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Cheap flights from Seattle to Key West from $284

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Key West departing on 6/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Key West

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
7:16 am - 7:54 pm
SEA
-
EYW
9h 38m
1 stop
Delta Logo
6:15 pm - 11:57 pm
EYW
-
SEA
8h 42m
1 stop
$369Delta
Thu, Aug 20 - Wed, Aug 26
American Airlines Logo
5:10 am - 4:18 pm
SEA
-
EYW
8h 08m
1 stop
American Airlines Logo
2:25 pm - 10:59 pm
EYW
-
SEA
11h 34m
1 stop
$399American Airlines
Tue, Aug 11 - Tue, Aug 18
American Airlines Logo
11:16 pm - 1:08 pm
SEA
-
EYW
10h 52m
2 stops
American Airlines Logo
2:25 pm - 10:59 pm
EYW
-
SEA
11h 34m
1 stop
$404American Airlines
Tue, Aug 11 - Tue, Aug 18
American Airlines Logo
11:16 pm - 1:08 pm
SEA
-
EYW
10h 52m
2 stops
American Airlines Logo
1:40 pm - 11:50 pm
EYW
-
SEA
13h 10m
2 stops
$429American Airlines
Tue, Aug 11 - Tue, Aug 18
American Airlines Logo
7:15 am - 6:44 pm
SEA
-
EYW
8h 29m
1 stop
American Airlines Logo
7:03 pm - 12:20 am
EYW
-
SEA
8h 17m
1 stop
$442American Airlines
Thu, Aug 20 - Tue, Aug 25
American Airlines Logo
5:15 am - 6:44 pm
SEA
-
EYW
10h 29m
1 stop
American Airlines Logo
2:25 pm - 10:59 pm
EYW
-
SEA
11h 34m
1 stop
$444American Airlines
Thu, Aug 20 - Tue, Aug 25
American Airlines Logo
11:11 pm - 1:05 pm
SEA
-
EYW
10h 54m
2 stops
American Airlines Logo
7:03 pm - 12:20 am
EYW
-
SEA
8h 17m
1 stop
$447American Airlines
Thu, Aug 20 - Tue, Aug 25
American Airlines Logo
11:11 pm - 1:05 pm
SEA
-
EYW
10h 54m
2 stops
American Airlines Logo
2:25 pm - 10:59 pm
EYW
-
SEA
11h 34m
1 stop
$449American Airlines
Thu, Aug 20 - Tue, Aug 25
American Airlines Logo
7:15 am - 6:44 pm
SEA
-
EYW
8h 29m
1 stop
American Airlines Logo
2:25 pm - 10:59 pm
EYW
-
SEA
11h 34m
1 stop
$452American Airlines
Thu, Aug 20 - Tue, Aug 25
American Airlines Logo
11:11 pm - 1:05 pm
SEA
-
EYW
10h 54m
2 stops
American Airlines Logo
1:49 pm - 10:26 pm
EYW
-
SEA
11h 37m
2 stops
$454American Airlines
Thu, Aug 20 - Wed, Aug 26

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Delta flights from Seattle to Key West

Our best Delta deals on Seattle to Key West flight tickets
Delta
Aug 20
SEA7:16 amSeattle/Tacoma Intl
9h 38m
1 stop
EYW7:54 pmKey West
Aug 26
EYW6:15 pmKey West
8h 42m
1 stop
SEA11:57 pmSeattle/Tacoma Intl
$369
Delta
Jul 14
SEA6:00 amSeattle/Tacoma Intl
10h 51m
1 stop
EYW7:51 pmKey West
Jul 20
EYW2:24 pmKey West
10h 24m
1 stop
SEA9:48 pmSeattle/Tacoma Intl
$515
Delta
May 9
SEA7:30 amSeattle/Tacoma Intl
9h 19m
1 stop
EYW7:49 pmKey West
May 13
EYW11:48 amKey West
9h 32m
1 stop
SEA6:20 pmSeattle/Tacoma Intl
$545

American Airlines flights from Seattle to Key West

Our best American Airlines deals on Seattle to Key West flight tickets
American Airlines
Aug 11
SEA5:10 amSeattle/Tacoma Intl
8h 08m
1 stop
EYW4:18 pmKey West
Aug 18
EYW2:25 pmKey West
11h 34m
1 stop
SEA10:59 pmSeattle/Tacoma Intl
$399
American Airlines
Aug 11
SEA11:16 pmSeattle/Tacoma Intl
10h 52m
2 stops
EYW1:08 pmKey West
Aug 18
EYW2:25 pmKey West
11h 34m
1 stop
SEA10:59 pmSeattle/Tacoma Intl
$404
American Airlines
Aug 11
SEA11:16 pmSeattle/Tacoma Intl
10h 52m
2 stops
EYW1:08 pmKey West
Aug 18
EYW1:40 pmKey West
13h 10m
2 stops
SEA11:50 pmSeattle/Tacoma Intl
$429

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Key West that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated May 3, 2026.
Use the filters below to find and compare flights from Seattle to Key West that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Thu 8/20

7:16 am-7:54 pm

1 stop9h 38m

Key West

Wed 8/26

6:15 pm-11:57 pm

1 stop8h 42m

$369

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Tue 8/11

5:10 am-4:18 pm

1 stop8h 08m

Key West

Tue 8/18

2:25 pm-10:59 pm

1 stop11h 34m

$399

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Tue 8/11

11:16 pm-1:08 pm

2 stops10h 52m

Key West

Tue 8/18

2:25 pm-10:59 pm

1 stop11h 34m

$404

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Tue 8/11

11:16 pm-1:08 pm

2 stops10h 52m

Key West

Tue 8/18

1:40 pm-11:50 pm

2 stops13h 10m

$429
Quickest round-trip

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Thu 8/20

7:15 am-6:44 pm

1 stop8h 29m

Key West

Tue 8/25

7:03 pm-12:20 am

1 stop8h 17m

$442

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Thu 8/20

5:15 am-6:44 pm

1 stop10h 29m

Key West

Tue 8/25

2:25 pm-10:59 pm

1 stop11h 34m

$444

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Thu 8/20

11:11 pm-1:05 pm

2 stops10h 54m

Key West

Tue 8/25

7:03 pm-12:20 am

1 stop8h 17m

$447

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Thu 8/20

11:11 pm-1:05 pm

2 stops10h 54m

Key West

Tue 8/25

2:25 pm-10:59 pm

1 stop11h 34m

$449

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Thu 8/20

7:15 am-6:44 pm

1 stop8h 29m

Key West

Tue 8/25

2:25 pm-10:59 pm

1 stop11h 34m

$452

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Thu 8/20

11:11 pm-1:05 pm

2 stops10h 54m

Key West

Wed 8/26

1:49 pm-10:26 pm

2 stops11h 37m

$454

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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2

See travel insights to Key West from

How to get the cheapest flight ticket from Seattle to Key West

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Seattle and Key West?

What is the cheapest month to fly to Key West?

In general, September is the cheapest month to fly from Seattle to Key West. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $384. If you are unable to visit Key West during the month of September, then departing from Seattle during the month July is also very affordable. Most momondo users find prices during this month for around $388.

Can stopping save me money on Seattle to Key West flights?

You could potentially save up to 29% on your flight if you consider stops on a Seattle to Key West flight.

How have Seattle to Key West flight prices changed over time?

As of May 2026, prices for Seattle to Key West flights are approximately 9% more expensive when compared to flights at the same time last year.

When to book flights from Seattle to Key West

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Key West according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Key West (SEA to EYW) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Key West

Fastest flight time

9h 19m

Direct flights

None
The fastest flight from Seattle to Key West takes 9h 19m
There are no direct flights from Seattle to Key West. There are no popular flight routes from Seattle to Key West.
Search flight deals

Frequently asked questions about flying from Seattle to Key West

  • How far is Seattle/Tacoma Intl to Key West by plane?

    The distance between Seattle/Tacoma Intl and Key West is about 2719.2 mi. By plane, this route typically takes 9h 19m.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Key West Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Key West Airport refresh daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Key West Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Key West Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Key West Airport.

  • What documentation or ID do you need to fly to Key West Airport?

    The travel and health documents required for your trip to Key West Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Key West Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Seattle to Key West?

Best airlines flying from Seattle to Key West

Compare and see reviews for airlines that fly from Seattle to Key West with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $334Free CancellationRating
7.1
11,672 reviews
Search American Airlines flights
DeltaPriceFrom $338Free CancellationRating
7.9
8,460 reviews
Search Delta flights

Traveling to a place near Key West?

Book flights to Key West if you plan to visit one of these locations
Big Pine Key
Little Torch Key

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Key West?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Key West from Seattle.

Can I find flights from Seattle to Key West with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Seattle to Key West flights to just show those with flexible booking policies.

How can momondo help me find flights from Seattle to Key West?

momondo helps you find the best flight between Seattle and Key West by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Seattle to Key West right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Key West, momondo offers a useful price alert feature which will track prices for flights to Key West from Seattle and alert you when they change.

An easier way to manage your Key West trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
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