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

Delta, American Airlines, and Alaska 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 August 2025.

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.

$192 Cheap Flights from Key West to Seattle in 2025

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Find the cheapest flights from Key West to Seattle

Round-trip

One-way

Cheap round-trip flights

6:17 pm - 11:54 pmEYW-SEA

8h 37m1 stop

9:55 pm - 11:27 amSEA-EYW

10h 32m1 stop

$309Delta

Find Deal

Wed, Oct 22 - Mon, Oct 27

5:47 pm - 11:35 pmEYW-SEA

8h 48m1 stop

10:49 pm - 1:52 pmSEA-EYW

12h 03m1 stop

$310American Airlines

Find Deal

Sat, Oct 11 - Sat, Oct 18

2:32 pm - 9:48 pmEYW-SEA

10h 16m1 stop

12:34 am - 2:46 pmSEA-EYW

11h 12m2 stops

$314American Airlines

Find Deal

Wed, Oct 22 - Mon, Oct 27

4:37 pm - 12:27 amEYW-SEA

10h 50m2 stops

12:34 am - 5:16 pmSEA-EYW

13h 42m2 stops

$319American Airlines

Find Deal

Wed, Oct 22 - Tue, Oct 28

6:17 pm - 11:54 pmEYW-SEA

8h 37m1 stop

9:55 pm - 11:27 amSEA-EYW

10h 32m1 stop

$339Delta

Find Deal

Tue, Oct 21 - Sun, Oct 26

6:17 pm - 11:54 pmEYW-SEA

8h 37m1 stop

1:30 pm - 11:27 amSEA-EYW

18h 57m2 stops

$357Delta

Find Deal

Tue, Oct 21 - Tue, Oct 28

6:17 pm - 2:44 pmEYW-SEA

23h 27m2 stops

9:55 pm - 11:27 amSEA-EYW

10h 32m1 stop

$371Delta

Find Deal

Tue, Oct 21 - Mon, Oct 27

2:30 pm - 10:04 pmEYW-SEA

10h 34m1 stop

12:30 am - 12:55 pmSEA-EYW

9h 25m2 stops

$379American Airlines

Find Deal

Thu, Sep 25 - Sun, Oct 5

3:12 pm - 11:56 amEYW-SEA

23h 44m3 stops

12:41 pm - 1:52 pmSEA-EYW

22h 11m2 stops

$673United Airlines

Find Deal

Wed, Oct 22 - Tue, Oct 28

3:12 pm - 11:56 amEYW-SEA

23h 44m3 stops

2:30 pm - 1:52 pmSEA-EYW

20h 22m2 stops

$746United Airlines

Find Deal

Wed, Oct 22 - Wed, Oct 29

American Airlines flights from Key West to Seattle

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

American Airlines

Oct 11

EYW5:47 pmKey West

8h 48m

1 stop

SEA11:35 pmSeattle/Tacoma Intl

Oct 18

SEA10:49 pmSeattle/Tacoma Intl

12h 03m

1 stop

EYW1:52 pmKey West

$310

Find similar

American Airlines

Oct 22

EYW2:32 pmKey West

10h 16m

1 stop

SEA9:48 pmSeattle/Tacoma Intl

Oct 27

SEA12:34 amSeattle/Tacoma Intl

11h 12m

2 stops

EYW2:46 pmKey West

$314

Find similar

American Airlines

Oct 22

EYW4:37 pmKey West

10h 50m

2 stops

SEA12:27 amSeattle/Tacoma Intl

Oct 28

SEA12:34 amSeattle/Tacoma Intl

13h 42m

2 stops

EYW5:16 pmKey West

$319

Find similar

Delta flights from Key West to Seattle

Our best Delta deals on Key West to Seattle flight tickets

Delta

Oct 22

EYW6:17 pmKey West

8h 37m

1 stop

SEA11:54 pmSeattle/Tacoma Intl

Oct 27

SEA9:55 pmSeattle/Tacoma Intl

10h 32m

1 stop

EYW11:27 amKey West

$309

Find similar

Delta

Oct 21

EYW6:17 pmKey West

8h 37m

1 stop

SEA11:54 pmSeattle/Tacoma Intl

Oct 26

SEA9:55 pmSeattle/Tacoma Intl

10h 32m

1 stop

EYW11:27 amKey West

$339

Find similar

Delta

Oct 21

EYW6:17 pmKey West

8h 37m

1 stop

SEA11:54 pmSeattle/Tacoma Intl

Oct 28

SEA1:30 pmSeattle/Tacoma Intl

18h 57m

2 stops

EYW11:27 amKey West

$357

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Wed 10/22

6:17 pm-11:54 pm

1 stop8h 37m

Seattle/Tacoma Intl

Mon 10/27

9:55 pm-11:27 am

1 stop10h 32m

$309

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Sat 10/11

5:47 pm-11:35 pm

1 stop8h 48m

Seattle/Tacoma Intl

Sat 10/18

10:49 pm-1:52 pm

1 stop12h 03m

$310

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Wed 10/22

2:32 pm-9:48 pm

1 stop10h 16m

Seattle/Tacoma Intl

Mon 10/27

12:34 am-2:46 pm

2 stops11h 12m

$314

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Wed 10/22

4:37 pm-12:27 am

2 stops10h 50m

Seattle/Tacoma Intl

Tue 10/28

12:34 am-5:16 pm

2 stops13h 42m

$319

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Tue 10/21

6:17 pm-11:54 pm

1 stop8h 37m

Seattle/Tacoma Intl

Sun 10/26

9:55 pm-11:27 am

1 stop10h 32m

$339

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Tue 10/21

6:17 pm-11:54 pm

1 stop8h 37m

Seattle/Tacoma Intl

Tue 10/28

1:30 pm-11:27 am

2 stops18h 57m

$357

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Tue 10/21

6:17 pm-2:44 pm

2 stops23h 27m

Seattle/Tacoma Intl

Mon 10/27

9:55 pm-11:27 am

1 stop10h 32m

$371

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Thu 9/25

2:30 pm-10:04 pm

1 stop10h 34m

Seattle/Tacoma Intl

Sun 10/5

12:30 am-12:55 pm

2 stops9h 25m

$379

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Wed 10/22

3:12 pm-11:56 am

3 stops23h 44m

Seattle/Tacoma Intl

Tue 10/28

12:41 pm-1:52 pm

2 stops22h 11m

$673

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Wed 10/22

3:12 pm-11:56 am

3 stops23h 44m

Seattle/Tacoma Intl

Wed 10/29

2:30 pm-1:52 pm

2 stops20h 22m

$746

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 day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Key West is on a Friday. momondo users have found tickets for Friday departures for as low as $503. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Tuesday is the most expensive day to depart from Key West because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $667.

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

Flying to Seattle from Key West at noon is the least expensive time of day to depart. momondo users have found prices as low as $623 when looking at flights departing at noon. Flights to Seattle are more costly in the morning, with an average ticket price of $648. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

How have Key West to Seattle flight prices changed over time?

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

Direct flights	None

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

Search flight deals

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 37m 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 2025.
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 7.2 10,000 reviews		Search American Airlines flights

Leavenworth

Tacoma

SeaTac

Ocean Shores

Olympia

Renton

Lynnwood

Kent

Marysville

Puyallup

Federal Way

Cle Elum

Tukwila

Kirkland

Centralia

Lakewood

Shoreline

Fife

Redmond

Westport

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.