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Key West

$183+ 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 5/17. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — EYW
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
1 adult, Economy
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Cheap 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 March 10, 2026.

This American Airlines deal was found by Cheapflights users on 3/8. 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.
Mon 8/1711:55 pm
SEA
-
EYW
1 stop9h 04m
American Airlines
Sat 8/221:22 pm
EYW
-
SEA
1 stop12h 36m
American Airlines
Deal found 3/8$349
This American Airlines deal was found by Cheapflights users on 3/5. 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.
Mon 10/261:17 am
SEA
-
EYW
2 stops12h 04m
American Airlines
Tue 11/34:26 pm
EYW
-
SEA
2 stops11h 32m
American Airlines
Deal found 3/5$379
This American Airlines deal was found by Cheapflights users on 3/7. 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 4/3011:33 pm
SEA
-
EYW
1 stop15h 43m
American Airlines
Tue 5/56:49 pm
EYW
-
SEA
1 stop18h 25m
American Airlines
Deal found 3/7$455
This American Airlines deal was found by Cheapflights users on 3/6. 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 3/185:30 am
SEA
-
EYW
2 stops10h 42m
American Airlines
Wed 3/2512:55 pm
EYW
-
SEA
1 stop11h 13m
American Airlines
Deal found 3/6$464
This American Airlines deal was found by Cheapflights users on 3/10. 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 4/286:00 am
SEA
-
EYW
1 stop8h 02m
American Airlines
Sat 5/23:58 pm
EYW
-
SEA
1 stop10h 46m
American Airlines
Deal found 3/10$468
This American Airlines deal was found by Cheapflights users on 3/7. 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.
Fri 9/410:35 pm
SEA
-
EYW
1 stop12h 07m
American Airlines
Fri 9/111:59 pm
EYW
-
SEA
2 stops11h 57m
American Airlines
Deal found 3/7$469
This United Airlines deal was found by Cheapflights users on 3/8. 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 4/2510:55 pm
SEA
-
EYW
1 stop11h 36m
United Airlines
Wed 4/293:52 pm
EYW
-
SEA
1 stop9h 50m
United Airlines
Deal found 3/8$479
This American Airlines deal was found by Cheapflights users on 3/8. 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.
Fri 4/1011:33 pm
SEA
-
EYW
1 stop15h 43m
American Airlines
Fri 4/176:46 pm
EYW
-
SEA
1 stop18h 28m
American Airlines
Deal found 3/8$485

Find 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 March 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$455
(American Airlines)

One-way from

$183
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$623
Provider with most accurate pricing for Seattle/Tacoma Intl-Key West flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Key West flights.
Search Deals
From Seattle/Tacoma Intl to Key West
Search Deals
One-way flight from Seattle/Tacoma Intl to Key West
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($131 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($44 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 March 10, 2026.
Use the filters below to find and compare flights from Seattle to Key West that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Sat 4/25

10:55 pm-1:31 pm

1 stop11h 36m

Key West

Wed 4/29

4:38 pm-11:12 pm

1 stop9h 34m

$479

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Mon 4/27

12:59 am-4:30 pm

2 stops12h 31m

Key West

Sat 5/2

6:46 pm-10:14 am

1 stop18h 28m

$491
Quickest round-trip

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Thu 8/20

10:35 pm-1:42 pm

1 stop12h 07m

Key West

Tue 8/25

3:00 pm-8:50 pm

1 stop8h 50m

$496

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Thu 4/30

11:33 pm-12:38 pm

1 stop10h 05m

Key West

Sat 5/2

2:29 pm-10:58 pm

2 stops11h 29m

$578
Cheapest one-way

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Fri 5/15

4:20 pm-11:44 am

3 stops40h 24m

$189

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Mon 5/18

6:57 pm-11:06 am

3 stops37h 09m

$189

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Sun 5/17

6:57 pm-11:30 am

2 stops13h 33m

$197

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Fri 6/12

9:14 pm-11:25 am

2 stops35h 11m

$248

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Fri 4/3

6:49 pm-2:52 pm

3 stops41h 03m

$250

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Wed 5/13

6:57 pm-12:31 pm

3 stops38h 34m

$288

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/7

Showing 1-10 of 13 resultsSorted by cheapest first
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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Key West flight deals on Cheapflights vs. FlightHub >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 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 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

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

Currently, September is the cheapest month in which you can book a flight from Seattle to Key West (average of $308). Flying from Seattle to Key West in June is currently the most expensive (average of $546). 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.

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 March 10, 2026.
Read reviews from past customers who have flown Delta 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
8,276 reviews

Entertainment

7.8

Boarding

8.1

Overall

7.9

Comfort

7.9

Crew

8.5

Food

7.2

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
8,276 reviews
Delta
7.9
Good
8,276 reviews

Entertainment

7.8

Boarding

8.1

Overall

7.9

Comfort

7.9

Crew

8.5

Food

7.2

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
7.1
Good
11,414 reviews
Delta
7.9
Good
8,276 reviews

Entertainment

7.8

Boarding

8.1

Overall

7.9

Comfort

7.9

Crew

8.5

Food

7.2

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 $479, United Airlines can have you in Key West from Seattle in 11h 36m. Airlines will cover a distance of 2715 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Our cheapest airline available from Seattle to Key West is American Airlines. Our recent data shows that you can find tickets from as low as $328 on this airline. An additional option worth looking into is Delta, starting at $338. American Airlines is 46% 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, September is the cheapest month in which you can book a flight from Seattle to Key West (average of $308). Flying from Seattle to Key West in June is currently the most expensive (average of $546). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Seattle to Key West

Discover the top 2 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 March 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$328Average$532FlexibilityNo cancel feeOn-time71%
DeltaCheapest$338Average$638FlexibilityNo cancel feeOn-timeN/A

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