$210 Cheap Flights from Seattle (SEA) to Key West (EYW)

View $210 flight on Sat, Sep 6, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Key West Intl. Airport (EYW)

Cheap Flights from Seattle to Key West (SEA-EYW)

Prices were available within the past 7 days and start at $210 for one-way flights and $309 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Nov 15 - Thu, Nov 20
SEA
Seattle
EYW
Key West
$309 Roundtrip, found 4 days ago
$309
Roundtrip
found 4 days ago
Select Delta flight, departing Sat, Nov 15 from Seattle to Key West, returning Thu, Nov 20, priced at $309 found 4 days ago
United
Sat, Feb 21 - Fri, Feb 27
SEA
Seattle
EYW
Key West
$309 Roundtrip, found 1 day ago
$309
Roundtrip
found 1 day ago
Select United flight, departing Sat, Feb 21 from Seattle to Key West, returning Fri, Feb 27, priced at $309 found 1 day ago
American Airlines
Thu, Dec 4 - Tue, Dec 9
SEA
Seattle
EYW
Key West
$319 Roundtrip, found 5 days ago
$319
Roundtrip
found 5 days ago
Select American Airlines flight, departing Thu, Dec 4 from Seattle to Key West, returning Tue, Dec 9, priced at $319 found 5 days ago
American Airlines
Tue, Dec 9 - Tue, Dec 16
SEA
Seattle
EYW
Key West
$329 Roundtrip, found 3 hours ago
$329
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Tue, Dec 9 from Seattle to Key West, returning Tue, Dec 16, priced at $329 found 3 hours ago
American Airlines
Tue, Dec 9 - Tue, Dec 16
SEA
Seattle
EYW
Key West
$334 Roundtrip, found 3 hours ago
$334
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Tue, Dec 9 from Seattle to Key West, returning Tue, Dec 16, priced at $334 found 3 hours ago
Delta
Sat, Nov 15 - Thu, Nov 20
SEA
Seattle
EYW
Key West
$339 Roundtrip, found 4 days ago
$339
Roundtrip
found 4 days ago
Select Delta flight, departing Sat, Nov 15 from Seattle to Key West, returning Thu, Nov 20, priced at $339 found 4 days ago
American Airlines
Wed, Jan 21 - Wed, Jan 28
SEA
Seattle
EYW
Key West
$339 Roundtrip, found 1 day ago
$339
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Jan 21 from Seattle to Key West, returning Wed, Jan 28, priced at $339 found 1 day ago
American Airlines
Sat, Sep 13 - Thu, Sep 25
SEA
Seattle
EYW
Key West
$344 Roundtrip, found 5 days ago
$344
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sat, Sep 13 from Seattle to Key West, returning Thu, Sep 25, priced at $344 found 5 days ago
American Airlines
Tue, Dec 9 - Tue, Dec 16
SEA
Seattle
EYW
Key West
$359 Roundtrip, found 3 hours ago
$359
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Tue, Dec 9 from Seattle to Key West, returning Tue, Dec 16, priced at $359 found 3 hours ago
Alaska Airlines
Fri, Jan 2 - Tue, Jan 13
SEA
Seattle
EYW
Key West
$581 Roundtrip, found 3 days ago
$581
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Fri, Jan 2 from Seattle to Key West, returning Tue, Jan 13, priced at $581 found 3 days ago

Find the cheapest month to fly from Seattle (SEA) to Key West (EYW)

January is typically the cheapest month to fly

From $278 - $685 per traveler.

Graph displaying average flight prices per month

Alternative airports near Key West

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Key West Intl. EYW. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $651
EYW
Key West Intl.
CheapestClosest
Average driving time to city center8 min
Flights from $651
Flights from Seattle (SEA) to Key West (EYW)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Key West Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
$308
Distance
2717 mi

Seattle to Key West Flights

The cheapest times to fly from Seattle to Key West

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Key West are during the month of November. You can find some of the cheapest flights from Seattle to Key West with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Key West

Sunday is one of the best days to book for cheap flights from Seattle to Key West: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to Key West

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Key West in 2025. You can also book with separate airlines for your outbound and return journeys, from $210 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Key West flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Key West airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Key West Intl. Airport (EYW) cost?
Secure a cheap one-way flight from $210 or cheap return flight from $309 from Seattle - Tacoma Intl. Airport (SEA) to Key West Intl. Airport (EYW) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Key West Intl. Airport (EYW)?
November is the cheapest month to fly from SEA to EYW. Planning your trip for the off-season is often the key to better flight prices.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Key West Intl. Airport (EYW)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest SEA to EYW flight.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Key West Intl. Airport (EYW)?
There are no daily direct flights available from Seattle - Tacoma Intl. Airport (SEA) to Key West Intl. Airport (EYW). But you can opt for flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be soaring above the clouds before you know it.
What day of the week has the most flights from SEA to EYW?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can change based on a range of factors, including the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Key West Intl. Airport (EYW)?
To avoid possible delays on the Seattle - Tacoma Intl. Airport (SEA) to Key West Intl. Airport (EYW) route, aim to travel before 3 PM. Later flights have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Key West Intl. Airport (EYW) last-minute?
Booking your flight from SEA to EYW right before your journey is typically more expensive. However, if you're flexible with your travel times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a SEA to EYW flight and hotel package?
You'll typically save money by securing a SEA to EYW flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. Once you've chosen your ideal accommodations and flights, consider adding extras including tours, activities and car rentals.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Key West Intl. Airport (EYW)?
It's usually possible to cancel or reschedule your SEA to EYW flight. However, for bookings made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more details on our Customer Service portal.

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*Available to One Key members.