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

American Airlines, 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 September 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.

$280 Cheap Flights from Key West to Seattle in 2025/26

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Find the cheapest flights from Key West to Seattle

Round-trip

One-way

Cheap round-trip flights

6:05 pm - 8:55 amEYW-SEA

17h 50m2 stops

7:15 am - 8:03 pmSEA-EYW

9h 48m1 stop

$412Delta

Find Deal

Fri, Dec 5 - Tue, Dec 9

6:05 pm - 11:59 pmEYW-SEA

8h 54m1 stop

7:15 am - 8:03 pmSEA-EYW

9h 48m1 stop

$432Delta

Find Deal

Fri, Dec 5 - Tue, Dec 9

4:55 pm - 11:18 pmEYW-SEA

9h 23m1 stop

12:59 am - 12:47 pmSEA-EYW

8h 48m1 stop

$523American Airlines

Find Deal

Tue, Nov 25 - Sun, Nov 30

2:50 pm - 8:59 pmEYW-SEA

9h 09m1 stop

5:48 am - 7:23 pmSEA-EYW

10h 35m2 stops

$528American Airlines

Find Deal

Tue, Nov 25 - Mon, Dec 1

4:10 pm - 12:58 amEYW-SEA

11h 48m2 stops

10:35 am - 11:50 pmSEA-EYW

10h 15m2 stops

$533American Airlines

Find Deal

Tue, Nov 25 - Mon, Dec 1

2:39 pm - 9:13 pmEYW-SEA

9h 34m1 stop

12:28 am - 4:57 pmSEA-EYW

13h 29m2 stops

$537American Airlines

Find Deal

Fri, Dec 5 - Mon, Dec 8

12:00 pm - 6:55 pmEYW-SEA

9h 55m2 stops

8:30 am - 11:07 pmSEA-EYW

11h 37m2 stops

$542American Airlines

Find Deal

Fri, Dec 5 - Tue, Dec 9

1:33 pm - 11:26 pmEYW-SEA

12h 53m1 stop

5:24 am - 4:16 pmSEA-EYW

7h 52m1 stop

$616American Airlines

Find Deal

Sun, Nov 9 - Tue, Nov 11

6:10 pm - 11:54 pmEYW-SEA

8h 44m1 stop

9:45 pm - 10:55 amSEA-EYW

10h 10m1 stop

$817Delta

Find Deal

Sun, Sep 28 - Thu, Oct 2

4:00 pm - 12:18 pmEYW-SEA

23h 18m2 stops

12:41 pm - 3:09 pmSEA-EYW

23h 28m3 stops

$1,068United Airlines

Find Deal

Tue, Nov 25 - Mon, Dec 1

American Airlines flights from Key West to Seattle

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

American Airlines

Sep 23

EYW3:45 pmKey West

9h 44m

1 stop

SEA10:29 pmSeattle/Tacoma Intl

Sep 27

SEA11:05 pmSeattle/Tacoma Intl

11h 55m

1 stop

EYW2:00 pmKey West

$496

Find similar

American Airlines

Sep 23

EYW3:45 pmKey West

9h 44m

1 stop

SEA10:29 pmSeattle/Tacoma Intl

Sep 27

SEA11:05 pmSeattle/Tacoma Intl

11h 24m

2 stops

EYW1:29 pmKey West

$501

Find similar

American Airlines

Nov 25

EYW4:55 pmKey West

9h 23m

1 stop

SEA11:18 pmSeattle/Tacoma Intl

Nov 30

SEA12:59 amSeattle/Tacoma Intl

8h 48m

1 stop

EYW12:47 pmKey West

$523

Find similar

United Airlines flights from Key West to Seattle

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

United Airlines

Sep 23

EYW3:50 pmKey West

27h 02m

2 stops

SEA3:52 pmSeattle/Tacoma Intl

Sep 27

SEA1:12 pmSeattle/Tacoma Intl

22h 17m

3 stops

EYW2:29 pmKey West

$826

Find similar

United Airlines

Nov 25

EYW4:00 pmKey West

23h 18m

2 stops

SEA12:18 pmSeattle/Tacoma Intl

Dec 1

SEA12:41 pmSeattle/Tacoma Intl

23h 28m

3 stops

EYW3:09 pmKey West

$1,068

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Fri 12/5

6:05 pm-8:55 am

2 stops17h 50m

Seattle/Tacoma Intl

Tue 12/9

7:15 am-8:03 pm

1 stop9h 48m

$412

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Fri 12/5

6:05 pm-11:59 pm

1 stop8h 54m

Seattle/Tacoma Intl

Tue 12/9

7:15 am-8:03 pm

1 stop9h 48m

$432

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Tue 11/25

4:55 pm-11:18 pm

1 stop9h 23m

Seattle/Tacoma Intl

Sun 11/30

12:59 am-12:47 pm

1 stop8h 48m

$523

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Tue 11/25

2:50 pm-8:59 pm

1 stop9h 09m

Seattle/Tacoma Intl

Mon 12/1

5:48 am-7:23 pm

2 stops10h 35m

$528

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Tue 11/25

4:10 pm-12:58 am

2 stops11h 48m

Seattle/Tacoma Intl

Mon 12/1

10:35 am-11:50 pm

2 stops10h 15m

$533

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Fri 12/5

2:39 pm-9:13 pm

1 stop9h 34m

Seattle/Tacoma Intl

Mon 12/8

12:28 am-4:57 pm

2 stops13h 29m

$537

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Fri 12/5

12:00 pm-6:55 pm

2 stops9h 55m

Seattle/Tacoma Intl

Tue 12/9

8:30 am-11:07 pm

2 stops11h 37m

$542

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Sun 11/9

1:33 pm-11:26 pm

1 stop12h 53m

Seattle/Tacoma Intl

Tue 11/11

5:24 am-4:16 pm

1 stop7h 52m

$616

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Sun 9/28

6:10 pm-11:54 pm

1 stop8h 44m

Seattle/Tacoma Intl

Thu 10/2

9:45 pm-10:55 am

1 stop10h 10m

$817

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Tue 11/25

4:00 pm-12:18 pm

2 stops23h 18m

Seattle/Tacoma Intl

Mon 12/1

12:41 pm-3:09 pm

3 stops23h 28m

$1,068

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 44m 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 September 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

Renton

Olympia

Lynnwood

Kent

Marysville

Puyallup

Federal Way

Kirkland

Tukwila

Shoreline

Lakewood

Centralia

Fife

Cle Elum

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.