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Cheap flights from Seattle to Key West from $190

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 9/8. 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.
American Airlines Logo
6:00 am - 6:49 pmSEA  Seattle/Tacoma Intl-EYW Key West
9h 49m1 stop Charlotte Douglas
American Airlines Logo
5:28 pm - 11:59 pmEYW  Key West-SEA Seattle/Tacoma Intl
9h 31m1 stop Miami
$439American Airlines
Wed, Oct 14 - Sat, Oct 17
Delta Logo
11:59 pm - 10:46 amSEA  Seattle/Tacoma Intl-EYW Key West
7h 47m1 stop Atlanta Hartsfield-Jackson
Delta Logo
6:19 pm - 11:58 pmEYW  Key West-SEA Seattle/Tacoma Intl
8h 39m1 stop Atlanta Hartsfield-Jackson
$440Delta
Sat, Sep 26 - Sat, Oct 3
United Airlines Logo
10:48 pm - 1:29 pmSEA  Seattle/Tacoma Intl-EYW Key West
11h 41m1 stop Newark
United Airlines Logo
4:00 pm - 10:56 pmEYW  Key West-SEA Seattle/Tacoma Intl
9h 56m1 stop Chicago O'Hare Intl
$489United Airlines
Sat, Sep 26 - Sat, Oct 3
American Airlines Logo
8:39 pm - 9:54 amSEA  Seattle/Tacoma Intl-EYW Key West
10h 15m1 stop Miami
American Airlines Logo
4:45 pm - 11:10 pmEYW  Key West-SEA Seattle/Tacoma Intl
9h 25m1 stop Charlotte Douglas
$492American Airlines
Fri, Oct 16 - Sat, Oct 24
Delta Logo
6:00 am - 5:23 pmSEA  Seattle/Tacoma Intl-EYW Key West
8h 23m1 stop Atlanta Hartsfield-Jackson
Delta Logo
6:19 pm - 11:58 pmEYW  Key West-SEA Seattle/Tacoma Intl
8h 39m1 stop Atlanta Hartsfield-Jackson
$497Delta
Tue, Sep 8 - Tue, Sep 15
Delta Logo
11:59 pm - 12:26 pmSEA  Seattle/Tacoma Intl-EYW Key West
9h 27m1 stop Atlanta Hartsfield-Jackson
Delta Logo
4:35 pm - 11:58 pmEYW  Key West-SEA Seattle/Tacoma Intl
10h 23m1 stop Atlanta Hartsfield-Jackson
$497Delta
Sat, Sep 5 - Sat, Sep 12
American Airlines Logo
8:39 pm - 9:54 amSEA  Seattle/Tacoma Intl-EYW Key West
10h 15m1 stop Miami
American Airlines Logo
5:01 pm - 12:35 amEYW  Key West-SEA Seattle/Tacoma Intl
10h 34m1 stop Chicago O'Hare Intl
$545American Airlines
Fri, Oct 30 - Sun, Nov 1
American Airlines Logo
7:00 am - 6:01 pmSEA  Seattle/Tacoma Intl-EYW Key West
8h 01m1 stop Charlotte Douglas
American Airlines Logo
2:25 pm - 10:37 pmEYW  Key West-SEA Seattle/Tacoma Intl
11h 12m1 stop Dallas/Fort Worth
$555American Airlines
Thu, Jan 14 - Wed, Jan 20
United Airlines Logo
10:40 pm - 11:11 amSEA  Seattle/Tacoma Intl-EYW Key West
9h 31m1 stop Chicago O'Hare Intl
United Airlines Logo
4:05 pm - 10:29 pmEYW  Key West-SEA Seattle/Tacoma Intl
9h 24m1 stop Chicago O'Hare Intl
$579United Airlines
Fri, Dec 4 - Mon, Dec 7
Multiple Airlines Logo
7:07 pm - 11:06 amSEA  Seattle/Tacoma Intl-EYW Key West
12h 59m2 stops Denver Intl Tampa
Multiple Airlines Logo
12:59 pm - 3:08 pmEYW  Key West-SEA Seattle/Tacoma Intl
29h 09m2 stops Tampa Denver Intl
$589Multiple Airlines
Tue, Sep 1 - Mon, Sep 14

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American Airlines flights from Seattle to Key West

Our best American Airlines deals on Seattle to Key West flight tickets
American Airlines
Oct 14
SEA6:00 amSeattle/Tacoma Intl
9h 49m
1 stop
EYW6:49 pmKey West
Oct 17
EYW5:28 pmKey West
9h 31m
1 stop
SEA11:59 pmSeattle/Tacoma Intl
$439
American Airlines
Oct 16
SEA8:39 pmSeattle/Tacoma Intl
10h 15m
1 stop
EYW9:54 amKey West
Oct 24
EYW4:45 pmKey West
9h 25m
1 stop
SEA11:10 pmSeattle/Tacoma Intl
$492
American Airlines
Oct 30
SEA8:39 pmSeattle/Tacoma Intl
10h 15m
1 stop
EYW9:54 amKey West
Nov 1
EYW5:01 pmKey West
10h 34m
1 stop
SEA12:35 amSeattle/Tacoma Intl
$545

Delta flights from Seattle to Key West

Our best Delta deals on Seattle to Key West flight tickets
Delta
Sep 26
SEA11:59 pmSeattle/Tacoma Intl
7h 47m
1 stop
EYW10:46 amKey West
Oct 3
EYW6:19 pmKey West
8h 39m
1 stop
SEA11:58 pmSeattle/Tacoma Intl
$440
Delta
Sep 5
SEA11:59 pmSeattle/Tacoma Intl
9h 27m
1 stop
EYW12:26 pmKey West
Sep 12
EYW4:35 pmKey West
10h 23m
1 stop
SEA11:58 pmSeattle/Tacoma Intl
$497
Delta
Sep 11
SEA8:59 amSeattle/Tacoma Intl
8h 01m
1 stop
EYW8:00 pmKey West
Sep 18
EYW6:19 pmKey West
8h 39m
1 stop
SEA11:58 pmSeattle/Tacoma Intl
$619

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 August 14, 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 Seattle/Tacoma Intl - EYW Key West

SEAEYW

Seattle/Tacoma Intl

Wed 10/14

6:00 am-6:49 pm

1 stop9h 49m

Key West

Sat 10/17

5:28 pm-11:59 pm

1 stop9h 31m

$439
Quickest round-trip

SeattleKey West

SEA Seattle/Tacoma Intl - EYW Key West

SEAEYW

Seattle/Tacoma Intl

Sat 9/26

11:59 pm-10:46 am

1 stop7h 47m

Key West

Sat 10/3

6:19 pm-11:58 pm

1 stop8h 39m

$440

SeattleKey West

SEA Seattle/Tacoma Intl - EYW Key West

SEAEYW

Seattle/Tacoma Intl

Sat 9/26

10:48 pm-1:29 pm

1 stop11h 41m

Key West

Sat 10/3

4:00 pm-10:56 pm

1 stop9h 56m

$489

SeattleKey West

SEA Seattle/Tacoma Intl - EYW Key West

SEAEYW

Seattle/Tacoma Intl

Fri 10/16

8:39 pm-9:54 am

1 stop10h 15m

Key West

Sat 10/24

4:45 pm-11:10 pm

1 stop9h 25m

$492

SeattleKey West

SEA Seattle/Tacoma Intl - EYW Key West

SEAEYW

Seattle/Tacoma Intl

Tue 9/8

6:00 am-5:23 pm

1 stop8h 23m

Key West

Tue 9/15

6:19 pm-11:58 pm

1 stop8h 39m

$497

SeattleKey West

SEA Seattle/Tacoma Intl - EYW Key West

SEAEYW

Seattle/Tacoma Intl

Sat 9/5

11:59 pm-12:26 pm

1 stop9h 27m

Key West

Sat 9/12

4:35 pm-11:58 pm

1 stop10h 23m

$497

SeattleKey West

SEA Seattle/Tacoma Intl - EYW Key West

SEAEYW

Seattle/Tacoma Intl

Fri 10/30

8:39 pm-9:54 am

1 stop10h 15m

Key West

Sun 11/1

5:01 pm-12:35 am

1 stop10h 34m

$545

SeattleKey West

SEA Seattle/Tacoma Intl - EYW Key West

SEAEYW

Seattle/Tacoma Intl

Thu 1/14

7:00 am-6:01 pm

1 stop8h 01m

Key West

Wed 1/20

2:25 pm-10:37 pm

1 stop11h 12m

$555

SeattleKey West

SEA Seattle/Tacoma Intl - EYW Key West

SEAEYW

Seattle/Tacoma Intl

Fri 12/4

10:40 pm-11:11 am

1 stop9h 31m

Key West

Mon 12/7

4:05 pm-10:29 pm

1 stop9h 24m

$579

SeattleKey West

SEA Seattle/Tacoma Intl - EYW Key West

SEAEYW

Seattle/Tacoma Intl

Tue 9/1

7:07 pm-11:06 am

2 stops12h 59m

Key West

Mon 9/14

12:59 pm-3:08 pm

2 stops29h 09m

$589

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

Prices are currently typical for flights on this route.

Typical prices usually range from $428 to $1,046.
The lowest price recently found on this route was $439.

What is the cheapest month to fly to Key West?

In general, July 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 $388. If you are unable to visit Key West during the month of July, then departing from Seattle during the month September is also very affordable. Most momondo users find prices during this month for around $403.

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

You could potentially save up to 28% 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

7h 47m

Direct flights

None
The fastest flight from Seattle to Key West takes 7h 47m
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 7h 47m.

  • 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
7.1
11,929 reviews
Search American Airlines flights
DeltaPriceFrom $338Free CancellationRating
7.8
8,502 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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