What airlines fly to Key West?

American Airlines, Delta and United Airlines are the top three most popular airlines that fly to Key West from Seattle according to our data. American Airlines is the first choice among our users, with 74% of people opting to fly with this airline when traveling to Key West. Keep in mind that there are 3 different airlines that fly to Key West on a routine basis, so you have a few additional options to choose from.

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?

The number of operators available for flights from Seattle/Tacoma Intl Airport to Key West Airport is 3 as of September 2025.

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.

$309 Cheap Flights from Seattle to Key West in 2025/26

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Find the cheapest flights from Seattle to Key West

Round-trip

One-way

Last minute

Cheap round-trip flights

6:00 am - 7:44 pmSEA-EYW

10h 44m1 stop

7:00 am - 2:54 pmEYW-SEA

10h 54m1 stop

$309Delta

Find Deal

Tue, Jan 13 - Wed, Jan 21

12:27 am - 3:18 pmSEA-EYW

11h 51m2 stops

8:10 am - 5:24 pmEYW-SEA

12h 14m1 stop

$314American Airlines

Find Deal

Mon, Jan 12 - Fri, Jan 23

12:27 am - 3:18 pmSEA-EYW

11h 51m2 stops

1:24 pm - 10:19 pmEYW-SEA

11h 55m2 stops

$319American Airlines

Find Deal

Mon, Jan 12 - Fri, Jan 23

12:27 am - 3:18 pmSEA-EYW

11h 51m2 stops

1:24 pm - 10:19 pmEYW-SEA

11h 55m2 stops

$359American Airlines

Find Deal

Mon, Jan 12 - Wed, Jan 21

11:56 pm - 11:59 amSEA-EYW

10h 03m1 stop

4:59 pm - 11:42 pmEYW-SEA

9h 43m1 stop

$389American Airlines

Find Deal

Sat, Nov 1 - Sat, Nov 8

11:56 pm - 1:03 pmSEA-EYW

11h 07m2 stops

2:36 pm - 8:59 pmEYW-SEA

9h 23m1 stop

$394American Airlines

Find Deal

Sat, Nov 1 - Sat, Nov 8

6:00 am - 5:15 pmSEA-EYW

8h 15m1 stop

6:10 pm - 11:54 pmEYW-SEA

8h 44m1 stop

$465Delta

Find Deal

Tue, Sep 30 - Sat, Oct 4

11:50 pm - 2:04 pmSEA-EYW

11h 14m1 stop

4:00 pm - 11:30 amEYW-SEA

22h 30m1 stop

$486United Airlines

Find Deal

Sun, Nov 2 - Fri, Nov 7

11:50 pm - 2:04 pmSEA-EYW

11h 14m1 stop

4:00 pm - 8:51 pmEYW-SEA

31h 51m3 stops

$517United Airlines

Find Deal

Sun, Nov 2 - Fri, Nov 7

11:50 pm - 2:04 pmSEA-EYW

11h 14m1 stop

4:00 pm - 8:23 amEYW-SEA

19h 23m2 stops

$561United Airlines

Find Deal

Mon, Nov 3 - Fri, Nov 7

Delta flights from Seattle to Key West

Our best Delta deals on Seattle to Key West flight tickets

Delta

Jan 13

SEA6:00 amSeattle/Tacoma Intl

10h 44m

1 stop

EYW7:44 pmKey West

Jan 21

EYW7:00 amKey West

10h 54m

1 stop

SEA2:54 pmSeattle/Tacoma Intl

$309

Find similar

Delta

Sep 30

SEA6:00 amSeattle/Tacoma Intl

8h 15m

1 stop

EYW5:15 pmKey West

Oct 4

EYW6:10 pmKey West

8h 44m

1 stop

SEA11:54 pmSeattle/Tacoma Intl

$465

Find similar

Delta

Mar 10

SEA6:00 amSeattle/Tacoma Intl

10h 44m

1 stop

EYW7:44 pmKey West

Mar 11

EYW6:00 pmKey West

9h 16m

1 stop

SEA12:16 amSeattle/Tacoma Intl

$537

Find similar

American Airlines flights from Seattle to Key West

Our best American Airlines deals on Seattle to Key West flight tickets

American Airlines

Jan 12

SEA12:27 amSeattle/Tacoma Intl

11h 51m

2 stops

EYW3:18 pmKey West

Jan 23

EYW8:10 amKey West

12h 14m

1 stop

SEA5:24 pmSeattle/Tacoma Intl

$314

Find similar

American Airlines

Jan 12

SEA12:27 amSeattle/Tacoma Intl

11h 51m

2 stops

EYW3:18 pmKey West

Jan 23

EYW1:24 pmKey West

11h 55m

2 stops

SEA10:19 pmSeattle/Tacoma Intl

$319

Find similar

American Airlines

Jan 12

SEA12:27 amSeattle/Tacoma Intl

11h 51m

2 stops

EYW3:18 pmKey West

Jan 21

EYW1:24 pmKey West

11h 55m

2 stops

SEA10:19 pmSeattle/Tacoma Intl

$359

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Tue 1/13

6:00 am-7:44 pm

1 stop10h 44m

Key West

Wed 1/21

7:00 am-2:54 pm

1 stop10h 54m

$309

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Mon 1/12

12:27 am-3:18 pm

2 stops11h 51m

Key West

Fri 1/23

8:10 am-5:24 pm

1 stop12h 14m

$314

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Mon 1/12

12:27 am-3:18 pm

2 stops11h 51m

Key West

Fri 1/23

1:24 pm-10:19 pm

2 stops11h 55m

$319

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Mon 1/12

12:27 am-3:18 pm

2 stops11h 51m

Key West

Wed 1/21

1:24 pm-10:19 pm

2 stops11h 55m

$359

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Sat 11/1

11:56 pm-11:59 am

1 stop10h 03m

Key West

Sat 11/8

4:59 pm-11:42 pm

1 stop9h 43m

$389

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Sat 11/1

11:56 pm-1:03 pm

2 stops11h 07m

Key West

Sat 11/8

2:36 pm-8:59 pm

1 stop9h 23m

$394

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Tue 9/30

6:00 am-5:15 pm

1 stop8h 15m

Key West

Sat 10/4

6:10 pm-11:54 pm

1 stop8h 44m

$465

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Sun 11/2

11:50 pm-2:04 pm

1 stop11h 14m

Key West

Fri 11/7

4:00 pm-11:30 am

1 stop22h 30m

$486

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Sun 11/2

11:50 pm-2:04 pm

1 stop11h 14m

Key West

Fri 11/7

4:00 pm-8:51 pm

3 stops31h 51m

$517

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Mon 11/3

11:50 pm-2:04 pm

1 stop11h 14m

Key West

Fri 11/7

4:00 pm-8:23 am

2 stops19h 23m

$561

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

Prices

Airlines

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 January is also very affordable. Most momondo users find prices during this month for around $483.

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 $621 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 32m.
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?
The number of operators available for flights from Seattle/Tacoma Intl Airport to Key West Airport is 3 as of September 2025.
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?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Seattle to Key West is American Airlines (74% of total bookings). The next most popular airlines are Delta (17%) and United Airlines (9%).

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 Airlines	PriceFrom $278	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights
American Airlines	PriceFrom $308	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Delta	PriceFrom $338	Free Cancellation	Rating 7.9 7,961 reviews	Search Delta flights

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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.