$248+ Cheap flights from Seattle to Key West (SEA - EYW)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — EYW
Nov 24 — Dec 11
Round-trip
1 adult, Economy
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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.Cheap flight deals from Seattle to Key West
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Cheapest flights from Seattle to Key WestExplore 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 25, 2026.
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 25, 2026.
This United Airlines deal was found by Cheapflights users on 10/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1811:15 pm -
1 stop11h 37m
Wed 11/254:10 pm -
1 stop9h 57m
Deal found 10/21![United Airlines logo]()
$516
This United Airlines deal was found by Cheapflights users on 10/19. 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.
Sun 12/1311:33 pm -
1 stop12h 03m
Tue 12/224:04 pm -
1 stop9h 28m
Deal found 10/19![United Airlines logo]()
$520
This Delta deal was found by Cheapflights users on 10/20. 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 11/278:25 am -
1 stop8h 35m
Wed 12/27:25 am -
1 stop10h 11m
Deal found 10/20![Delta logo]()
$532
This Delta deal was found by Cheapflights users on 10/20. 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 11/278:25 am -
1 stop8h 35m
Thu 12/36:06 pm -
1 stop8h 49m
Deal found 10/20![Delta logo]()
$585
This deal was found by Cheapflights users on 10/22. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2111:44 pm -
1 stop8h 57m
Fri 12/2512:22 pm -
1 stop9h 44m
Deal found 10/22![United Airlines logo]()
$589
This United Airlines deal was found by Cheapflights users on 10/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2611:10 pm -
1 stop11h 42m
Thu 12/34:10 pm -
1 stop9h 33m
Deal found 10/20![United Airlines logo]()
$590
This American Airlines deal was found by Cheapflights users on 10/21. 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.
Sat 11/149:14 pm -
1 stop10h 30m
Sat 11/215:05 pm -
1 stop10h 37m
Deal found 10/21![American Airlines logo]()
$595
This American Airlines deal was found by Cheapflights users on 10/20. 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 11/219:14 pm -
1 stop9h 38m
Wed 11/254:53 pm -
1 stop9h 26m
Deal found 10/20![American Airlines logo]()
$596
This American Airlines deal was found by Cheapflights users on 10/21. 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 11/186:23 pm -
2 stops12h 29m
Wed 11/252:32 pm -
1 stop8h 36m
Deal found 10/21![American Airlines logo]()
$601
This deal was found by Cheapflights users on 10/22. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1911:44 pm -
1 stop8h 57m
Fri 12/254:04 pm -
1 stop9h 28m
Deal found 10/22![United Airlines logo]()
$619
This Delta deal was found by Cheapflights users on 10/20. 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.
Thu 11/2611:45 am -
1 stop20h 03m
Wed 12/27:25 am -
1 stop10h 11m
Deal found 10/20![Delta logo]()
$627
This American Airlines deal was found by Cheapflights users on 10/23. 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.
Fri 11/275:40 am -
1 stop10h 07m
Wed 12/210:14 am -
2 stops12h 47m
Deal found 10/23![American Airlines logo]()
$654
Best flights from Seattle to Key WestDiscover carefully curated flight deals from Seattle to Key West that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 25, 2026.
Discover carefully curated flight deals from Seattle to Key West that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 25, 2026.
This United Airlines deal was found by Cheapflights users on 10/19. 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.
Sun 12/1311:33 pm -
1 stop12h 03m
Tue 12/224:04 pm -
1 stop9h 28m
Deal found 10/19![United Airlines logo]()
$520
This Delta deal was found by Cheapflights users on 10/20. 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 11/278:25 am -
1 stop8h 35m
Wed 12/27:25 am -
1 stop10h 11m
Deal found 10/20![Delta logo]()
$532
This American Airlines deal was found by Cheapflights users on 10/23. 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.
Wed 12/29:14 pm -
1 stop9h 30m
Sat 12/55:01 pm -
1 stop10h 58m
Deal found 10/23![American Airlines logo]()
$654
This Delta deal was found by Cheapflights users on 10/20. 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 11/278:25 am -
1 stop8h 35m
Thu 12/36:06 pm -
1 stop8h 49m
Deal found 10/20![Delta logo]()
$585
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 1/1411:55 pm -
2 stops12h 14m
Wed 1/201:52 pm -
1 stop11h 35m
Deal found 10/24![American Airlines logo]()
$677
This Delta deal was found by Cheapflights users on 10/22. 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.
Sat 11/711:59 pm -
1 stop7h 48m
Tue 11/106:08 pm -
1 stop8h 49m
Deal found 10/22![Delta logo]()
$684
This American Airlines deal was found by Cheapflights users on 10/19. 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 1/511:59 pm -
2 stops10h 57m
Wed 1/1311:32 am -
2 stops12h 21m
Deal found 10/19![American Airlines logo]()
$723
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/142:30 pm -
3 stops20h 26m
Sat 11/214:10 pm -
1 stop9h 57m
Deal found 10/24![United Airlines logo]()
$932
This American Airlines deal was found by Cheapflights users on 10/20. 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.
Thu 12/249:23 pm -
1 stop9h 22m
Thu 12/312:45 pm -
1 stop8h 37m
Deal found 10/20![American Airlines logo]()
$803
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2011:44 pm -
1 stop8h 57m
Sun 12/274:04 pm -
2 stops20h 45m
Deal found 10/24![United Airlines logo]()
$981
Last-minute flights from Seattle to Key WestDiscover last-minute flight deals from Seattle to Key West. Data last updated October 25, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Key West. Data last updated October 25, 2026 and is based on user searches.
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/111:59 pm -
1 stop7h 48m
Sat 11/77:40 am -
1 stop9h 03m
Deal found 10/25![Delta logo]()
$664
This American Airlines deal was found by Cheapflights users on 10/21. 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.
Sat 11/149:14 pm -
1 stop10h 30m
Sat 11/215:05 pm -
1 stop10h 37m
Deal found 10/21![American Airlines logo]()
$595
This United Airlines deal was found by Cheapflights users on 10/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1811:15 pm -
1 stop11h 37m
Wed 11/254:10 pm -
1 stop9h 57m
Deal found 10/21![United Airlines logo]()
$516
This American Airlines deal was found by Cheapflights users on 10/21. 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 11/186:23 pm -
2 stops12h 29m
Wed 11/252:32 pm -
1 stop8h 36m
Deal found 10/21![American Airlines logo]()
$601
This American Airlines deal was found by Cheapflights users on 10/20. 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 11/219:14 pm -
1 stop9h 38m
Wed 11/254:53 pm -
1 stop9h 26m
Deal found 10/20![American Airlines logo]()
$596
This American Airlines deal was found by Cheapflights users on 10/20. 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.
Sun 11/2211:36 pm -
1 stop9h 10m
Tue 11/245:05 pm -
1 stop10h 37m
Deal found 10/20![American Airlines logo]()
$662
This United Airlines deal was found by Cheapflights users on 10/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2611:10 pm -
1 stop11h 42m
Thu 12/34:10 pm -
1 stop9h 33m
Deal found 10/20![United Airlines logo]()
$590
This Delta deal was found by Cheapflights users on 10/20. 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.
Thu 11/2611:45 am -
1 stop20h 03m
Wed 12/27:25 am -
1 stop10h 11m
Deal found 10/20![Delta logo]()
$627
This Delta deal was found by Cheapflights users on 10/20. 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 11/278:25 am -
1 stop8h 35m
Wed 12/27:25 am -
1 stop10h 11m
Deal found 10/20![Delta logo]()
$532
This Delta deal was found by Cheapflights users on 10/20. 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 11/278:25 am -
1 stop8h 35m
Thu 12/36:06 pm -
1 stop8h 49m
Deal found 10/20![Delta logo]()
$585
This American Airlines deal was found by Cheapflights users on 10/23. 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.
Fri 11/275:40 am -
1 stop10h 07m
Wed 12/210:14 am -
2 stops12h 47m
Deal found 10/23![American Airlines logo]()
$654
One-way flights from Seattle to Key WestSearch for one-way flight options from Seattle to Key West. Find affordable one-way fares based on user searches. Data last updated October 25, 2026.
Search for one-way flight options from Seattle to Key West. Find affordable one-way fares based on user searches. Data last updated October 25, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/94:58 pm -
3 stops40h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Multiple Airlines logo]()
$248
This Kiwi.com deal was found by Cheapflights users on 10/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/231:37 pm -
3 stops41h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![Multiple Airlines logo]()
$249
This American Airlines deal was found by Cheapflights users on 10/21. 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 12/96:00 am -
1 stop8h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![American Airlines logo]()
$313
This Delta deal was found by Cheapflights users on 10/20. 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.
Thu 12/249:55 pm -
1 stop9h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![Delta logo]()
$333
This Kiwi.com deal was found by Cheapflights users on 10/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/11:37 pm -
3 stops41h 41m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Multiple Airlines logo]()
$389
This Kiwi.com deal was found by Cheapflights users on 10/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/246:28 pm -
3 stops43h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![Multiple Airlines logo]()
$411
This American Airlines deal was found by Cheapflights users on 10/21. 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 11/255:10 am -
2 stops10h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![American Airlines logo]()
$468
This American Airlines deal was found by Cheapflights users on 10/20. 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.
Thu 12/2411:59 pm -
2 stops11h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![American Airlines logo]()
$545
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 October 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $479 (American Airlines) |
One-way from | $248 (Kiwi.com) |
Popular in | December |
Cheapest in | July |
Average price | $643 |
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 7,457,451 searches. Data last updated October 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
Cheapest round-trip
SeattleKey West
SEA Seattle/Tacoma Intl - EYW Key West
SEAEYW
Seattle/Tacoma Intl
Wed 12/9
4:58 pm-12:19 pm
3 stops40h 21m
Key West
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$248
SeattleKey West
SEA Seattle/Tacoma Intl - EYW Key West
SEAEYW
Seattle/Tacoma Intl
Wed 12/23
1:37 pm-10:19 am
3 stops41h 42m
Key West
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$249
Quickest round-trip
SeattleKey West
SEA Seattle/Tacoma Intl - EYW Key West
SEAEYW
Seattle/Tacoma Intl
Wed 12/23
11:44 pm-11:41 am
1 stop8h 57m
Key West
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$313
SeattleKey West
SEA Seattle/Tacoma Intl - EYW Key West
SEAEYW
Seattle/Tacoma Intl
Thu 12/24
9:55 pm-10:53 am
1 stop9h 58m
Key West
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$333
SeattleKey West
SEA Seattle/Tacoma Intl - EYW Key West
SEAEYW
Seattle/Tacoma Intl
Fri 1/1
10:50 pm-12:07 pm
1 stop10h 17m
Key West
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$333
SeattleKey West
SEA Seattle/Tacoma Intl - EYW Key West
SEAEYW
Seattle/Tacoma Intl
Fri 1/1
1:37 pm-10:18 am
3 stops41h 41m
Key West
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$389
SeattleKey West
SEA Seattle/Tacoma Intl - EYW Key West
SEAEYW
Seattle/Tacoma Intl
Wed 12/9
11:39 pm-4:16 pm
2 stops13h 37m
Key West
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$491
SeattleKey West
SEA Seattle/Tacoma Intl - EYW Key West
SEAEYW
Seattle/Tacoma Intl
Sun 12/13
11:33 pm-2:36 pm
1 stop12h 03m
Key West
Tue 12/22
4:04 pm-10:32 pm
1 stop9h 28m
$520
SeattleKey West
SEA Seattle/Tacoma Intl - EYW Key West
SEAEYW
Seattle/Tacoma Intl
Fri 11/27
8:25 am-8:00 pm
1 stop8h 35m
Key West
Wed 12/2
7:25 am-2:36 pm
1 stop10h 11m
$532
SeattleKey West
SEA Seattle/Tacoma Intl - EYW Key West
SEAEYW
Seattle/Tacoma Intl
Fri 11/27
8:25 am-8:00 pm
1 stop8h 35m
Key West
Thu 12/3
6:06 pm-11:55 pm
1 stop8h 49m
$585
Showing 1-10 of 20 resultsSorted 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 October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
SEA-EYW
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, July is the cheapest month in which you can book a flight from Seattle to Key West (average of $388). Flying from Seattle to Key West in December is currently the most expensive (average of $1,280). 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 $520 and $821 in January.The cheapest round-trip price found within the last 5 days was $479 on American Airlines (Jan 5-Jan 13).
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 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.
Boarding
8.1
Crew
8.5
Overall
7.8
Comfort
7.8
Entertainment
7.8
Food
7.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Crew
8.5
Overall
7.8
Comfort
7.8
Entertainment
7.8
Food
7.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Crew
8.5
Overall
7.8
Comfort
7.8
Entertainment
7.8
Food
7.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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Top 2 airlines flying from Seattle to Key West
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| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$384 | Average$550 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$458 | Average$678 | FlexibilityNo cancel fee | On-timeN/A |