$239+ 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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — EYW
Oct 8 — Oct 151
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
Cheapest
Best
Last-minute
One-way
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 September 8, 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 September 8, 2026.
This United Airlines deal was found by Cheapflights users on 9/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2410:48 pm -
1 stop12h 06m
Fri 10/304:10 pm -
1 stop10h 49m
Deal found 9/5![United Airlines logo]()
$399
This American Airlines deal was found by Cheapflights users on 9/6. 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 10/216:00 am -
1 stop9h 49m
Wed 10/285:28 pm -
1 stop9h 31m
Deal found 9/6![American Airlines logo]()
$438
This American Airlines deal was found by Cheapflights users on 9/3. 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 10/168:39 pm -
1 stop10h 15m
Sat 10/244:45 pm -
1 stop9h 25m
Deal found 9/3![American Airlines logo]()
$492
This American Airlines deal was found by Cheapflights users on 9/6. 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.
Sat 10/246:00 am -
1 stop9h 49m
Fri 10/302:34 pm -
1 stop10h 23m
Deal found 9/6![American Airlines logo]()
$493
This American Airlines deal was found by Cheapflights users on 9/6. 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 11/255:40 am -
1 stop10h 07m
Tue 12/14:43 pm -
1 stop9h 50m
Deal found 9/6![American Airlines logo]()
$497
This United Airlines deal was found by Cheapflights users on 9/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1711:44 pm -
1 stop8h 57m
Fri 12/254:04 pm -
1 stop9h 28m
Deal found 9/6![United Airlines logo]()
$509
This American Airlines deal was found by Cheapflights users on 9/7. 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 12/311:34 pm -
1 stop13h 58m
Mon 12/75:05 pm -
1 stop19h 34m
Deal found 9/7![American Airlines logo]()
$525
This American Airlines deal was found by Cheapflights users on 9/6. 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.
Sat 11/75:10 am -
1 stop8h 45m
Sat 11/142:26 pm -
1 stop8h 31m
Deal found 9/6![American Airlines logo]()
$528
This American Airlines deal was found by Cheapflights users on 9/4. 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 10/308:39 pm -
1 stop10h 15m
Sun 11/12:26 pm -
1 stop10h 45m
Deal found 9/4![American Airlines logo]()
$545
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 September 8, 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 September 8, 2026.
This American Airlines deal was found by Cheapflights users on 9/6. 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 11/255:40 am -
1 stop10h 07m
Tue 12/14:43 pm -
1 stop9h 50m
Deal found 9/6![American Airlines logo]()
$497
This United Airlines deal was found by Cheapflights users on 9/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/3010:45 pm -
1 stop12h 23m
Wed 2/33:55 pm -
1 stop9h 44m
Deal found 9/7![United Airlines logo]()
$509
This Delta deal was found by Cheapflights users on 9/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2411:59 pm -
1 stop7h 48m
Fri 10/3011:51 am -
2 stops13h 07m
Deal found 9/6![Delta logo]()
$626
This American Airlines deal was found by Cheapflights users on 9/4. 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 10/308:39 pm -
1 stop10h 15m
Sun 11/12:26 pm -
1 stop10h 45m
Deal found 9/4![American Airlines logo]()
$545
This United Airlines deal was found by Cheapflights users on 9/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/177:05 am -
2 stops25h 36m
Fri 12/2512:22 pm -
1 stop9h 44m
Deal found 9/6![United Airlines logo]()
$607
This American Airlines deal was found by Cheapflights users on 9/3. 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 10/168:39 pm -
1 stop10h 15m
Sat 10/241:43 pm -
2 stops12h 27m
Deal found 9/3![American Airlines logo]()
$614
Last-minute flights from Seattle to Key WestDiscover last-minute flight deals from Seattle to Key West. Data last updated September 8, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Key West. Data last updated September 8, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 9/4. 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.
Tue 9/86:00 am -
1 stop8h 23m
Tue 9/226:19 pm -
1 stop8h 39m
Deal found 9/4![Delta logo]()
$575
This American Airlines deal was found by Cheapflights users on 9/4. 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 10/28:50 pm -
1 stop10h 01m
Fri 10/94:45 pm -
1 stop9h 25m
Deal found 9/4![American Airlines logo]()
$619
This American Airlines deal was found by Cheapflights users on 9/3. 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 10/168:39 pm -
1 stop10h 15m
Sat 10/244:45 pm -
1 stop9h 25m
Deal found 9/3![American Airlines logo]()
$492
This American Airlines deal was found by Cheapflights users on 9/6. 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 10/216:00 am -
1 stop9h 49m
Wed 10/285:28 pm -
1 stop9h 31m
Deal found 9/6![American Airlines logo]()
$438
This United Airlines deal was found by Cheapflights users on 9/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2410:48 pm -
1 stop12h 06m
Fri 10/304:10 pm -
1 stop10h 49m
Deal found 9/5![United Airlines logo]()
$399
This American Airlines deal was found by Cheapflights users on 9/6. 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.
Sat 10/246:00 am -
1 stop9h 49m
Fri 10/302:34 pm -
1 stop10h 23m
Deal found 9/6![American Airlines logo]()
$493
This Delta deal was found by Cheapflights users on 9/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2411:59 pm -
1 stop7h 48m
Fri 10/3011:51 am -
2 stops13h 07m
Deal found 9/6![Delta logo]()
$626
This American Airlines deal was found by Cheapflights users on 9/4. 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 10/308:39 pm -
1 stop10h 15m
Sun 11/12:26 pm -
1 stop10h 45m
Deal found 9/4![American Airlines logo]()
$545
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 September 8, 2026.
Search for one-way flight options from Seattle to Key West. Find affordable one-way fares based on user searches. Data last updated September 8, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/118:55 pm -
2 stops34h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$239
This Kiwi.com deal was found by Cheapflights users on 9/4. 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.
Sun 10/49:45 pm -
3 stops56h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Multiple Airlines logo]()
$242
This Kiwi.com deal was found by Cheapflights users on 9/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/125:25 pm -
2 stops13h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 9/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/197:10 pm -
2 stops36h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$304
This American Airlines deal was found by Cheapflights users on 9/4. 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 10/410:36 pm -
1 stop10h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![American Airlines logo]()
$313
This American Airlines deal was found by Cheapflights users on 9/7. 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 12/115:10 am -
1 stop8h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![American Airlines logo]()
$368
This United Airlines deal was found by Cheapflights users on 9/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/45:07 pm -
2 stops17h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![United Airlines logo]()
$413
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 September 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $399 (United Airlines) |
One-way from | $239 (Kiwi.com) |
Popular in | December |
Cheapest in | July |
Average price | $619 |
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 September 8, 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
Sun 10/4
9:45 pm-9:24 am
3 stops56h 39m
Key West
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$242
SeattleKey West
SEA Seattle/Tacoma Intl - EYW Key West
SEAEYW
Seattle/Tacoma Intl
Sat 12/12
5:25 pm-10:19 am
2 stops13h 54m
Key West
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$250
Quickest round-trip
SeattleKey West
SEA Seattle/Tacoma Intl - EYW Key West
SEAEYW
Seattle/Tacoma Intl
Sun 10/4
10:36 pm-12:08 pm
1 stop10h 32m
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
Fri 1/15
11:31 pm-1:11 pm
1 stop10h 40m
Key West
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$353
SeattleKey West
SEA Seattle/Tacoma Intl - EYW Key West
SEAEYW
Seattle/Tacoma Intl
Sun 10/4
5:07 pm-1:29 pm
2 stops17h 22m
Key West
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$413
SeattleKey West
SEA Seattle/Tacoma Intl - EYW Key West
SEAEYW
Seattle/Tacoma Intl
Wed 11/25
5:40 am-6:47 pm
1 stop10h 07m
Key West
Tue 12/1
4:43 pm-11:33 pm
1 stop9h 50m
$497
SeattleKey West
SEA Seattle/Tacoma Intl - EYW Key West
SEAEYW
Seattle/Tacoma Intl
Sat 1/30
10:45 pm-2:08 pm
1 stop12h 23m
Key West
Wed 2/3
3:55 pm-10:39 pm
1 stop9h 44m
$509
SeattleKey West
SEA Seattle/Tacoma Intl - EYW Key West
SEAEYW
Seattle/Tacoma Intl
Fri 10/30
8:39 pm-9:54 am
1 stop10h 15m
Key West
Sun 11/1
2:26 pm-10:11 pm
1 stop10h 45m
$545
SeattleKey West
SEA Seattle/Tacoma Intl - EYW Key West
SEAEYW
Seattle/Tacoma Intl
Thu 12/17
7:05 am-11:41 am
2 stops25h 36m
Key West
Fri 12/25
12:22 pm-7:06 pm
1 stop9h 44m
$607
SeattleKey West
SEA Seattle/Tacoma Intl - EYW Key West
SEAEYW
Seattle/Tacoma Intl
Fri 10/16
8:39 pm-9:54 am
1 stop10h 15m
Key West
Sat 10/24
1:43 pm-11:10 pm
2 stops12h 27m
$614
Showing 1-10 of 11 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 September.
| 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 $1,149). 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 $574 and $646 in October.The cheapest round-trip price found within the last 5 days was $399 on United Airlines (Oct 24-Oct 30).
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 September 8, 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.
Entertainment
7.8
Crew
8.5
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Crew
8.5
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Crew
8.5
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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.
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Complete your trip
Complete your trip to Key West by adding a car rental and/or hotel reservation to your travel itinerary.
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Other flights to Key West
Explore flights to Key West departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 8, 2026.
Seattle and Key West flights
Browse other Seattle and Key West flight options. Last updated on September 8, 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on September 8, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 7,457,451 searches. Data last updated September 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$348 | Average$497 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$588 | Average$716 | FlexibilityNo cancel fee | On-timeN/A |