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

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

When did momondo last update prices for flights from Key West Airport to Seattle/Tacoma Intl Airport?

Prices for flights from Key West Airport to Seattle/Tacoma Intl Airport were last updated today.

How many operators does momondo search for flights from Key West Airport to Seattle/Tacoma Intl Airport?

The number of operators available for flights from Key West Airport to Seattle/Tacoma Intl Airport is 1 as of April 2026.

How old do you have to be to fly from Key West Airport to Seattle/Tacoma Intl Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Key West Airport to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$174 Cheap Flights from Key West to Seattle in 2026

Q: What is the typical price of a round-trip flight between Key West and Seattle?

Prices are currently low for flights on this route. Typical prices usually range from $621 to $475. The lowest price recently found on this route was $389.

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Find the cheapest flights from Key West to Seattle

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:23 pm - 11:53 pm

EYW

SEA

8h 30m

1 stop

9:45 pm - 10:46 am

SEA

EYW

10h 01m

1 stop

$389Delta

Fri, Apr 24 - Sun, May 3

4:20 pm - 12:44 am

EYW

SEA

11h 24m

2 stops

6:00 am - 5:02 pm

SEA

EYW

8h 02m

1 stop

$394American Airlines

Fri, Apr 24 - Sun, May 3

4:20 pm - 12:44 am

EYW

SEA

11h 24m

2 stops

12:59 am - 4:30 pm

SEA

EYW

12h 31m

2 stops

$399American Airlines

Fri, Apr 24 - Sat, May 2

2:40 pm - 10:05 pm

EYW

SEA

10h 25m

1 stop

6:00 am - 5:23 pm

SEA

EYW

8h 23m

1 stop

$449Delta

Tue, Apr 14 - Sat, Apr 18

3:58 pm - 12:44 am

EYW

SEA

11h 46m

2 stops

6:00 am - 6:49 pm

SEA

EYW

9h 49m

1 stop

$454American Airlines

Thu, Apr 16 - Sun, Apr 19

3:58 pm - 12:44 am

EYW

SEA

11h 46m

2 stops

10:29 pm - 10:54 am

SEA

EYW

9h 25m

2 stops

$459American Airlines

Thu, Apr 16 - Sun, Apr 19

2:29 pm - 10:58 pm

EYW

SEA

11h 29m

2 stops

6:00 am - 5:02 pm

SEA

EYW

8h 02m

1 stop

$489American Airlines

Fri, Apr 17 - Tue, Apr 21

6:19 pm - 11:59 pm

EYW

SEA

8h 40m

1 stop

9:35 pm - 5:23 pm

SEA

EYW

16h 48m

1 stop

$497Delta

Thu, May 14 - Wed, May 20

3:52 pm - 10:42 pm

EYW

SEA

9h 50m

1 stop

10:55 pm - 1:31 pm

SEA

EYW

11h 36m

1 stop

$499United Airlines

Thu, Apr 23 - Mon, Apr 27

3:58 pm - 11:44 pm

EYW

SEA

10h 46m

1 stop

6:00 am - 10:36 pm

SEA

EYW

13h 36m

2 stops

$504American Airlines

Thu, May 14 - Wed, May 20

United Airlines flights from Key West to Seattle

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

United Airlines

Apr 23

EYW3:52 pmKey West

9h 50m

1 stop

SEA10:42 pmSeattle/Tacoma Intl

Apr 27

SEA10:55 pmSeattle/Tacoma Intl

11h 36m

1 stop

EYW1:31 pmKey West

$499

United Airlines

May 1

EYW4:47 pmKey West

9h 05m

1 stop

SEA10:52 pmSeattle/Tacoma Intl

May 5

SEA11:00 pmSeattle/Tacoma Intl

11h 45m

1 stop

EYW1:45 pmKey West

$529

United Airlines

May 1

EYW4:47 pmKey West

9h 05m

1 stop

SEA10:52 pmSeattle/Tacoma Intl

May 5

SEA8:38 amSeattle/Tacoma Intl

27h 29m

2 stops

EYW3:07 pmKey West

$558

American Airlines flights from Key West to Seattle

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

American Airlines

Apr 24

EYW4:20 pmKey West

11h 24m

2 stops

SEA12:44 amSeattle/Tacoma Intl

May 3

SEA6:00 amSeattle/Tacoma Intl

8h 02m

1 stop

EYW5:02 pmKey West

$394

American Airlines

Apr 24

EYW4:20 pmKey West

11h 24m

2 stops

SEA12:44 amSeattle/Tacoma Intl

May 2

SEA12:59 amSeattle/Tacoma Intl

12h 31m

2 stops

EYW4:30 pmKey West

$399

American Airlines

Apr 16

EYW3:58 pmKey West

11h 46m

2 stops

SEA12:44 amSeattle/Tacoma Intl

Apr 19

SEA6:00 amSeattle/Tacoma Intl

9h 49m

1 stop

EYW6:49 pmKey West

$454

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Fri 4/24

6:23 pm-11:53 pm

1 stop8h 30m

Seattle/Tacoma Intl

Sun 5/3

9:45 pm-10:46 am

1 stop10h 01m

$389

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Fri 4/24

4:20 pm-12:44 am

2 stops11h 24m

Seattle/Tacoma Intl

Sun 5/3

6:00 am-5:02 pm

1 stop8h 02m

$394

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Fri 4/24

4:20 pm-12:44 am

2 stops11h 24m

Seattle/Tacoma Intl

Sat 5/2

12:59 am-4:30 pm

2 stops12h 31m

$399

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Tue 4/14

2:40 pm-10:05 pm

1 stop10h 25m

Seattle/Tacoma Intl

Sat 4/18

6:00 am-5:23 pm

1 stop8h 23m

$449

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Thu 4/16

3:58 pm-12:44 am

2 stops11h 46m

Seattle/Tacoma Intl

Sun 4/19

6:00 am-6:49 pm

1 stop9h 49m

$454

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Thu 4/16

3:58 pm-12:44 am

2 stops11h 46m

Seattle/Tacoma Intl

Sun 4/19

10:29 pm-10:54 am

2 stops9h 25m

$459

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Fri 4/17

2:29 pm-10:58 pm

2 stops11h 29m

Seattle/Tacoma Intl

Tue 4/21

6:00 am-5:02 pm

1 stop8h 02m

$489

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Thu 5/14

6:19 pm-11:59 pm

1 stop8h 40m

Seattle/Tacoma Intl

Wed 5/20

9:35 pm-5:23 pm

1 stop16h 48m

$497

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Thu 4/23

3:52 pm-10:42 pm

1 stop9h 50m

Seattle/Tacoma Intl

Mon 4/27

10:55 pm-1:31 pm

1 stop11h 36m

$499

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Thu 5/14

3:58 pm-11:44 pm

1 stop10h 46m

Seattle/Tacoma Intl

Wed 5/20

6:00 am-10:36 pm

2 stops13h 36m

$504

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 Key West to Seattle

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

When to book flights from Key West to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Key West to Seattle according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Key West to Seattle (EYW to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Key West to Seattle

Fastest flight time	8h 30m
Direct flights	None

The fastest flight from Key West to Seattle takes 8h 30m

There are no direct flights from Key West to Seattle. There are no popular flight routes from Key West to Seattle.

Search flight deals

Frequently asked questions about flying from Key West to Seattle

How far is Key West to Seattle/Tacoma Intl by plane?
The straight-line distance from Key West to Seattle/Tacoma Intl is 2719.2 mi. 8h 30m is a normal flight duration for this route.
When did momondo last update prices for flights from Key West Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Key West Airport to Seattle/Tacoma Intl Airport were last updated today.
How many operators does momondo search for flights from Key West Airport to Seattle/Tacoma Intl Airport?
The number of operators available for flights from Key West Airport to Seattle/Tacoma Intl Airport is 1 as of April 2026.
How old do you have to be to fly from Key West Airport to Seattle/Tacoma Intl Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Key West Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Key West to Seattle?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Key West to Seattle is American Airlines (100% of total bookings).

Best airlines flying from Key West to Seattle

Compare and see reviews for airlines that fly from Key West to Seattle with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $308	Free Cancellation	Rating 7.1 11,551 reviews		Search American Airlines flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Redmond

Marysville

Puyallup

Cle Elum

Lakewood

Tukwila

Federal Way

Centralia

Fife

Westport

Kirkland

Tumwater

Why use momondo?

Why should I use momondo to find a flight deal from Key West to Seattle?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Key West to Seattle. momondo saves you time and could save you money on your trip.

Can I find flights from Key West to Seattle with flexible booking policies on momondo?

momondo does allow users to show only those flights to Seattle from Key West which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Key West to Seattle?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from Key West.

I’m not ready to book a flight from Key West to Seattle right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Key West to Seattle flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.