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

American Airlines is the most popular carrier 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 December 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.

$297 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

Enter your travel dates to find the best prices.

4:15 pm - 10:43 pm

EYW

SEA

9h 28m1 stop

11:45 pm - 1:03 pm

SEA

EYW

10h 18m1 stop

$409United Airlines

Fri, Jan 23 - Sun, Jan 25

4:15 pm - 6:26 pm

EYW

SEA

29h 11m2 stops

11:45 pm - 1:03 pm

SEA

EYW

10h 18m1 stop

$474United Airlines

Fri, Jan 23 - Sun, Jan 25

4:15 pm - 6:26 pm

EYW

SEA

29h 11m2 stops

11:45 pm - 1:03 pm

SEA

EYW

10h 18m1 stop

$484United Airlines

Fri, Jan 23 - Sun, Jan 25

4:03 pm - 11:42 pm

EYW

SEA

10h 39m1 stop

10:13 pm - 10:57 am

SEA

EYW

9h 44m2 stops

$498American Airlines

Wed, Dec 24 - Mon, Jan 5

4:15 pm - 10:43 pm

EYW

SEA

9h 28m1 stop

12:57 pm - 4:22 pm

SEA

EYW

24h 25m3 stops

$507United Airlines

Fri, Jan 23 - Sun, Jan 25

4:15 pm - 9:15 pm

EYW

SEA

32h 00m2 stops

12:57 pm - 4:22 pm

SEA

EYW

24h 25m3 stops

$573United Airlines

Fri, Jan 23 - Sun, Jan 25

4:15 pm - 9:55 am

EYW

SEA

20h 40m2 stops

12:57 pm - 4:22 pm

SEA

EYW

24h 25m3 stops

$583United Airlines

Fri, Jan 23 - Sun, Jan 25

4:29 pm - 9:07 pm

EYW

SEA

31h 38m3 stops

11:09 pm - 1:03 pm

SEA

EYW

10h 54m1 stop

$627United Airlines

Wed, Dec 24 - Mon, Jan 5

4:10 pm - 10:47 pm

EYW

SEA

9h 37m1 stop

7:00 am - 3:12 pm

SEA

EYW

29h 12m1 stop

$687United Airlines

Mon, Dec 22 - Mon, Dec 29

4:10 pm - 10:47 pm

EYW

SEA

9h 37m1 stop

3:50 pm - 4:29 pm

SEA

EYW

21h 39m2 stops

$737United Airlines

Mon, Dec 22 - Mon, Dec 29

United Airlines flights from Key West to Seattle

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

United Airlines

Jan 23

EYW4:15 pmKey West

9h 28m

1 stop

SEA10:43 pmSeattle/Tacoma Intl

Jan 25

SEA11:45 pmSeattle/Tacoma Intl

10h 18m

1 stop

EYW1:03 pmKey West

$409

Find similar

United Airlines

Jan 23

EYW4:15 pmKey West

29h 11m

2 stops

SEA6:26 pmSeattle/Tacoma Intl

Jan 25

SEA11:45 pmSeattle/Tacoma Intl

10h 18m

1 stop

EYW1:03 pmKey West

$474

Find similar

United Airlines

Jan 23

EYW4:15 pmKey West

29h 11m

2 stops

SEA6:26 pmSeattle/Tacoma Intl

Jan 25

SEA11:45 pmSeattle/Tacoma Intl

10h 18m

1 stop

EYW1:03 pmKey West

$484

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Fri 1/23

4:15 pm-10:43 pm

1 stop9h 28m

Seattle/Tacoma Intl

Sun 1/25

11:45 pm-1:03 pm

1 stop10h 18m

$409

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Fri 1/23

4:15 pm-6:26 pm

2 stops29h 11m

Seattle/Tacoma Intl

Sun 1/25

11:45 pm-1:03 pm

1 stop10h 18m

$474

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Fri 1/23

4:15 pm-6:26 pm

2 stops29h 11m

Seattle/Tacoma Intl

Sun 1/25

11:45 pm-1:03 pm

1 stop10h 18m

$484

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Wed 12/24

4:03 pm-11:42 pm

1 stop10h 39m

Seattle/Tacoma Intl

Mon 1/5

10:13 pm-10:57 am

2 stops9h 44m

$498

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Fri 1/23

4:15 pm-10:43 pm

1 stop9h 28m

Seattle/Tacoma Intl

Sun 1/25

12:57 pm-4:22 pm

3 stops24h 25m

$507

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Fri 1/23

4:15 pm-9:15 pm

2 stops32h 00m

Seattle/Tacoma Intl

Sun 1/25

12:57 pm-4:22 pm

3 stops24h 25m

$573

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Fri 1/23

4:15 pm-9:55 am

2 stops20h 40m

Seattle/Tacoma Intl

Sun 1/25

12:57 pm-4:22 pm

3 stops24h 25m

$583

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Wed 12/24

4:29 pm-9:07 pm

3 stops31h 38m

Seattle/Tacoma Intl

Mon 1/5

11:09 pm-1:03 pm

1 stop10h 54m

$627

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Mon 12/22

4:10 pm-10:47 pm

1 stop9h 37m

Seattle/Tacoma Intl

Mon 12/29

7:00 am-3:12 pm

1 stop29h 12m

$687

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Mon 12/22

4:10 pm-10:47 pm

1 stop9h 37m

Seattle/Tacoma Intl

Mon 12/29

3:50 pm-4:29 pm

2 stops21h 39m

$737

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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.

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	9h 23m
Direct flights	None

The fastest flight from Key West to Seattle takes 9h 23m

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. 9h 24m 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 December 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 11,042 reviews		Search American Airlines flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Puyallup

Marysville

Redmond

Tukwila

Cle Elum

Federal Way

Lakewood

Fife

Westport

Kirkland

Centralia

Shoreline

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.