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Cheap flights from Seattle to Key West from $288

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 12/15. 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
1 adult, Economy, 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.
United Airlines Logo
10:45 pm - 1:02 pm
SEA
-
EYW
11h 17m
1 stop
United Airlines Logo
4:05 pm - 12:14 am
EYW
-
SEA
11h 09m
1 stop
$479United Airlines
Sat, Dec 5 - Tue, Dec 8
Delta Logo
11:59 pm - 10:50 am
SEA
-
EYW
7h 51m
1 stop
Delta Logo
1:59 pm - 8:23 pm
EYW
-
SEA
9h 24m
1 stop
$482Delta
Thu, Aug 20 - Tue, Aug 25
American Airlines Logo
8:47 pm - 9:44 am
SEA
-
EYW
9h 57m
1 stop
American Airlines Logo
7:10 pm - 12:20 am
EYW
-
SEA
8h 10m
1 stop
$487American Airlines
Sat, Aug 22 - Sat, Aug 29
Delta Logo
11:59 pm - 10:48 am
SEA
-
EYW
7h 49m
1 stop
Delta Logo
6:11 pm - 11:52 pm
EYW
-
SEA
8h 41m
1 stop
$517Delta
Fri, Oct 30 - Sun, Nov 1
American Airlines Logo
8:21 pm - 9:44 am
SEA
-
EYW
10h 23m
1 stop
American Airlines Logo
1:50 pm - 9:59 pm
EYW
-
SEA
11h 09m
1 stop
$535American Airlines
Thu, Aug 20 - Thu, Aug 27
American Airlines Logo
5:10 am - 4:18 pm
SEA
-
EYW
8h 08m
1 stop
American Airlines Logo
1:50 pm - 9:59 pm
EYW
-
SEA
11h 09m
1 stop
$554American Airlines
Thu, Aug 20 - Tue, Aug 25
Delta Logo
6:00 am - 5:16 pm
SEA
-
EYW
8h 16m
1 stop
Delta Logo
6:11 pm - 11:52 pm
EYW
-
SEA
8h 41m
1 stop
$567Delta
Fri, Oct 30 - Sun, Nov 1
American Airlines Logo
5:24 am - 4:29 pm
SEA
-
EYW
8h 05m
1 stop
American Airlines Logo
4:26 pm - 12:58 am
EYW
-
SEA
11h 32m
2 stops
$578American Airlines
Sat, Nov 14 - Sat, Nov 21
Delta Logo
6:00 am - 5:16 pm
SEA
-
EYW
8h 16m
1 stop
Delta Logo
6:11 pm - 11:52 pm
EYW
-
SEA
8h 41m
1 stop
$597Delta
Fri, Oct 30 - Sun, Nov 1
American Airlines Logo
8:21 pm - 9:44 am
SEA
-
EYW
10h 23m
1 stop
American Airlines Logo
1:40 pm - 10:26 pm
EYW
-
SEA
11h 46m
2 stops
$604American Airlines
Thu, Aug 20 - Tue, Aug 25

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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
SEA11:59 pmSeattle/Tacoma Intl
7h 51m
1 stop
EYW10:50 amKey West
Aug 25
EYW1:59 pmKey West
9h 24m
1 stop
SEA8:23 pmSeattle/Tacoma Intl
$482
Delta
Oct 30
SEA11:59 pmSeattle/Tacoma Intl
7h 49m
1 stop
EYW10:48 amKey West
Nov 1
EYW6:11 pmKey West
8h 41m
1 stop
SEA11:52 pmSeattle/Tacoma Intl
$517
Delta
Oct 30
SEA6:00 amSeattle/Tacoma Intl
8h 16m
1 stop
EYW5:16 pmKey West
Nov 1
EYW6:11 pmKey West
8h 41m
1 stop
SEA11:52 pmSeattle/Tacoma Intl
$567

American Airlines flights from Seattle to Key West

Our best American Airlines deals on Seattle to Key West flight tickets
American Airlines
Aug 22
SEA8:47 pmSeattle/Tacoma Intl
9h 57m
1 stop
EYW9:44 amKey West
Aug 29
EYW7:10 pmKey West
8h 10m
1 stop
SEA12:20 amSeattle/Tacoma Intl
$487
American Airlines
Aug 20
SEA8:21 pmSeattle/Tacoma Intl
10h 23m
1 stop
EYW9:44 amKey West
Aug 27
EYW1:50 pmKey West
11h 09m
1 stop
SEA9:59 pmSeattle/Tacoma Intl
$535
American Airlines
Aug 20
SEA5:10 amSeattle/Tacoma Intl
8h 08m
1 stop
EYW4:18 pmKey West
Aug 25
EYW1:50 pmKey West
11h 09m
1 stop
SEA9:59 pmSeattle/Tacoma Intl
$554

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 July 13, 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

Sat 12/5

10:45 pm-1:02 pm

1 stop11h 17m

Key West

Tue 12/8

4:05 pm-12:14 am

1 stop11h 09m

$479

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Thu 8/20

11:59 pm-10:50 am

1 stop7h 51m

Key West

Tue 8/25

1:59 pm-8:23 pm

1 stop9h 24m

$482

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Sat 8/22

8:47 pm-9:44 am

1 stop9h 57m

Key West

Sat 8/29

7:10 pm-12:20 am

1 stop8h 10m

$487
Quickest round-trip

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Fri 10/30

11:59 pm-10:48 am

1 stop7h 49m

Key West

Sun 11/1

6:11 pm-11:52 pm

1 stop8h 41m

$517

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Thu 8/20

8:21 pm-9:44 am

1 stop10h 23m

Key West

Thu 8/27

1:50 pm-9:59 pm

1 stop11h 09m

$535

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Thu 8/20

5:10 am-4:18 pm

1 stop8h 08m

Key West

Tue 8/25

1:50 pm-9:59 pm

1 stop11h 09m

$554

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Fri 10/30

6:00 am-5:16 pm

1 stop8h 16m

Key West

Sun 11/1

6:11 pm-11:52 pm

1 stop8h 41m

$567

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Sat 11/14

5:24 am-4:29 pm

1 stop8h 05m

Key West

Sat 11/21

4:26 pm-12:58 am

2 stops11h 32m

$578

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Fri 10/30

6:00 am-5:16 pm

1 stop8h 16m

Key West

Sun 11/1

6:11 pm-11:52 pm

1 stop8h 41m

$597

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Thu 8/20

8:21 pm-9:44 am

1 stop10h 23m

Key West

Tue 8/25

1:40 pm-10:26 pm

2 stops11h 46m

$604

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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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 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 34% 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?

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

8h 16m

Direct flights

None
The fastest flight from Seattle to Key West takes 8h 16m
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 8h 16m.

  • 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 $314Free CancellationRating
7.1
11,818 reviews
Search American Airlines flights
DeltaPriceFrom $338Free CancellationRating
7.8
8,472 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.
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