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$183+ 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
EYW — SEA
Sep 14 — Sep 211
Mon 9/14
Mon 9/21
1 adult, Economy
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Cheap 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 15, 2026.

This United Airlines deal was found by Cheapflights users on 8/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/264:00 pm -
1 stop9h 56m
Tue 9/2910:48 pm -
1 stop11h 41m
Deal found 8/11$489
This Delta deal was found by Cheapflights users on 8/10. 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.
Tue 8/257:40 am -
1 stop10h 05m
Sat 8/2911:59 pm -
1 stop7h 51m
Deal found 8/10$555
This United Airlines deal was found by Cheapflights users on 8/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/244:00 pm -
1 stop9h 56m
Tue 10/275:05 am -
2 stops31h 24m
Deal found 8/13$594
This American Airlines deal was found by Cheapflights users on 8/10. 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 8/251:40 pm -
2 stops12h 41m
Sat 8/298:47 pm -
1 stop9h 57m
Deal found 8/10$619
This Delta deal was found by Cheapflights users on 8/13. 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.
Fri 8/287:40 am -
1 stop10h 05m
Tue 9/111:59 pm -
1 stop7h 51m
Deal found 8/13$624

Find 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 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$489
(United Airlines)

One-way from

$183
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$638
Provider with most accurate pricing for Key West-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Key West-Seattle/Tacoma Intl flights.
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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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Highest demand for flights based on searches. 26% potential increase in price ($194 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in August 2026
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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 15, 2026.
Use the filters below to find and compare flights from Key West to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Key WestSeattle

EYW Key West - SEA Seattle/Tacoma Intl

EYWSEA

Key West

Sat 10/24

4:00 pm-10:56 pm

1 stop9h 56m

Seattle/Tacoma Intl

Tue 10/27

11:15 pm-1:52 pm

1 stop11h 37m

$489

Key WestSeattle

EYW Key West - SEA Seattle/Tacoma Intl

EYWSEA

Key West

Sat 9/26

4:00 pm-10:56 pm

1 stop9h 56m

Seattle/Tacoma Intl

Tue 9/29

10:48 pm-1:29 pm

1 stop11h 41m

$489
Quickest round-trip

Key WestSeattle

EYW Key West - SEA Seattle/Tacoma Intl

EYWSEA

Key West

Tue 8/25

7:40 am-2:45 pm

1 stop10h 05m

Seattle/Tacoma Intl

Sat 8/29

11:59 pm-10:50 am

1 stop7h 51m

$555

Key WestSeattle

EYW Key West - SEA Seattle/Tacoma Intl

EYWSEA

Key West

Tue 8/25

1:40 pm-11:21 pm

2 stops12h 41m

Seattle/Tacoma Intl

Sat 8/29

8:47 pm-9:44 am

1 stop9h 57m

$619

Key WestSeattle

EYW Key West - SEA Seattle/Tacoma Intl

EYWSEA

Key West

Fri 8/28

7:40 am-2:45 pm

1 stop10h 05m

Seattle/Tacoma Intl

Tue 9/1

11:59 pm-10:50 am

1 stop7h 51m

$624
Cheapest one-way

Key WestSeattle

EYW Key West - SEA Seattle/Tacoma Intl

EYWSEA

Key West

Thu 9/10

10:59 am-6:28 pm

3 stops34h 29m

$183

Key WestSeattle

EYW Key West - SEA Seattle/Tacoma Intl

EYWSEA

Key West

Wed 1/27

7:00 am-2:50 pm

1 stop10h 50m

$293

Key WestSeattle

EYW Key West - SEA Seattle/Tacoma Intl

EYWSEA

Key West

Wed 1/27

4:24 pm-11:42 pm

1 stop10h 18m

$293
Quickest one-way

Key WestSeattle

EYW Key West - SEA Seattle/Tacoma Intl

EYWSEA

Key West

Thu 9/10

2:00 pm-9:15 pm

1 stop10h 15m

$313

Key WestSeattle

EYW Key West - SEA Seattle/Tacoma Intl

EYWSEA

Key West

Sun 1/24

2:25 pm-10:37 pm

1 stop11h 12m

$313

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/11

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

Compare providers for flights from Key West to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Key West to Seattle in August.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Key West-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Key West-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Key West-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Key West-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Key West-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 15, 2026.
See what other customers who have flown with Delta and 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.
Delta
7.8
Good
8,508 reviews

Comfort

7.8

Food

7.2

Overall

7.8

Boarding

8.1

Entertainment

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Lesley,Aug 2023

LIH - SEA

It was a red eye flight . And after take off and the first service the flight attendants were no where to be found except in the galley. When I went to the bathroom, the entrance was blocked by a FA sitting and he basically exhaled loudly as he had to move his legs so I could get in. Never mind I was a comfort plus passenger and traveled to the back of the plane to go to the bathroom. I know I can go up to first class because there are no rules to prohibit me but it followed the “air” rules and was the flight attendants were rude as if I was putting them out. I will always fly delta but get your crew in check. I’m a former flight attendant and the crew is not priviledged. They are hired and paid to do a service.
Delta
7.8
Good
8,508 reviews
Delta
7.8
Good
8,508 reviews

Comfort

7.8

Food

7.2

Overall

7.8

Boarding

8.1

Entertainment

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Lesley,Aug 2023

LIH - SEA

It was a red eye flight . And after take off and the first service the flight attendants were no where to be found except in the galley. When I went to the bathroom, the entrance was blocked by a FA sitting and he basically exhaled loudly as he had to move his legs so I could get in. Never mind I was a comfort plus passenger and traveled to the back of the plane to go to the bathroom. I know I can go up to first class because there are no rules to prohibit me but it followed the “air” rules and was the flight attendants were rude as if I was putting them out. I will always fly delta but get your crew in check. I’m a former flight attendant and the crew is not priviledged. They are hired and paid to do a service.
American Airlines
7.1
Good
11,941 reviews
Delta
7.8
Good
8,508 reviews

Comfort

7.8

Food

7.2

Overall

7.8

Boarding

8.1

Entertainment

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Lesley,Aug 2023

LIH - SEA

It was a red eye flight . And after take off and the first service the flight attendants were no where to be found except in the galley. When I went to the bathroom, the entrance was blocked by a FA sitting and he basically exhaled loudly as he had to move his legs so I could get in. Never mind I was a comfort plus passenger and traveled to the back of the plane to go to the bathroom. I know I can go up to first class because there are no rules to prohibit me but it followed the “air” rules and was the flight attendants were rude as if I was putting them out. I will always fly delta but get your crew in check. I’m a former flight attendant and the crew is not priviledged. They are hired and paid to do a service.

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.

  • How long is the flight from Key West to Seattle?

    For as low as $489, United Airlines can have you in Seattle from Key West in 9h 56m. Key West and Seattle are separated by a distance of 2715 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying 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. An additional option worth looking into is Delta, starting at $428. These flights start at 42% 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.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Renton
Tacoma
Lacey
Leavenworth
Olympia
Tukwila
Edmonds
Snoqualmie
Lynnwood
Tumwater
Centralia
Puyallup
Marysville
Kent
Ellensburg
Fife
Ocean Shores
Lakewood
Poulsbo

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Top 2 airlines flying from Key West to Seattle

Discover the top 2 airlines 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 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$308Average$438FlexibilityNo cancel feeOn-time71%
DeltaCheapest$428Average$593FlexibilityNo cancel feeOn-timeN/A

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