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 69% 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.

What is the cheapest airline that flies from Seattle/Tacoma Intl to Key West?

American Airlines and Delta are the most popular carriers operating from Seattle/Tacoma Intl to Key West

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 January 2026.

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.

$161 Cheap Flights from Seattle to Key West in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Seattle to Key West

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:00 am - 6:01 pm

SEA

EYW

8h 01m1 stop

3:15 pm - 10:07 pm

EYW

SEA

9h 52m1 stop

$329American Airlines

mié., ene. 28 - sáb., ene. 31

10:00 am - 11:56 pm

SEA

EYW

10h 56m2 stops

2:58 pm - 9:47 pm

EYW

SEA

9h 49m1 stop

$334American Airlines

mar., feb. 3 - mar., feb. 10

10:00 am - 11:56 pm

SEA

EYW

10h 56m2 stops

6:06 am - 3:34 pm

EYW

SEA

12h 28m2 stops

$340American Airlines

mar., feb. 3 - mar., feb. 10

7:00 am - 6:01 pm

SEA

EYW

8h 01m1 stop

3:15 pm - 10:07 pm

EYW

SEA

9h 52m1 stop

$354American Airlines

mar., feb. 3 - sáb., feb. 7

7:00 am - 6:06 pm

SEA

EYW

8h 06m1 stop

3:15 pm - 10:07 pm

EYW

SEA

9h 52m1 stop

$359American Airlines

sáb., ene. 24 - sáb., ene. 31

9:45 pm - 1:03 pm

SEA

EYW

12h 18m2 stops

3:15 pm - 10:07 pm

EYW

SEA

9h 52m1 stop

$364American Airlines

sáb., ene. 24 - sáb., ene. 31

10:00 am - 11:56 pm

SEA

EYW

10h 56m2 stops

6:06 am - 3:34 pm

EYW

SEA

12h 28m2 stops

$370American Airlines

mar., ene. 20 - mar., feb. 10

6:00 am - 4:24 pm

SEA

EYW

7h 24m1 stop

2:43 pm - 9:59 pm

EYW

SEA

10h 16m1 stop

$379American Airlines

mié., feb. 4 - dom., feb. 8

9:55 am - 11:25 am

SEA

EYW

22h 30m2 stops

2:45 pm - 11:17 pm

EYW

SEA

11h 32m1 stop

$407Delta

sáb., feb. 7 - mié., feb. 11

10:57 pm - 2:05 pm

SEA

EYW

12h 08m1 stop

2:39 pm - 9:15 pm

EYW

SEA

9h 36m1 stop

$417American Airlines

sáb., feb. 28 - sáb., mar. 7

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 5

EYW2:24 pmKey West

11h 29m

1 stop

SEA10:53 pmSeattle/Tacoma Intl

$429

United Airlines

Feb 28

SEA11:35 pmSeattle/Tacoma Intl

10h 43m

1 stop

EYW1:18 pmKey West

Mar 2

EYW2:15 pmKey West

12h 36m

1 stop

SEA11:51 pmSeattle/Tacoma Intl

$449

United Airlines

Feb 7

SEA7:00 amSeattle/Tacoma Intl

30h 22m

2 stops

EYW4:22 pmKey West

Feb 11

EYW2:25 pmKey West

11h 54m

1 stop

SEA11:19 pmSeattle/Tacoma Intl

$470

American Airlines flights from Seattle to Key West

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

American Airlines

Jan 28

SEA7:00 amSeattle/Tacoma Intl

8h 01m

1 stop

EYW6:01 pmKey West

Jan 31

EYW3:15 pmKey West

9h 52m

1 stop

SEA10:07 pmSeattle/Tacoma Intl

$329

American Airlines

Feb 3

SEA10:00 amSeattle/Tacoma Intl

10h 56m

2 stops

EYW11:56 pmKey West

Feb 10

EYW2:58 pmKey West

9h 49m

1 stop

SEA9:47 pmSeattle/Tacoma Intl

$334

American Airlines

Feb 3

SEA8:35 amSeattle/Tacoma Intl

12h 21m

2 stops

EYW11:56 pmKey West

Feb 7

EYW6:06 amKey West

12h 28m

2 stops

SEA3:34 pmSeattle/Tacoma Intl

$340

Fly from

Fly to

Route

Depart

Return

Price

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

mié. 1/28

7:00 am-6:01 pm

1 stop8h 01m

Key West

sáb. 1/31

3:15 pm-10:07 pm

1 stop9h 52m

$329

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

mar. 2/3

10:00 am-11:56 pm

2 stops10h 56m

Key West

mar. 2/10

2:58 pm-9:47 pm

1 stop9h 49m

$334

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

mar. 2/3

10:00 am-11:56 pm

2 stops10h 56m

Key West

mar. 2/10

6:06 am-3:34 pm

2 stops12h 28m

$340

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

mar. 2/3

7:00 am-6:01 pm

1 stop8h 01m

Key West

sáb. 2/7

3:15 pm-10:07 pm

1 stop9h 52m

$354

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

sáb. 1/24

7:00 am-6:06 pm

1 stop8h 06m

Key West

sáb. 1/31

3:15 pm-10:07 pm

1 stop9h 52m

$359

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

sáb. 1/24

9:45 pm-1:03 pm

2 stops12h 18m

Key West

sáb. 1/31

3:15 pm-10:07 pm

1 stop9h 52m

$364

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

mar. 1/20

10:00 am-11:56 pm

2 stops10h 56m

Key West

mar. 2/10

6:06 am-3:34 pm

2 stops12h 28m

$370

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

mié. 2/4

6:00 am-4:24 pm

1 stop7h 24m

Key West

dom. 2/8

2:43 pm-9:59 pm

1 stop10h 16m

$379

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

sáb. 2/7

9:55 am-11:25 am

2 stops22h 30m

Key West

mié. 2/11

2:45 pm-11:17 pm

1 stop11h 32m

$407

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

sáb. 2/28

10:57 pm-2:05 pm

1 stop12h 08m

Key West

sáb. 3/7

2:39 pm-9:15 pm

1 stop9h 36m

$417

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted 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 March is also very affordable. Most momondo users find prices during this month for around $451.

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 18m
Direct flights	None

The fastest flight from Seattle to Key West takes 8h 18m

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 18m.
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 January 2026.
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 (69% of total bookings). The next most popular airlines are Delta (21%) 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 9,139 reviews	Search United Airlines flights
American Airlines	PriceFrom $314	Free Cancellation	Rating 7.2 11,095 reviews	Search American Airlines flights
Delta	PriceFrom $338	Free Cancellation	Rating 7.9 8,025 reviews	Search Delta flights

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.