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$190+ Cheap flights from Key West to Seattle (EYW - SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/8. Fares are subject to change and may not be available on all flights or dates of travel.
EYW — SEA
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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Cheap flight deals from Key West to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Key West (EYW) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 18, 2025.

Round-trip from

$502
(American Airlines)

One-way from

$190
(Kiwi.com)

Popular in

November

Cheapest in

December

Average price

$408
From Key West to Seattle/Tacoma Intl
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One-way flight from Key West to Seattle/Tacoma Intl
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High demand for flights, 3% potential price rise
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Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Key West to Seattle

Cheapest flights from Key West to Seattle
Explore the most affordable flight options available from Key West to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

This American Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/22:31 pmEYW - SEA
1 stop10h 05mAmerican Airlines
Sat 9/611:05 pmSEA - EYW
1 stop11h 55mAmerican Airlines
Deal found 8/18$502
This Delta deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/316:20 pmEYW - SEA
1 stop8h 39mDelta
Thu 9/47:50 amSEA - EYW
1 stop9h 22mDelta
Deal found 8/16$797
This American Airlines deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/311:29 pmEYW - SEA
1 stop13h 45mAmerican Airlines
Thu 9/45:26 amSEA - EYW
2 stops10h 33mAmerican Airlines
Deal found 8/16$811

Cheapflights Fare Finder

 
Customize your flight search to find flights from Key West to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 18, 2025.
Use the filters below to find and compare flights from Key West to Seattle that are best for you.

Fly from

Key West

Fly to

Seattle

Route

Depart

Return

Price

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Tue 9/2

2:31 pm-9:36 pm

1 stop10h 05m

Seattle/Tacoma Intl

Sat 9/6

11:05 pm-2:00 pm

1 stop11h 55m

$502

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Sun 8/31

6:20 pm-11:59 pm

1 stop8h 39m

Seattle/Tacoma Intl

Thu 9/4

7:50 am-8:12 pm

1 stop9h 22m

$797

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Sun 8/31

1:29 pm-12:14 am

1 stop13h 45m

Seattle/Tacoma Intl

Thu 9/4

5:26 am-6:59 pm

2 stops10h 33m

$811

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Sat 11/8

9:51 am-12:13 pm

3 stops29h 22m

$190

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Sat 12/13

5:46 pm-4:51 pm

3 stops50h 05m

$265

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Sat 11/8

7:40 am-2:01 pm

1 stop9h 21m

$279

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Thu 11/13

4:00 pm-10:45 pm

1 stop9h 45m

$279

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Sat 12/13

3:02 pm-11:18 pm

1 stop11h 16m

$279

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Thu 11/13

1:45 pm-8:59 pm

2 stops10h 14m

$284

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Sat 11/8

2:36 pm-11:18 pm

2 stops11h 42m

$284

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Best time to book a flight from Key West to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Key West with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated August 18, 2025.
See what other customers who have flown with American Airlines from Key West to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
10,000 reviews

Food

6.5

Crew

8.0

Entertainment

6.9

Boarding

7.5

Overall

7.2

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

MIA - DCA

Flight delayed 5 hours and was told it was due to mechanical issues. Instead of providing lodging due to missed connecting flight, American changed the cause of delay to weather, which meant they were not able required to provide a hotel. To make matters worse, one of our checked bags was lost even though its status said it was “by the plane” but no one at the service desk seemed able to locate it.
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Food

6.5

Crew

8.0

Entertainment

6.9

Boarding

7.5

Overall

7.2

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

MIA - DCA

Flight delayed 5 hours and was told it was due to mechanical issues. Instead of providing lodging due to missed connecting flight, American changed the cause of delay to weather, which meant they were not able required to provide a hotel. To make matters worse, one of our checked bags was lost even though its status said it was “by the plane” but no one at the service desk seemed able to locate it.

Related info for your journey

Find useful and relevant information for your journey from Key West to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What is the cheapest airline to fly from Key West to Seattle round-trip?

    Our cheapest airline available from Key West to Seattle is American Airlines. Our recent data shows that you can find tickets from as low as $308 on this airline. This flight start at 37% lower than the current average price 3 months from now.

  • Can I find deals for flights from Key West to Seattle that include hotel bookings?

    Yes. In addition to deals on Key West to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Key West to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Key West to Seattle.

  • Can I find deals for business class flights from Key West to Seattle?

    Yes. Cheapflights offers flight deals from Key West to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Key West to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Key West to Seattle (average of $238). Flying from Key West to Seattle in June is currently the most expensive (average of $389). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Ocean Shores
Lakewood
Lynnwood
Lacey
Leavenworth
Renton
Olympia
Puyallup
Kent
Cle Elum
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline
Federal Way
Shelton

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Top airline flying from Key West to Seattle

Discover the top airline that operate flights from Key West to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$308Average$556FlexibilityNo cancel feeOn-time71%

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