Price observed over the last 3 months for a round trip.
Compare all flight tickets and find cheap flights from Seattle to Key West
The cheapest flights right now
Seattle – Key West
Outbound – Nov 14, 2026
1 stop
8h 45m DFW
Return – Nov 20, 2026
1 stop
8h 36m DFW
$599
yesterday
Seattle – Key West
Outbound – Nov 14, 2026
1 stop
8h 45m DFW
Return – Nov 20, 2026
1 stop
10h 16m MIA
$532
yesterday
Seattle – Key West
Outbound – Nov 27, 2026
1 stop
11h 42m EWR
Return – Dec 3, 2026
1 stop
9h 33m ORD
$544
3 days ago
Seattle – Key West
Outbound – Nov 27, 2026
1 stop
9h 38m MIA
Return – Dec 3, 2026
1 stop
9h 20m CLT
$565
3 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
$477
Average price of a round trip
$484
Average flight ticket price recorded over the last 3 months for a round trip.
Flight duration
28h21
A flight from Seattle to Key West takes on average 28h21.
Best time
September
According to user searches, the ideal month to go to Key West is September.
The best flight deals for a week
Seattle – Key West
Outbound – Nov 27, 2026
1 stop
11h 42m EWR
Return – Dec 3, 2026
1 stop
9h 33m ORD
$544
3 days ago
Seattle – Key West
Outbound – Nov 27, 2026
1 stop
9h 38m MIA
Return – Dec 3, 2026
1 stop
9h 20m CLT
$565
3 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.
Tips for finding a cheap flight from Seattle to Key West
Check out our tips for booking your flight to Key West (USA) from Seattle (USA) at the cheapest possible price.
Usually, the cheapest month to pick up a ticket on this route is October, with an average flight ticket price of $484 (calculation over the last two years). The most touristic season corresponds to the months of October, November and January.
For the cheapest flights, it is advisable to buy your ticket at least 39 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 $484.
The airlines that offer the most flights are .
Price of flight tickets from Seattle to Key West
Here is some information and tips to know before booking your flight:
- Flight ticket prices range from $477 to $493
- The average price of a flight ticket is about $484
- Prices are lowest for stays in the month of October
- The month in which booking a ticket is cheaper is: October
info departure city :
Seattle, USA
airports :
Kenmore Air Harbor Spb. (LKE)
Seattle-Tacoma International Airport (SEA)
Renton Municipal Airport (RNT)
King County International Airport (BFI)
local time :
Seattle is a city in the country USA, the time zone is [[timezone]]. In Seattle, it is currently {fromLocalTime}, the temperature is on average 15°C, with a minimum of 10°C and a maximum of 23°C.
The city of Seattle (SEA) has 4 airport(s): Kenmore Air Harbor Spb., Seattle-Tacoma, Renton and King County
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 29°C, with a minimum of 28°C and a maximum of 29°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 September.
What is the most popular time to travel to Key West?
In Key West, the most popular month is October. It is during this period that the prices offered by airlines are also the highest.
When should I book my flight from Seattle to Key West?
According to our data, it is recommended to book your flight 39 days before your departure. If you book your flight ticket 6 weeks before your departure, you may find a price below average. The cheapest day to book a flight from Seattle to Key West is Sunday.
What are the arrival and destination airports when traveling between Seattle and Key West?
When you leave, you can leave from Seattle-Tacoma, and you will arrive at Key West.
How to reach Seattle airport from the city centre?
The airport Kenmore Air Harbor Spb. is located 3 km, Seattle-Tacoma is located 16 km, Renton is located 16 km or King County is located 8 km from the city centre. You can access it by using public transportation, taking a taxi, or renting a car.
Are there other means of transportation to go from Seattle to Key West?
Airplane is the only means of transportation listed on Liligo for this journey.
Are there big differences in weather between Seattle and Key West?
In summer, the average temperature is 29°C in Key West and 18°C in Seattle. The average rainfall in summer is 124 mm in Key West and 38 mm in Seattle. In summer, it is warmer in Key West and it rains less in Seattle. In winter, it is colder in Key West and it rains more in Seattle.
