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Cheap flights from Seattle to Key West from $153

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 4/20. 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

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Find the cheapest flights from Seattle to Key West

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
12:07 am - 12:53 pm
SEA
-
EYW
9h 46m
1 stop
American Airlines Logo
2:40 pm - 11:09 pm
EYW
-
SEA
11h 29m
1 stop
$359American Airlines
Mon, Mar 2 - Tue, Mar 10
American Airlines Logo
12:59 am - 4:49 pm
SEA
-
EYW
12h 50m
2 stops
American Airlines Logo
2:40 pm - 11:09 pm
EYW
-
SEA
11h 29m
1 stop
$364American Airlines
Mon, Mar 2 - Tue, Mar 10
American Airlines Logo
10:08 pm - 12:03 pm
SEA
-
EYW
10h 55m
1 stop
American Airlines Logo
2:06 pm - 12:24 am
EYW
-
SEA
13h 18m
2 stops
$374American Airlines
Tue, Mar 3 - Sat, Mar 7
American Airlines Logo
12:59 am - 4:49 pm
SEA
-
EYW
12h 50m
2 stops
American Airlines Logo
2:06 pm - 12:24 am
EYW
-
SEA
13h 18m
2 stops
$380American Airlines
Mon, Mar 2 - Sat, Mar 7
United Airlines Logo
11:35 pm - 1:18 pm
SEA
-
EYW
10h 43m
1 stop
United Airlines Logo
2:15 pm - 11:51 pm
EYW
-
SEA
12h 36m
1 stop
$389United Airlines
Sat, Feb 28 - Wed, Mar 4
United Airlines Logo
11:59 pm - 1:23 pm
SEA
-
EYW
10h 24m
1 stop
United Airlines Logo
4:05 pm - 10:45 pm
EYW
-
SEA
9h 40m
1 stop
$429United Airlines
Tue, Mar 10 - Wed, Mar 18
Delta Logo
11:15 pm - 10:50 am
SEA
-
EYW
8h 35m
1 stop
Delta Logo
7:30 am - 8:30 pm
EYW
-
SEA
16h 00m
2 stops
$432Delta
Mon, May 4 - Mon, May 11
United Airlines Logo
5:20 pm - 1:23 pm
SEA
-
EYW
17h 03m
2 stops
United Airlines Logo
4:05 pm - 10:45 pm
EYW
-
SEA
9h 40m
1 stop
$434United Airlines
Tue, Mar 10 - Wed, Mar 18
American Airlines Logo
5:30 am - 4:24 pm
SEA
-
EYW
7h 54m
1 stop
American Airlines Logo
3:56 pm - 11:40 pm
EYW
-
SEA
10h 44m
1 stop
$439American Airlines
Wed, Mar 11 - Tue, Mar 17
American Airlines Logo
7:21 am - 10:18 pm
SEA
-
EYW
11h 57m
2 stops
American Airlines Logo
3:56 pm - 11:40 pm
EYW
-
SEA
10h 44m
1 stop
$444American Airlines
Tue, Mar 10 - Tue, Mar 17

American Airlines flights from Seattle to Key West

Our best American Airlines deals on Seattle to Key West flight tickets
American Airlines
Mar 2
SEA12:07 amSeattle/Tacoma Intl
9h 46m
1 stop
EYW12:53 pmKey West
Mar 10
EYW2:40 pmKey West
11h 29m
1 stop
SEA11:09 pmSeattle/Tacoma Intl
$359
American Airlines
Mar 2
SEA12:59 amSeattle/Tacoma Intl
12h 50m
2 stops
EYW4:49 pmKey West
Mar 10
EYW2:40 pmKey West
11h 29m
1 stop
SEA11:09 pmSeattle/Tacoma Intl
$364
American Airlines
Mar 3
SEA10:08 pmSeattle/Tacoma Intl
10h 55m
1 stop
EYW12:03 pmKey West
Mar 7
EYW2:06 pmKey West
13h 18m
2 stops
SEA12:24 amSeattle/Tacoma Intl
$374

United Airlines flights from Seattle to Key West

Our best United Airlines deals on Seattle to Key West flight tickets
United Airlines
Feb 28
SEA11:35 pmSeattle/Tacoma Intl
10h 43m
1 stop
EYW1:18 pmKey West
Mar 4
EYW2:15 pmKey West
12h 36m
1 stop
SEA11:51 pmSeattle/Tacoma Intl
$389
United Airlines
Mar 10
SEA11:59 pmSeattle/Tacoma Intl
10h 24m
1 stop
EYW1:23 pmKey West
Mar 18
EYW4:05 pmKey West
9h 40m
1 stop
SEA10:45 pmSeattle/Tacoma Intl
$429
United Airlines
Mar 10
SEA5:20 pmSeattle/Tacoma Intl
17h 03m
2 stops
EYW1:23 pmKey West
Mar 18
EYW4:05 pmKey West
9h 40m
1 stop
SEA10:45 pmSeattle/Tacoma Intl
$434

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 February 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

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Mon 3/2

12:07 am-12:53 pm

1 stop9h 46m

Key West

Tue 3/10

2:40 pm-11:09 pm

1 stop11h 29m

$359

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Mon 3/2

12:59 am-4:49 pm

2 stops12h 50m

Key West

Tue 3/10

2:40 pm-11:09 pm

1 stop11h 29m

$364

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Tue 3/3

10:08 pm-12:03 pm

1 stop10h 55m

Key West

Sat 3/7

2:06 pm-12:24 am

2 stops13h 18m

$374

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Mon 3/2

12:59 am-4:49 pm

2 stops12h 50m

Key West

Sat 3/7

2:06 pm-12:24 am

2 stops13h 18m

$380

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Sat 2/28

11:35 pm-1:18 pm

1 stop10h 43m

Key West

Wed 3/4

2:15 pm-11:51 pm

1 stop12h 36m

$389

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Tue 3/10

11:59 pm-1:23 pm

1 stop10h 24m

Key West

Wed 3/18

4:05 pm-10:45 pm

1 stop9h 40m

$429

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Mon 5/4

11:15 pm-10:50 am

1 stop8h 35m

Key West

Mon 5/11

7:30 am-8:30 pm

2 stops16h 00m

$432

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Tue 3/10

5:20 pm-1:23 pm

2 stops17h 03m

Key West

Wed 3/18

4:05 pm-10:45 pm

1 stop9h 40m

$434

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Wed 3/11

5:30 am-4:24 pm

1 stop7h 54m

Key West

Tue 3/17

3:56 pm-11:40 pm

1 stop10h 44m

$439

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Tue 3/10

7:21 am-10:18 pm

2 stops11h 57m

Key West

Tue 3/17

3:56 pm-11:40 pm

1 stop10h 44m

$444

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 $383. If you are unable to visit Key West during the month of September, then departing from Seattle during the month October is also very affordable. Most momondo users find prices during this month for around $433.

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

You could potentially save up to 7% 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 February 2026, prices for Seattle to Key West flights are approximately 29% 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

8h 14m

Direct flights

None
The fastest flight from Seattle to Key West takes 8h 14m
There are no direct flights from Seattle to Key West. There are no popular flight routes from Seattle to Key West.
Search flight deals

  • 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 14m.

  • 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 $328Free CancellationRating
7.2
11,288 reviews
Search American Airlines flights
DeltaPriceFrom $338Free CancellationRating
7.9
8,203 reviews
Search Delta flights
United AirlinesPriceFrom $348Free CancellationRating
7.4
9,289 reviews
Search United Airlines 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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