HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Key West

$193+ 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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — EYW
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Key West with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Key West are usually found in January or March, 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 August 18, 2025.

Round-trip from

$309
(American Airlines)

One-way from

$193
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$556
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. 11% potential increase in price ($80 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

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 August 18, 2025.

This American Airlines deal was found by Cheapflights users on 8/16. 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 9/911:05 pmSEA - EYW
1 stop11h 55mAmerican Airlines
Tue 9/163:45 pmEYW - SEA
1 stop9h 44mAmerican Airlines
Deal found 8/16$309
This American Airlines deal was found by Cheapflights users on 8/18. 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 9/911:05 pmSEA - EYW
2 stops11h 24mAmerican Airlines
Wed 9/173:45 pmEYW - SEA
1 stop9h 44mAmerican Airlines
Deal found 8/18$314
This American Airlines deal was found by Cheapflights users on 8/16. 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 9/1611:38 pmSEA - EYW
1 stop8h 35mAmerican Airlines
Tue 9/233:45 pmEYW - SEA
1 stop9h 44mAmerican Airlines
Deal found 8/16$349
This American Airlines deal was found by Cheapflights users on 8/17. 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 10/15:26 amSEA - EYW
2 stops10h 33mAmerican Airlines
Tue 10/75:47 pmEYW - SEA
1 stop8h 48mAmerican Airlines
Deal found 8/17$354
This American Airlines deal was found by Cheapflights users on 8/17. 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 11/65:24 amSEA - EYW
2 stops11h 05mAmerican Airlines
Wed 11/124:26 pmEYW - SEA
1 stop10h 14mAmerican Airlines
Deal found 8/17$379
This American Airlines deal was found by Cheapflights users on 8/16. 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 9/83:23 pmSEA - EYW
2 stops16h 31mAmerican Airlines
Wed 9/172:30 pmEYW - SEA
1 stop10h 34mAmerican Airlines
Deal found 8/16$414
This Delta deal was found by Cheapflights users on 8/16. 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.
Mon 9/159:45 pmSEA - EYW
1 stop10h 10mDelta
Tue 9/236:10 pmEYW - SEA
1 stop8h 44mDelta
Deal found 8/16$424

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 August 18, 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

Tue 1/13

7:46 am-6:35 pm

1 stop7h 49m

Key West

Wed 1/21

8:10 am-5:24 pm

1 stop12h 14m

$309

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Wed 9/10

7:20 am-8:12 pm

1 stop9h 52m

Key West

Tue 9/16

6:10 pm-11:54 pm

1 stop8h 44m

$309

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Sat 10/4

11:38 pm-12:05 pm

1 stop9h 27m

Key West

Wed 10/8

2:09 pm-8:10 pm

1 stop9h 01m

$309

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Fri 1/30

7:46 am-6:35 pm

1 stop7h 49m

Key West

Tue 2/3

8:10 am-5:24 pm

1 stop12h 14m

$309

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Tue 9/9

11:05 pm-2:00 pm

1 stop11h 55m

Key West

Tue 9/16

3:45 pm-10:29 pm

1 stop9h 44m

$309

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Tue 9/9

11:38 pm-11:13 am

1 stop8h 35m

Key West

Wed 9/17

12:00 pm-6:13 pm

1 stop9h 13m

$309

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Mon 9/22

6:12 am-9:12 am

3 stops48h 00m

$193

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Tue 9/23

7:00 am-9:12 am

2 stops23h 12m

$250

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Tue 9/23

6:42 am-5:46 pm

1 stop8h 04m

$259

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Mon 9/22

11:10 pm-2:01 pm

1 stop11h 51m

$279

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

Showing 1-10 of 13 results
1
2

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 August 8, 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, August is the cheapest month in which you can book a flight from Seattle to Key West (average of $328). Flying from Seattle to Key West in March is currently the most expensive (average of $492). 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 August 18, 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 at noon tend to be the most expensive. A flight in the morning could potentially save you up to 11% 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 August 18, 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
8.0
Very good
7,981 reviews

Food

7.3

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Food

7.3

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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
8,925 reviews
Delta
8.0
Very good
7,981 reviews

Food

7.3

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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
10,000 reviews
Delta
8.0
Very good
7,981 reviews

Food

7.3

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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 7h 49m. 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 United Airlines. Our recent data shows that you can find tickets from as low as $308 on this airline. Additional options worth looking into are American Airlines and Delta, starting at $318 and $373 round-trip. United Airlines is 52% 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, August is the cheapest month in which you can book a flight from Seattle to Key West (average of $328). Flying from Seattle to Key West in March is currently the most expensive (average of $492). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Key West

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Orlando flights
Seattle to Miami flights
Seattle to Tampa flights
Portland to Orlando flights
Seattle to Fort Lauderdale flights
Portland to Miami flights
Seattle to Pensacola flights
Seattle to Jacksonville flights
Spokane to Orlando flights
Seattle to Valparaiso flights
Portland to Tampa flights
Portland to Fort Lauderdale flights
Seattle to Fort Myers flights
Seattle to Sarasota flights
Portland to Jacksonville flights
Portland to Pensacola flights
Spokane to Melbourne flights
Seattle to Daytona Beach flights
Seattle to Panama City flights
Spokane to Daytona Beach flights
Portland to Sarasota flights
Portland to Gainesville flights
Spokane to Miami flights
Seattle to West Palm Beach flights
Portland to Fort Myers flights
Spokane to Tampa flights
Seattle to Gainesville flights
Pasco to Tampa flights
Pasco to Miami flights
Portland to Panama City flights
Pasco to Orlando flights
Portland to Daytona Beach flights
Portland to Key West flights
Portland to West Palm Beach flights
Spokane to Fort Lauderdale flights
Spokane to Jacksonville flights
Portland to Tallahassee flights
Seattle to Melbourne flights
Pasco to Fort Lauderdale flights
Portland to Melbourne flights
Spokane to Fort Myers flights
Portland to Valparaiso flights
Pasco to Fort Myers flights
Spokane to Valparaiso flights
Bellingham to Orlando flights
Yakima to Orlando flights
Pasco to Melbourne flights
Spokane to Pensacola flights
Spokane to Panama City flights

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 August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$308Average$507FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$318Average$614FlexibilityNo cancel feeOn-time71%
DeltaCheapest$373Average$745FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.