Price observed over the last 3 months for a round trip.
Compare all flight tickets and find cheap flights from Boston to Key West
The cheapest flights right now
Boston – Key West
Outbound – Nov 27, 2026
1 stop
5h 50m PHL
Return – Dec 5, 2026
direct
3h 33m $379
2 days ago
Boston – Key West
Outbound – Nov 27, 2026
direct
3h 55m Return – Dec 5, 2026
direct
3h 33m $373
2 days ago
Boston – Key West
Outbound – Nov 27, 2026
1 stop
5h 31m CLT
Return – Dec 5, 2026
direct
3h 33m $397
2 days ago
Boston – Key West
Outbound – Nov 27, 2026
1 stop
5h 33m MIA
Return – Dec 5, 2026
direct
3h 33m $433
2 days ago
* 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
$280
Average price of a round trip
$364
Average flight ticket price recorded over the last 3 months for a round trip.
Flight duration
3h53
A flight from Boston to Key West takes on average 3h53.
Best time
December
According to user searches, the ideal month to go to Key West is December.
Tips for finding a cheap flight from Boston to Key West
Check out our tips for booking your flight to Key West (USA) from Boston (USA) at the cheapest possible price.
Usually, the cheapest month to pick up a ticket on this route is February, with an average flight ticket price of $298 (calculation over the last two years). The most touristic season corresponds to the months of November, October and January.
For the cheapest flights, it is advisable to buy your ticket at least 99 days before the departure date.
The airline offering the cheapest flight tickets is Frontier Airlines. A ticket from the airline Frontier Airlines to Key West costs on average $289.
The airlines that offer the most flights are JetBlue and JetBlue.
Price of flight tickets from Boston to Key West
Here is some information and tips to know before booking your flight:
- Flight ticket prices range from $280 to $391
- The average price of a flight ticket is about $364
- Prices are lowest for stays in the month of February
- The month in which booking a ticket is cheaper is: February
info departure city :
Boston, USA
airport :
Boston-Logan International Airport (BOS)
local time :
Boston is a city in the country USA, the time zone is [[timezone]]. In Boston, it is currently {fromLocalTime}, the temperature is on average 10°C, with a minimum of 7°C and a maximum of 13°C.
The city of Boston has 1 airport(s): Boston-Logan
destination info :
Key West, USA
airport :
Key West International Airport (EYW)
local time :
Key West is in the country USA, the time zone is [[timezone]]. In Key West, it is currently {toLocalTime}, the temperature is on average 27°C, with a minimum of 27°C and a maximum of 27°C.
The city of Key West has 1 airport(s): Key West
Useful info about Key West
What is the least touristic period to go to Key West?
If you want to visit Key West during the least touristic period, choose the month of December.
What is the most popular time to travel to Key West?
In Key West, the most popular month is November. It is during this period that the prices offered by airlines are also the highest.
When should I book my flight from Boston to Key West?
According to our data, it is recommended to book your flight 99 days before your departure. If you book your flight ticket 15 weeks before your departure, you may find a price below average. You can also choose morning flights that are 100% cheaper than afternoon and evening flights. The cheapest day to book a flight from Boston to Key West is Monday.
What are the arrival and destination airports when traveling between Boston and Key West?
When you leave, you can leave from Boston-Logan, and you will arrive at Key West.
How to reach Boston airport from the city centre?
This information is not available at this time.
Are there other means of transportation to go from Boston to Key West?
Airplane is the only means of transportation listed on Liligo for this journey.
Are there big differences in weather between Boston and Key West?
In summer, the average temperature is 29°C in Key West and 22°C in Boston. The average rainfall in summer is 124 mm in Key West and 106 mm in Boston. In summer, it is warmer in Key West and it rains less in Boston. In winter, it is colder in Key West and it rains more in Boston.
