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Key West

$151+ Cheap flights from Seattle to Key West (SEA - EYW)

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 12/30. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — EYW
Nov 26 — Dec 31
Wed 11/26
Wed 12/3
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Key West are usually found in September or October, booked 66 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Seattle to Key West

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Key West (EYW). 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 October 27, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$309
(American Airlines)

One-way from

$151
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$458
Provider with most accurate pricing for Seattle/Tacoma Intl-Key West flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Key West flights.
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From Seattle/Tacoma Intl to Key West
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One-way flight from Seattle/Tacoma Intl to Key West
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Highest demand for flights based on searches. 12% potential increase in price ($88 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($44 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Seattle to Key West

Cheapest flights from Seattle to Key West
Explore the most affordable flight options available from Seattle to Key West. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 27, 2025.

This American Airlines deal was found by Cheapflights users on 10/27. 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.
Wed 12/175:18 amSEA - EYW
1 stop7h 49mAmerican Airlines
Thu 12/252:28 pmEYW - SEA
1 stop9h 43mAmerican Airlines
Deal found 10/27$364
This American Airlines deal was found by Cheapflights users on 10/25. 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 12/410:34 amSEA - EYW
2 stops9h 33mAmerican Airlines
Wed 12/104:10 pmEYW - SEA
1 stop10h 06mAmerican Airlines
Deal found 10/25$369
This American Airlines deal was found by Cheapflights users on 10/27. 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.
Sat 12/1312:38 amSEA - EYW
1 stop9h 04mAmerican Airlines
Wed 12/244:03 pmEYW - SEA
1 stop10h 39mAmerican Airlines
Deal found 10/27$409
This Delta deal was found by Cheapflights users on 10/27. 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 12/147:25 amSEA - EYW
1 stop9h 41mDelta
Thu 12/257:25 amEYW - SEA
1 stop9h 42mDelta
Deal found 10/27$414
This Delta deal was found by Cheapflights users on 10/27. 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 12/1411:00 pmSEA - EYW
1 stop9h 43mDelta
Mon 12/227:25 amEYW - SEA
1 stop19h 33mDelta
Deal found 10/27$427
This American Airlines deal was found by Cheapflights users on 10/24. 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.
Wed 11/196:19 amSEA - EYW
1 stop8h 32mAmerican Airlines
Tue 11/254:10 pmEYW - SEA
1 stop10h 16mAmerican Airlines
Deal found 10/24$433
This American Airlines deal was found by Cheapflights users on 10/26. 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 11/2511:20 pmSEA - EYW
1 stop11h 39mAmerican Airlines
Tue 12/24:18 pmEYW - SEA
1 stop10h 08mAmerican Airlines
Deal found 10/26$437
This American Airlines deal was found by Cheapflights users on 10/24. 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 11/2011:20 pmSEA - EYW
1 stop11h 39mAmerican Airlines
Mon 11/244:55 pmEYW - SEA
1 stop9h 44mAmerican Airlines
Deal found 10/24$456

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Key West 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 October 27, 2025.
Use the filters below to find and compare flights from Seattle to Key West that are best for you.

Fly from

Seattle

Fly to

Key West

Route

Depart

Return

Price

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Sat 1/17

11:11 pm-10:57 am

1 stop8h 46m

Key West

Sat 1/31

3:15 pm-10:07 pm

1 stop9h 52m

$309

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Tue 1/13

7:00 am-6:01 pm

1 stop8h 01m

Key West

Wed 1/21

4:37 pm-11:42 pm

1 stop10h 05m

$309

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Mon 1/12

6:00 am-4:24 pm

1 stop7h 24m

Key West

Sat 1/17

4:37 pm-11:42 pm

1 stop10h 05m

$309

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Wed 12/17

5:18 am-4:07 pm

1 stop7h 49m

Key West

Thu 12/25

2:28 pm-9:11 pm

1 stop9h 43m

$364

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Mon 12/15

11:50 pm-1:51 pm

1 stop11h 01m

Key West

Wed 12/24

4:29 pm-12:34 am

1 stop11h 05m

$409

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Sun 12/14

11:50 pm-1:51 pm

1 stop11h 01m

Key West

Wed 12/24

4:29 pm-12:34 am

1 stop11h 05m

$409

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Tue 12/16

7:15 am-11:07 pm

2 stops12h 52m

Key West

Wed 12/24

4:03 pm-11:42 pm

1 stop10h 39m

$414

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Sun 12/14

6:00 am-5:15 pm

1 stop8h 15m

Key West

Thu 12/25

7:25 am-7:55 pm

2 stops15h 30m

$422

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Wed 12/17

7:25 am-8:06 pm

1 stop9h 41m

Key West

Thu 12/25

7:25 am-7:55 pm

2 stops15h 30m

$422

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Tue 12/16

7:25 am-8:06 pm

1 stop9h 41m

Key West

Thu 12/25

7:25 am-7:55 pm

2 stops15h 30m

$422

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 17 results
1
2

Compare providers for flights from Seattle to Key West

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 Seattle to Key West in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice 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 Seattle-Key West flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Key West flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Seattle-Key West flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Key West 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 Seattle-Key West 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 Seattle to Key West

Have a flexible travel schedule? Discover the best time to fly to Key West from Seattle 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 Seattle to Key West

How far ahead should I book a flight from Seattle to Key West?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Key West. Price data was last updated on October 24, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Key West, you should look to book at least 65 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, February is the cheapest month in which you can book a flight from Seattle to Key West (average of $284). Flying from Seattle to Key West in June is currently the most expensive (average of $555). 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.

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

Find hourly flight availability from Seattle to Key West. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 27, 2025.

One of the essential ways to save on airfare from Seattle to Key West is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight in the afternoon could potentially save you up to 34% on airfare.

Reviews of airlines servicing Key West

Get insights into the airlines that provide service to Key West. 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 Key West. Reviews last updated October 27, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and American Airlines from Seattle to Key West. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,996 reviews

Comfort

7.9

Overall

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.
Delta
7.9
Good
7,996 reviews
Delta
7.9
Good
7,996 reviews

Comfort

7.9

Overall

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.
United Airlines
7.4
Good
8,997 reviews
Delta
7.9
Good
7,996 reviews

Comfort

7.9

Overall

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.
American Airlines
7.2
Good
11,033 reviews
Delta
7.9
Good
7,996 reviews

Comfort

7.9

Overall

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Key West. 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 Seattle to Key West?

    For as low as $309, American Airlines can have you in Key West from Seattle in 8h 46m. Airlines will cover a distance of 2715 mi.

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

    Our cheapest airline available from Seattle to Key West is United Airlines. Our recent data shows that you can find tickets from as low as $278 on this airline. Additional options worth looking into are American Airlines and Delta, starting at $308 and $338 round-trip. United Airlines is 54% cheaper than the average price of flights available within the next 90 days to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Key West 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 Seattle to Key West?

    Currently, February is the cheapest month in which you can book a flight from Seattle to Key West (average of $284). Flying from Seattle to Key West in June is currently the most expensive (average of $555). 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.

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Top 3 airlines flying from Seattle to Key West

Discover the top 3 airlines that operate flights from Seattle to Key West. 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 October 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$278Average$587FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$308Average$566FlexibilityNo cancel feeOn-time71%
DeltaCheapest$338Average$703FlexibilityNo cancel feeOn-timeN/A

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