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$214+ 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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
EYW — SEA
Apr 20 — Apr 271
Sun 4/20
Sun 4/27
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 April 15, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$492
(Delta)

One-way from

$214
(American Airlines)

Popular in

May

Cheapest in

December

Average price

$553
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. 16% potential increase in price ($109 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 15, 2025.

This Delta deal was found by Cheapflights users on 4/15. 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 6/126:29 pmEYW - SEA
1 stop8h 29mDelta
Tue 6/246:00 amSEA - EYW
1 stop10h 39mDelta
Deal found 4/15$492
This American Airlines deal was found by Cheapflights users on 4/15. 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 8/177:30 pmEYW - SEA
1 stop7h 58mAmerican Airlines
Mon 8/2512:24 amSEA - EYW
2 stops9h 37mAmerican Airlines
Deal found 4/15$497
This United Airlines deal was found by Cheapflights users on 4/15. 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.
Mon 5/196:45 pmEYW - SEA
2 stops22h 15mUnited Airlines
Tue 5/2711:50 pmSEA - EYW
2 stops15h 15mUnited Airlines
Deal found 4/15$557

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 April 15, 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

Thu 6/12

6:29 pm-11:58 pm

1 stop8h 29m

Seattle/Tacoma Intl

Tue 6/24

6:00 am-7:39 pm

1 stop10h 39m

$492

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Sun 8/17

7:30 pm-12:28 am

1 stop7h 58m

Seattle/Tacoma Intl

Mon 8/25

12:24 am-1:01 pm

2 stops9h 37m

$497

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Mon 5/19

6:45 pm-2:00 pm

2 stops22h 15m

Seattle/Tacoma Intl

Tue 5/27

11:50 pm-6:05 pm

2 stops15h 15m

$557

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Fri 7/4

3:02 pm-8:50 pm

1 stop8h 48m

$214

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Fri 6/27

6:45 pm-12:56 am

2 stops33h 11m

$261

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Thu 6/26

6:29 pm-11:58 pm

1 stop8h 29m

$279

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
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 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 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.

Cheapflights Insights

Everything you need to know about your flight from Key West to Seattle

What is the cheapest time of day to fly from EYW to SEA?

Find hourly flight availability from Key West to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 15, 2025.

A simple way to save on the total cost of your ticket is to fly from Key West to Seattle at noon. If you’re flexible enough to do this you can expect to save up to 4% on your trip compared to booking a flight in the morning.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 April 15, 2025.
Delta
8.0
Very good
7,917 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Delta
8.0
Very good
7,917 reviews
Delta
8.0
Very good
7,917 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
United Airlines
7.4
Good
8,658 reviews
Delta
8.0
Very good
7,917 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,917 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

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 are the cheapest airlines flying from Key West to Seattle round-trip?

    Our cheapest airline available from Key West to Seattle is Delta. Our recent data shows that you can find tickets from as low as $492 on this airline. Additional options worth looking into are American Airlines and United Airlines, starting at $497 and $557 round-trip. These flights start at 8% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Key West to Seattle one-way?

    $214 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $261 and $279, respectively.

  • 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 July is currently the most expensive (average of $411). 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 Key West?

Book flights to Key West if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Renton
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Olympia
Shoreline
Cle Elum
Centralia
Aberdeen
Kent
Lynnwood
Shelton
Silverdale
Redmond
Issaquah

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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 April 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$278Average$587FlexibilityNo cancel feeOn-time71%

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