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$163+ 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 12/13. Fares are subject to change and may not be available on all flights or dates of travel.
EYW — SEA
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
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 November 13, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$334
(Delta)

One-way from

$179
(Kiwi.com)

Popular in

June

Cheapest in

December

Average price

$576
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. 19% potential increase in price ($124 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 13, 2025.

This Delta deal was found by Cheapflights users on 11/13. 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.
Thu 11/2012:26 pmEYW - SEA
1 stop11h 24mDelta
Mon 11/246:00 amSEA - EYW
1 stop8h 23mDelta
Deal found 11/13$439
This American Airlines deal was found by Cheapflights users on 11/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/202:39 pmEYW - SEA
1 stop11h 26mAmerican Airlines
Sun 11/2312:59 amSEA - EYW
1 stop8h 48mAmerican Airlines
Deal found 11/13$489
This Delta deal was found by Cheapflights users on 11/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/256:18 pmEYW - SEA
1 stop8h 41mDelta
Mon 12/17:15 amSEA - EYW
1 stop9h 38mDelta
Deal found 11/11$504
This American Airlines deal was found by Cheapflights users on 11/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/254:10 pmEYW - SEA
1 stop10h 16mAmerican Airlines
Sun 11/3012:59 amSEA - EYW
1 stop8h 48mAmerican Airlines
Deal found 11/11$506

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 November 13, 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

Wed 4/29

2:35 pm-10:05 pm

1 stop10h 30m

Seattle/Tacoma Intl

Sun 5/3

9:20 pm-10:58 am

1 stop10h 38m

$334

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Tue 11/25

6:18 pm-11:59 pm

1 stop8h 41m

Seattle/Tacoma Intl

Mon 12/1

7:15 am-7:53 pm

1 stop9h 38m

$504

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

10:35 am-11:50 pm

2 stops10h 15m

$511

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Wed 4/29

3:06 pm-8:46 pm

1 stop8h 40m

Seattle/Tacoma Intl

Sat 5/2

1:33 am-4:21 pm

2 stops11h 48m

$549

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Sat 12/13

10:47 am-11:53 am

2 stops52h 06m

$163

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Wed 2/4

10:49 am-11:19 am

2 stops27h 30m

$163

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Wed 2/4

2:25 pm-11:15 pm

1 stop11h 50m

$269

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Wed 2/4

12:00 pm-8:45 pm

2 stops11h 45m

$274

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Sat 12/13

6:10 pm-11:58 pm

1 stop8h 48m

$289

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/13

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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Key West-Seattle flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 November 13, 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
11,050 reviews

Crew

8.0

Comfort

7.2

Entertainment

6.9

Food

6.4

Overall

7.2

Boarding

7.5

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
11,050 reviews
American Airlines
7.2
Good
11,050 reviews

Crew

8.0

Comfort

7.2

Entertainment

6.9

Food

6.4

Overall

7.2

Boarding

7.5

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.

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

    For as low as $334, Delta can have you in Seattle from Key West in 10h 30m. Key West and Seattle are separated by a distance of 2715 mi.

  • 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 38% 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
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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 November 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$308Average$520FlexibilityNo cancel feeOn-time71%

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