boston by exploring options for tickets in the evening.

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?

    Flights from San Francisco to Boston Logan Intl have been viewed 5 times in the past calendar month.

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

    A quick flight from San Francisco to Boston can take about 5h 31m. Delta provides one of the quickest options available for as low as C$ 341. The distance from San Francisco to Boston is about 4339 km. Both multi-stop and direct flights can be found to your destination and back.

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

    Consider Air China (100%), American Airlines (92%) or Fiji Airways (88%) when booking your flight. These represent the most reliable airlines 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, December is the cheapest month in which you can book a flight from San Francisco to Boston (average of C$ 163). Flying from San Francisco to Boston in June is currently the most expensive (average of C$ 302). 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
Medford
Chelsea
Waltham
Warwick
Milford
Braintree
Plymouth
Hampton
Old Orchard Beach
Revere
Merrimack
Kennebunk
Watertown
Lawrence
Seekonk
Nashua

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Deals for San Francisco to Boston flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from San Francisco to Boston for you. Better yet — we are completely free to use.

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

Yes, we can. To see specific flights from San Francisco to Boston with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Of course! You can now track prices for flights from San Francisco to Boston and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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