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

American Airlines and Delta 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 August 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.

$212 Cheap Flights from Key West to Seattle in 2026

Discover deals from 900+ travel sites with momondo.

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.

2:20 pm - 11:36 pmEYW Key West-SEA Seattle/Tacoma Intl

12h 16m1 stop Newark

10:58 pm - 1:29 pmSEA Seattle/Tacoma Intl-EYW Key West

11h 31m1 stop Newark

$449United Airlines

Thu, Sep 10 - Mon, Sep 14

2:15 pm - 8:07 pmEYW Key West-SEA Seattle/Tacoma Intl

8h 52m1 stop Charlotte Douglas

11:57 pm - 2:49 pmSEA Seattle/Tacoma Intl-EYW Key West

11h 52m2 stops Chicago O'Hare Intl Charlotte Douglas

$637American Airlines

Thu, Sep 10 - Mon, Sep 14

10:21 am - 7:48 pmEYW Key West-SEA Seattle/Tacoma Intl

12h 27m2 stops Miami Dallas/Fort Worth

11:57 pm - 1:17 pmSEA Seattle/Tacoma Intl-EYW Key West

10h 20m2 stops Chicago O'Hare Intl Miami

$835American Airlines

Thu, Sep 10 - Mon, Sep 14

7:40 am - 1:44 pmEYW Key West-SEA Seattle/Tacoma Intl

9h 04m1 stop Atlanta Hartsfield-Jackson

11:59 pm - 10:46 amSEA Seattle/Tacoma Intl-EYW Key West

7h 47m1 stop Atlanta Hartsfield-Jackson

$885Delta

Wed, Sep 9 - Fri, Sep 11

2:00 pm - 9:15 pmEYW Key West-SEA Seattle/Tacoma Intl

10h 15m1 stop Atlanta Hartsfield-Jackson

11:59 pm - 10:46 amSEA Seattle/Tacoma Intl-EYW Key West

7h 47m1 stop Atlanta Hartsfield-Jackson

$885Delta

Wed, Sep 9 - Fri, Sep 11

2:15 pm - 9:55 pmEYW Key West-SEA Seattle/Tacoma Intl

10h 40m1 stop Newark

10:48 pm - 1:29 pmSEA Seattle/Tacoma Intl-EYW Key West

11h 41m1 stop Newark

$885United Airlines

Wed, Oct 14 - Sat, Oct 17

11:30 am - 10:40 pmEYW Key West-SEA Seattle/Tacoma Intl

14h 10m2 stops Miami Los Angeles

8:50 pm - 9:51 amSEA Seattle/Tacoma Intl-EYW Key West

10h 01m1 stop Miami

$890American Airlines

Wed, Sep 9 - Fri, Sep 11

1:47 pm - 9:52 pmEYW Key West-SEA Seattle/Tacoma Intl

11h 05m2 stops Miami Dallas/Fort Worth

6:40 am - 5:55 pmSEA Seattle/Tacoma Intl-EYW Key West

8h 15m1 stop Charlotte Douglas

$890American Airlines

Wed, Sep 9 - Fri, Sep 11

11:30 am - 10:40 pmEYW Key West-SEA Seattle/Tacoma Intl

14h 10m2 stops Miami Los Angeles

10:36 pm - 1:17 pmSEA Seattle/Tacoma Intl-EYW Key West

11h 41m2 stops Charlotte Douglas Miami

$896American Airlines

Wed, Sep 9 - Fri, Sep 11

2:15 pm - 9:55 pmEYW Key West-SEA Seattle/Tacoma Intl

10h 40m1 stop Newark

10:48 pm - 1:29 pmSEA Seattle/Tacoma Intl-EYW Key West

11h 41m1 stop Newark

$962United Airlines

Wed, Oct 14 - Sat, Oct 17

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United Airlines flights from Key West to Seattle

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

United Airlines

Sep 10

EYW2:20 pmKey West

12h 16m

1 stop

SEA11:36 pmSeattle/Tacoma Intl

Sep 14

SEA10:58 pmSeattle/Tacoma Intl

11h 31m

1 stop

EYW1:29 pmKey West

$449

United Airlines

Oct 14

EYW2:15 pmKey West

10h 40m

1 stop

SEA9:55 pmSeattle/Tacoma Intl

Oct 17

SEA10:48 pmSeattle/Tacoma Intl

11h 41m

1 stop

EYW1:29 pmKey West

$962

United Airlines

Oct 14

EYW2:15 pmKey West

10h 40m

1 stop

SEA9:55 pmSeattle/Tacoma Intl

Oct 17

SEA7:11 amSeattle/Tacoma Intl

27h 18m

2 stops

EYW1:29 pmKey West

$964

American Airlines flights from Key West to Seattle

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

American Airlines

Sep 10

EYW2:15 pmKey West

8h 52m

1 stop

SEA8:07 pmSeattle/Tacoma Intl

Sep 14

SEA11:57 pmSeattle/Tacoma Intl

11h 52m

2 stops

EYW2:49 pmKey West

$637

American Airlines

Sep 10

EYW10:21 amKey West

12h 27m

2 stops

SEA7:48 pmSeattle/Tacoma Intl

Sep 14

SEA11:57 pmSeattle/Tacoma Intl

10h 20m

2 stops

EYW1:17 pmKey West

$835

American Airlines

Sep 9

EYW11:30 amKey West

14h 10m

2 stops

SEA10:40 pmSeattle/Tacoma Intl

Sep 11

SEA8:50 pmSeattle/Tacoma Intl

10h 01m

1 stop

EYW9:51 amKey West

$890

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Key WestSeattle

EYW Key West - SEA Seattle/Tacoma Intl

EYWSEA

Key West

Thu 9/10

2:20 pm-11:36 pm

1 stop12h 16m

Seattle/Tacoma Intl

Mon 9/14

10:58 pm-1:29 pm

1 stop11h 31m

$449

Key WestSeattle

EYW Key West - SEA Seattle/Tacoma Intl

EYWSEA

Key West

Thu 9/10

2:15 pm-8:07 pm

1 stop8h 52m

Seattle/Tacoma Intl

Mon 9/14

11:57 pm-2:49 pm

2 stops11h 52m

$637

Key WestSeattle

EYW Key West - SEA Seattle/Tacoma Intl

EYWSEA

Key West

Thu 9/10

10:21 am-7:48 pm

2 stops12h 27m

Seattle/Tacoma Intl

Mon 9/14

11:57 pm-1:17 pm

2 stops10h 20m

$835

Quickest round-trip

Key WestSeattle

EYW Key West - SEA Seattle/Tacoma Intl

EYWSEA

Key West

Wed 9/9

7:40 am-1:44 pm

1 stop9h 04m

Seattle/Tacoma Intl

Fri 9/11

11:59 pm-10:46 am

1 stop7h 47m

$885

Key WestSeattle

EYW Key West - SEA Seattle/Tacoma Intl

EYWSEA

Key West

Wed 9/9

2:00 pm-9:15 pm

1 stop10h 15m

Seattle/Tacoma Intl

Fri 9/11

11:59 pm-10:46 am

1 stop7h 47m

$885

Key WestSeattle

EYW Key West - SEA Seattle/Tacoma Intl

EYWSEA

Key West

Wed 10/14

2:15 pm-9:55 pm

1 stop10h 40m

Seattle/Tacoma Intl

Sat 10/17

10:48 pm-1:29 pm

1 stop11h 41m

$885

Key WestSeattle

EYW Key West - SEA Seattle/Tacoma Intl

EYWSEA

Key West

Wed 9/9

11:30 am-10:40 pm

2 stops14h 10m

Seattle/Tacoma Intl

Fri 9/11

8:50 pm-9:51 am

1 stop10h 01m

$890

Key WestSeattle

EYW Key West - SEA Seattle/Tacoma Intl

EYWSEA

Key West

Wed 9/9

1:47 pm-9:52 pm

2 stops11h 05m

Seattle/Tacoma Intl

Fri 9/11

6:40 am-5:55 pm

1 stop8h 15m

$890

Key WestSeattle

EYW Key West - SEA Seattle/Tacoma Intl

EYWSEA

Key West

Wed 9/9

11:30 am-10:40 pm

2 stops14h 10m

Seattle/Tacoma Intl

Fri 9/11

10:36 pm-1:17 pm

2 stops11h 41m

$896

Key WestSeattle

EYW Key West - SEA Seattle/Tacoma Intl

EYWSEA

Key West

Wed 10/14

2:15 pm-9:55 pm

1 stop10h 40m

Seattle/Tacoma Intl

Sat 10/17

10:48 pm-1:29 pm

1 stop11h 41m

$962

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 cheapest month to fly to Seattle?

In general, October is the cheapest month to fly from Key West to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you don’t want to visit Seattle in October, then you should wait until May to fly from Key West, when ticket prices are also cheap, with an average price of $0.

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

Best Price Found	$212
Fastest flight time	10h 40m
Direct flights	None

The best one-way flight to Seattle from Key West in the past 72 hours is $212. The best round-trip flight deal from Key West to Seattle found on momondo in the last 72 hours is $449.

The fastest flight from Key West to Seattle takes 10h 40m

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. 10h 40m 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 August 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 12,011 reviews		Search American Airlines flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Kent

Olympia

Redmond

Lynnwood

Lakewood

Federal Way

Puyallup

Tukwila

Fife

Cle Elum

Marysville

Kirkland

Shoreline

Centralia

Lacey

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.