$185 Cheap Flights from Key West (EYW) to Seattle (SEA)

View $185 flight on Fri, Oct 31, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $185 for one-way flights and $309 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Oct 29 - Mon, Nov 3
EYW
Key West
SEA
Seattle
$309 Roundtrip, found 2 hours ago
$309
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Wed, Oct 29 from Key West to Seattle, returning Mon, Nov 3, priced at $309 found 2 hours ago
Delta
Fri, Dec 5 - Sat, Dec 6
EYW
Key West
SEA
Seattle
$309 Roundtrip, found 2 days ago
$309
Roundtrip
found 2 days ago
Select Delta flight, departing Fri, Dec 5 from Key West to Seattle, returning Sat, Dec 6, priced at $309 found 2 days ago
United
Thu, Nov 6 - Mon, Nov 10
EYW
Key West
SEA
Seattle
$309 Roundtrip, found 6 hours ago
$309
Roundtrip
found 6 hours ago
Select United flight, departing Thu, Nov 6 from Key West to Seattle, returning Mon, Nov 10, priced at $309 found 6 hours ago
American Airlines
Thu, Nov 6 - Mon, Nov 10
EYW
Key West
SEA
Seattle
$314 Roundtrip, found 6 hours ago
$314
Roundtrip
found 6 hours ago
Select American Airlines flight, departing Thu, Nov 6 from Key West to Seattle, returning Mon, Nov 10, priced at $314 found 6 hours ago
American Airlines
Fri, Dec 5 - Sat, Dec 6
EYW
Key West
SEA
Seattle
$319 Roundtrip, found 2 days ago
$319
Roundtrip
found 2 days ago
Select American Airlines flight, departing Fri, Dec 5 from Key West to Seattle, returning Sat, Dec 6, priced at $319 found 2 days ago
American Airlines
Tue, Mar 24 - Tue, Mar 31
EYW
Key West
SEA
Seattle
$349 Roundtrip, found 1 day ago
$349
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Mar 24 from Key West to Seattle, returning Tue, Mar 31, priced at $349 found 1 day ago
American Airlines
Fri, Dec 5 - Sat, Dec 6
EYW
Key West
SEA
Seattle
$354 Roundtrip, found 2 days ago
$354
Roundtrip
found 2 days ago
Select American Airlines flight, departing Fri, Dec 5 from Key West to Seattle, returning Sat, Dec 6, priced at $354 found 2 days ago
Delta
Thu, Nov 6 - Mon, Nov 10
EYW
Key West
SEA
Seattle
$356 Roundtrip, found 6 hours ago
$356
Roundtrip
found 6 hours ago
Select Delta flight, departing Thu, Nov 6 from Key West to Seattle, returning Mon, Nov 10, priced at $356 found 6 hours ago
Delta
Tue, Mar 24 - Tue, Mar 31
EYW
Key West
SEA
Seattle
$359 Roundtrip, found 1 day ago
$359
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Mar 24 from Key West to Seattle, returning Tue, Mar 31, priced at $359 found 1 day ago
Alaska Airlines
Fri, Dec 12 - Tue, Dec 16
EYW
Key West
SEA
Seattle
$492 Roundtrip, found 6 days ago
$492
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Fri, Dec 12 from Key West to Seattle, returning Tue, Dec 16, priced at $492 found 6 days ago

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

March is typically the cheapest month to fly

From $279 - $1,068 per traveler.

Alternative airports near Seattle

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

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $556
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $556

Frequently asked questions

How much does a flight from Key West Intl. Airport (EYW) to Seattle - Tacoma Intl. Airport (SEA) cost?
Snag a cheap one-way flight from $185 or cheap return flight from $309 from Key West Intl. Airport (EYW) to Seattle - Tacoma Intl. Airport (SEA) 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 Key West Intl. Airport (EYW) to Seattle - Tacoma Intl. Airport (SEA)?
October is the least expensive month to fly from EYW to SEA. Traveling outside of peak seasons is often the key to finding better fares.
What is the cheapest airline that flies from Key West Intl. Airport (EYW) to Seattle - Tacoma Intl. Airport (SEA)?
To find the cheapest airline that'll fly you from EYW to SEA, use Expedia's filter tool. Tailor your search based on what matters most to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Key West Intl. Airport (EYW) to Seattle - Tacoma Intl. Airport (SEA)?
You'll need to take a flight with a layover when traveling from Key West Intl. Airport (EYW) to Seattle - Tacoma Intl. Airport (SEA). There are no daily direct flights on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from EYW to SEA?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Key West Intl. Airport (EYW) to Seattle - Tacoma Intl. Airport (SEA)?
To avoid potential delays on the Key West Intl. Airport (EYW) to Seattle - Tacoma Intl. Airport (SEA) route, aim to fly before 3 PM. Flights after this time have a 22% higher chance of being canceled.**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 Key West Intl. Airport (EYW) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Holding off until just before your trip to book a ticket from EYW to SEA often results in higher prices. While you may find some last-minute deals, there's no guarantee. Allow some flexibility in your schedule to boost your chances of snagging a bargain.
Is it cheaper to book an EYW to SEA flight and hotel package?
You'll typically save money by securing an EYW to SEA 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 everything in one convenient place. After selecting your preferred accommodations and flights, consider other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Key West Intl. Airport (EYW) to Seattle - Tacoma Intl. Airport (SEA)?
In most cases, you can cancel or modify your EYW to SEA flight. However, additional fees may apply, especially if your booking was made over 24 hours ago. Double-check your itinerary for the airline's guidelines and fees on flight changes, or if you want more details, visit our Customer Service portal.

Travel information

Travel information

Origin airport
Key West Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
$308
Distance
2717 mi

Book with confidence

Book with confidence

Key West to Seattle Flights

The cheapest times to fly from Key West to Seattle

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 Key West to Seattle are during the month of October. You can find some of the cheapest flights from Key West to Seattle with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Key West to Seattle: 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 Key West to Seattle

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 Key West to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $185 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 Key West to Seattle 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 Key West to Seattle 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.

 

Key West to Seattle Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to One Key members.