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Cheap flights from Seattle to Key West from $189

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 1/19. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
6:15 am - 5:13 pmSEA-EYW
7h 58m1 stop
Delta Logo
7:10 am - 2:18 pmEYW-SEA
10h 08m1 stop
$299Delta
Find Deal
mar., ene. 13 - mié., ene. 21
American Airlines Logo
8:35 am - 11:56 pmSEA-EYW
12h 21m2 stops
American Airlines Logo
4:37 pm - 11:42 pmEYW-SEA
10h 05m1 stop
$304American Airlines
Find Deal
mar., ene. 13 - mié., ene. 21
American Airlines Logo
8:35 am - 9:47 pmSEA-EYW
10h 12m2 stops
American Airlines Logo
3:15 pm - 10:07 pmEYW-SEA
9h 52m1 stop
$309American Airlines
Find Deal
lun., ene. 12 - sáb., ene. 17
American Airlines Logo
9:45 pm - 10:57 amSEA-EYW
10h 12m2 stops
American Airlines Logo
2:04 pm - 10:07 pmEYW-SEA
11h 03m1 stop
$314American Airlines
Find Deal
sáb., ene. 17 - sáb., ene. 31
American Airlines Logo
9:45 pm - 1:03 pmSEA-EYW
12h 18m2 stops
American Airlines Logo
6:06 am - 3:34 pmEYW-SEA
12h 28m2 stops
$319American Airlines
Find Deal
sáb., ene. 17 - sáb., ene. 31
American Airlines Logo
6:00 am - 4:24 pmSEA-EYW
7h 24m1 stop
American Airlines Logo
4:37 pm - 11:42 pmEYW-SEA
10h 05m1 stop
$344American Airlines
Find Deal
mié., ene. 28 - lun., feb. 2
United Airlines Logo
11:45 pm - 1:15 pmSEA-EYW
10h 30m1 stop
United Airlines Logo
4:34 pm - 9:49 amEYW-SEA
20h 15m2 stops
$453United Airlines
Find Deal
dom., feb. 22 - sáb., feb. 28
United Airlines Logo
11:45 pm - 1:15 pmSEA-EYW
10h 30m1 stop
United Airlines Logo
4:34 pm - 9:49 amEYW-SEA
20h 15m2 stops
$516United Airlines
Find Deal
dom., feb. 22 - sáb., feb. 28
Delta Logo
6:00 am - 5:23 pmSEA-EYW
8h 23m1 stop
Delta Logo
6:10 pm - 8:31 amEYW-SEA
17h 21m2 stops
$531Delta
Find Deal
dom., nov. 23 - mar., dic. 2
United Airlines Logo
11:45 pm - 1:15 pmSEA-EYW
10h 30m1 stop
United Airlines Logo
4:34 pm - 11:03 pmEYW-SEA
9h 29m1 stop
$534United Airlines
Find Deal
dom., feb. 22 - sáb., feb. 28

American Airlines flights from Seattle to Key West

Our best American Airlines deals on Seattle to Key West flight tickets
American Airlines
Jan 13
SEA8:35 amSeattle/Tacoma Intl
12h 21m
2 stops
EYW11:56 pmKey West
Jan 21
EYW4:37 pmKey West
10h 05m
1 stop
SEA11:42 pmSeattle/Tacoma Intl
$304
Find similar
American Airlines
Jan 12
SEA8:35 amSeattle/Tacoma Intl
10h 12m
2 stops
EYW9:47 pmKey West
Jan 17
EYW3:15 pmKey West
9h 52m
1 stop
SEA10:07 pmSeattle/Tacoma Intl
$309
Find similar
American Airlines
Jan 17
SEA9:45 pmSeattle/Tacoma Intl
10h 12m
2 stops
EYW10:57 amKey West
Jan 31
EYW2:04 pmKey West
11h 03m
1 stop
SEA10:07 pmSeattle/Tacoma Intl
$314
Find similar

Delta flights from Seattle to Key West

Our best Delta deals on Seattle to Key West flight tickets
Delta
Jan 13
SEA6:15 amSeattle/Tacoma Intl
7h 58m
1 stop
EYW5:13 pmKey West
Jan 21
EYW7:10 amKey West
10h 08m
1 stop
SEA2:18 pmSeattle/Tacoma Intl
$299
Find similar
Delta
Nov 8
SEA6:00 amSeattle/Tacoma Intl
8h 21m
1 stop
EYW5:21 pmKey West
Nov 12
EYW6:18 pmKey West
8h 41m
1 stop
SEA11:59 pmSeattle/Tacoma Intl
$489
Find similar
Delta
Nov 8
SEA6:00 amSeattle/Tacoma Intl
8h 21m
1 stop
EYW5:21 pmKey West
Nov 12
EYW6:18 pmKey West
8h 41m
1 stop
SEA11:59 pmSeattle/Tacoma Intl
$497
Find similar

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 noviembre 3, 2025.
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

mar. 1/13

6:15 am-5:13 pm

1 stop7h 58m

Key West

mié. 1/21

7:10 am-2:18 pm

1 stop10h 08m

$299

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

mar. 1/13

8:35 am-11:56 pm

2 stops12h 21m

Key West

mié. 1/21

4:37 pm-11:42 pm

1 stop10h 05m

$304

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

lun. 1/12

8:35 am-9:47 pm

2 stops10h 12m

Key West

sáb. 1/17

3:15 pm-10:07 pm

1 stop9h 52m

$309

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

sáb. 1/17

9:45 pm-10:57 am

2 stops10h 12m

Key West

sáb. 1/31

2:04 pm-10:07 pm

1 stop11h 03m

$314

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

sáb. 1/17

9:45 pm-1:03 pm

2 stops12h 18m

Key West

sáb. 1/31

6:06 am-3:34 pm

2 stops12h 28m

$319

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

mié. 1/28

6:00 am-4:24 pm

1 stop7h 24m

Key West

lun. 2/2

4:37 pm-11:42 pm

1 stop10h 05m

$344

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

dom. 2/22

11:45 pm-1:15 pm

1 stop10h 30m

Key West

sáb. 2/28

4:34 pm-9:49 am

2 stops20h 15m

$453

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

dom. 2/22

11:45 pm-1:15 pm

1 stop10h 30m

Key West

sáb. 2/28

4:34 pm-9:49 am

2 stops20h 15m

$516

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

dom. 11/23

6:00 am-5:23 pm

1 stop8h 23m

Key West

mar. 12/2

6:10 pm-8:31 am

2 stops17h 21m

$531

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

dom. 2/22

11:45 pm-1:15 pm

1 stop10h 30m

Key West

sáb. 2/28

4:34 pm-11:03 pm

1 stop9h 29m

$534

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 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 $458.

What is the cheapest day to depart on your flight to Key West?

On average, the least expensive day to fly to Key West from Seattle is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $597. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Key West for around $940.

What is the cheapest time of day to depart on your flight to Key West?

According to our data, the cheapest time of day to fly to Key West is in the morning. momondo users have found flights departing from Seattle to Key West in the morning for as low as $674. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Key West are more costly in the evening, with an average ticket price of $756. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight to Key West?

You are more likely to see cheaper flights to Key West from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Key West for around $611 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Key West from Seattle for as low as $361 on momondo.

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

Direct flights

None
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 7h 20m.

  • 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
United AirlinesPriceFrom $278Free CancellationRating
7.4
8,997 reviews
Search United Airlines flights
American AirlinesPriceFrom $308Free CancellationRating
7.2
11,038 reviews
Search American Airlines flights
DeltaPriceFrom $338Free CancellationRating
7.9
8,002 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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