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Key West

$215+ 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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — EYW
Aug 24 — Aug 311
Mon 8/24
Mon 8/31
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 July 25, 2026.

This United Airlines deal was found by Cheapflights users on 7/23. 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.
Fri 12/410:40 pm
SEA
-
EYW
1 stop10h 11m
United Airlines
Tue 12/84:05 pm
EYW
-
SEA
1 stop11h 09m
United Airlines
Deal found 7/23$379
This United Airlines deal was found by Cheapflights users on 7/22. 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.
Fri 12/410:40 pm
SEA
-
EYW
1 stop10h 11m
United Airlines
Mon 12/74:05 pm
EYW
-
SEA
1 stop11h 09m
United Airlines
Deal found 7/22$404
This American Airlines deal was found by Cheapflights users on 7/21. 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 10/215:00 am
SEA
-
EYW
1 stop8h 54m
American Airlines
Tue 10/275:28 pm
EYW
-
SEA
1 stop9h 31m
American Airlines
Deal found 7/21$429
This American Airlines deal was found by Cheapflights users on 7/22. 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 9/68:21 pm
SEA
-
EYW
1 stop10h 23m
American Airlines
Tue 9/152:15 pm
EYW
-
SEA
1 stop8h 52m
American Airlines
Deal found 7/22$431
This American Airlines deal was found by Cheapflights users on 7/23. 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 8/228:47 pm
SEA
-
EYW
1 stop9h 57m
American Airlines
Sat 8/297:10 pm
EYW
-
SEA
1 stop8h 10m
American Airlines
Deal found 7/23$439
This Delta deal was found by Cheapflights users on 7/20. 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.
Fri 10/1610:35 pm
SEA
-
EYW
1 stop9h 13m
Delta
Sat 10/242:00 pm
EYW
-
SEA
1 stop11h 03m
Delta
Deal found 7/20$517
This American Airlines deal was found by Cheapflights users on 7/21. 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 8/255:10 am
SEA
-
EYW
1 stop8h 08m
American Airlines
Sat 8/297:10 pm
EYW
-
SEA
1 stop8h 10m
American Airlines
Deal found 7/21$518
This Delta deal was found by Cheapflights users on 7/23. 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 9/66:00 am
SEA
-
EYW
1 stop8h 20m
Delta
Sun 9/136:19 pm
EYW
-
SEA
1 stop8h 39m
Delta
Deal found 7/23$519
This Delta deal was found by Cheapflights users on 7/22. 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.
Fri 9/411:59 pm
SEA
-
EYW
1 stop7h 51m
Delta
Fri 9/116:19 pm
EYW
-
SEA
1 stop8h 39m
Delta
Deal found 7/22$532
This American Airlines deal was found by Cheapflights users on 7/20. 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 8/228:47 pm
SEA
-
EYW
1 stop9h 57m
American Airlines
Sun 8/304:45 pm
EYW
-
SEA
1 stop9h 04m
American Airlines
Deal found 7/20$540
This American Airlines deal was found by Cheapflights users on 7/22. 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 8/218:21 pm
SEA
-
EYW
1 stop10h 23m
American Airlines
Fri 8/281:50 pm
EYW
-
SEA
1 stop11h 09m
American Airlines
Deal found 7/22$545
This American Airlines deal was found by Cheapflights users on 7/21. 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 9/411:56 pm
SEA
-
EYW
1 stop13h 23m
American Airlines
Fri 9/112:15 pm
EYW
-
SEA
1 stop8h 52m
American Airlines
Deal found 7/21$549

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 July 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$379
(United Airlines)

One-way from

$215
(Kiwi.com)

Popular in

December

Cheapest in

July

Average price

$388
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. 12% potential increase in price ($81 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 25, 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

Fri 12/4

10:40 pm-11:51 am

1 stop10h 11m

Key West

Tue 12/8

4:05 pm-12:14 am

1 stop11h 09m

$379

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Sat 12/5

10:45 pm-1:02 pm

1 stop11h 17m

Key West

Tue 12/8

4:05 pm-10:29 pm

1 stop9h 24m

$379

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Sat 1/9

10:45 pm-1:02 pm

1 stop11h 17m

Key West

Wed 1/13

4:05 pm-10:29 pm

1 stop9h 24m

$479

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Sun 9/6

6:00 am-5:20 pm

1 stop8h 20m

Key West

Sun 9/13

6:19 pm-11:58 pm

1 stop8h 39m

$519
Quickest round-trip

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Fri 9/4

11:59 pm-10:50 am

1 stop7h 51m

Key West

Fri 9/11

6:19 pm-11:58 pm

1 stop8h 39m

$532

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Sun 9/6

8:21 pm-9:44 am

1 stop10h 23m

Key West

Tue 9/15

2:15 pm-12:11 am

2 stops12h 56m

$553
Cheapest one-way
Quickest one-way

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Tue 9/8

7:06 pm-9:24 am

2 stops11h 18m

$215

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

Tue 9/8

8:21 pm-1:17 pm

1 stop13h 56m

$381

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/25

Sorted by cheapest first

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 July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 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 $384). Flying from Seattle to Key West in December is currently the most expensive (average of $760). 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.

How much does it cost to fly round-trip from Seattle to Key West?

Airfare is below average for this route at the moment.

Seattle to Key West flights typically cost between $408 and $717 in December.
The cheapest round-trip price found within the last 5 days was $379 on United Airlines (Dec 4-Dec 8).

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 July 25, 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
7.8
Good
8,486 reviews

Food

7.2

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.8

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.8
Good
8,486 reviews
Delta
7.8
Good
8,486 reviews

Food

7.2

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.8

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
American Airlines
7.1
Good
11,847 reviews
Delta
7.8
Good
8,486 reviews

Food

7.2

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.8

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

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 $379, United Airlines can have you in Key West from Seattle in 10h 11m. 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 American Airlines. Our recent data shows that you can find tickets from as low as $314 on this airline. An additional option worth looking into is Delta, starting at $338. American Airlines is 44% 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 $384). Flying from Seattle to Key West in December is currently the most expensive (average of $760). 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 July 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$314Average$479FlexibilityNo cancel feeOn-time71%
DeltaCheapest$338Average$662FlexibilityNo cancel feeOn-timeN/A

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