Price observed over the last 3 months for a round trip.
Compare all flight tickets and find cheap flights from San Francisco to Boston
The cheapest flights right now
San Francisco – Boston
Outbound – Sep 20, 2026
direct
5h 50m Return – Sep 26, 2026
direct
6h 26m $336
yesterday
San Francisco – Boston
Outbound – Sep 20, 2026
direct
5h 50m Return – Sep 26, 2026
direct
6h 31m $356
yesterday
* Prices are in USD per passenger, including taxes, for a round trip. Prices are based on searches carried out within the last 72 hours. Please note that availability and ticket prices are subject to change and should not be considered as the final price quoted.
Cheapest flight tickets
$187
Average price of a round trip
$199
Average flight ticket price recorded over the last 3 months for a round trip.
Flight duration
9h37
A flight from San Francisco to Boston takes on average 9h37.
Best time
June
According to user searches, the ideal month to go to Boston is June.
The best flight deals for a week
San Francisco – Boston
Outbound – Sep 20, 2026
direct
5h 50m Return – Sep 26, 2026
direct
6h 26m $336
yesterday
San Francisco – Boston
Outbound – Sep 20, 2026
direct
5h 50m Return – Sep 26, 2026
direct
6h 31m $356
yesterday
* Prices are in USD per passenger, including taxes, for a round trip. Prices are based on searches carried out within the last 72 hours. Please note that availability and ticket prices are subject to change and should not be considered as the final price quoted.
Tips for finding a cheap flight from San Francisco to Boston
Check out our tips for booking your flight to Boston (USA) from San Francisco (USA) at the cheapest possible price.
Usually, the cheapest month to pick up a ticket on this route is September, with an average flight ticket price of $290 (calculation over the last two years). The most touristic season corresponds to the months of September, October and December.
For the cheapest flights, it is advisable to buy your ticket at least 3 days before the departure date.
The airline offering the cheapest flight tickets is Frontier Airlines. A ticket from the airline Frontier Airlines to Boston costs on average $188.
The airlines that offer the most flights are .
Price of flight tickets from San Francisco to Boston
Here is some information and tips to know before booking your flight:
- Flight ticket prices range from $187 to $352
- The average price of a flight ticket is about $199
- Prices are lowest for stays in the month of September
- The month in which booking a ticket is cheaper is: April
info departure city :
San Francisco, USA
airport :
San Francisco International Airport (SFO)
local time :
San Francisco is a city in the country USA, the time zone is [[timezone]]. In San Francisco, it is currently {fromLocalTime}, the temperature is on average 16°C, with a minimum of 13°C and a maximum of 22°C.
The city of San Francisco has 1 airport(s): San Francisco
destination info :
Boston, USA
airport :
Boston-Logan International Airport (BOS)
local time :
Boston is in the country USA, the time zone is [[timezone]]. In Boston, it is currently {toLocalTime}, the temperature is on average 22°C, with a minimum of 14°C and a maximum of 30°C.
The city of Boston has 1 airport(s): Boston-Logan
Useful info about Boston
What is the least touristic period to go to Boston?
If you want to visit Boston during the least touristic period, choose the month of June.
What is the most popular time to travel to Boston?
In Boston, the most popular month is September. It is during this period that the prices offered by airlines are also the highest.
When should I book my flight from San Francisco to Boston?
According to our data, it is recommended to book your flight 3 days before your departure. If you book your flight ticket 1 weeks before your departure, you may find a price below average. The cheapest day to book a flight from San Francisco to Boston is Saturday.
What are the arrival and destination airports when traveling between San Francisco and Boston?
When you leave, you can leave from San Francisco, and you will arrive at .
How to reach San Francisco airport from the city centre?
This information is not available at this time.
Are there other means of transportation to go from San Francisco to Boston?
The journey from San Francisco to Boston can also be done by train. Search on Liligo to compare the different means of transportation.
Are there big differences in weather between San Francisco and Boston?
In summer, the average temperature is 22°C in Boston and 17°C in San Francisco. The average rainfall in summer is 106 mm in Boston and 2 mm in San Francisco. In summer, it is warmer in Boston and it rains less in San Francisco. In winter, it is colder in San Francisco and it rains more in Boston.