Cheap flights from San Francisco to Boston from C$ 192
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 15/2. Fares are subject to change and may not be available on all flights or dates of travel.
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 Wednesday or Monday and return on a Tuesday
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 28 October 2025.
Find flight deals from San Francisco to Boston
Cheapest flights from San Francisco to BostonExplore 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 28 October 2025.
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 28 October 2025.
Cheapflights Fare Finder
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
San FranciscoBoston
SFO - BOS
SFOBOS
San Francisco
Wed 19/11
8:25 a.m.-5:06 p.m.
Nonstop5h 41m
Boston Logan Intl
Mon 24/11
8:30 p.m.-12:24 a.m.
Nonstop6h 54m
San FranciscoBoston
SFO - BOS
SFOBOS
San Francisco
Mon 10/11
7:00 a.m.-3:35 p.m.
Nonstop5h 35m
Boston Logan Intl
Mon 17/11
8:05 p.m.-11:59 p.m.
Nonstop6h 54m
San FranciscoBoston
SFO - BOS
SFOBOS
San Francisco
Mon 8/12
6:20 p.m.-7:29 a.m.
1 stop10h 09m
Boston Logan Intl
Thu 11/12
4:24 p.m.-11:48 p.m.
1 stop10h 24m
San FranciscoBoston
SFO - BOS
SFOBOS
San Francisco
Sat 13/12
7:00 a.m.-3:37 p.m.
Nonstop5h 37m
Boston Logan Intl
Tue 16/12
6:52 p.m.-10:48 p.m.
Nonstop6h 56m
San FranciscoBoston
SFO - BOS
SFOBOS
San Francisco
Mon 8/12
7:00 a.m.-3:37 p.m.
Nonstop5h 37m
Boston Logan Intl
Tue 16/12
6:52 p.m.-10:48 p.m.
Nonstop6h 56m
San FranciscoBoston
SFO - BOS
SFOBOS
San Francisco
Sun 7/12
10:42 p.m.-10:53 a.m.
1 stop9h 11m
Boston Logan Intl
Fri 12/12
11:40 a.m.-8:10 p.m.
1 stop11h 30m
San FranciscoBoston
SFO - BOS
SFOBOS
San Francisco
Sun 7/12
10:24 p.m.-11:59 p.m.
2 stops22h 35m
Boston Logan Intl
Wed 10/12
4:24 p.m.-10:48 p.m.
1 stop9h 24m
San FranciscoBoston
SFO - BOS
SFOBOS
San Francisco
Mon 24/11
12:15 p.m.-8:48 p.m.
Nonstop5h 33m
Boston Logan Intl
Fri 5/12
1:40 p.m.-8:10 p.m.
1 stop9h 30m
San FranciscoBoston
SFO - BOS
SFOBOS
San Francisco
Tue 11/11
8:25 a.m.-5:30 a.m.
1 stop18h 05m
Boston Logan Intl
Sun 16/11
7:25 a.m.-11:23 a.m.
Nonstop6h 58m
San FranciscoBoston
SFO - BOS
SFOBOS
San Francisco
Wed 12/11
12:43 a.m.-12:26 p.m.
1 stop8h 43m
Boston Logan Intl
Wed 19/11
8:00 a.m.-11:54 a.m.
Nonstop6h 54m
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.
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?
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, February is the cheapest month in which you can book a flight from San Francisco to Boston (average of C$ 166). Flying from San Francisco to Boston in June is currently the most expensive (average of C$ 305). 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?
Unlike in the evening, when flights are generally more expensive, you can save up to 53% on flights from San Francisco to Boston by exploring options for tickets in the morning.
How often are flights from San Francisco to Boston delayed?
About 13% of weekly flights between San Francisco and Boston have experienced delays in the past year, with the average delay time being 162 minutes.
What is the most punctual flight time for San Francisco to Boston flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Tuesday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on San Francisco to Boston flights?
Over the past year, Scandinavian Airlines has had the lowest number of delays on this route, with just 5% of flights being delayed.
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.
Travelling to a place near Boston?
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Other flights to Boston
Explore flights to Boston departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 28 October 2025.
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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.