$323+ Cheap flights from Key West to Seattle (EYW - SEA)
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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
EYW — SEA
Oct 31 — Nov 71
Round-trip
1 adult, Economy
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Find cheap flights from Key West to Seattle 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 Key West to Seattle
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Best
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One-way
Cheapest flights from Key West to SeattleExplore the most affordable flight options available from Key West to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 1, 2026.
Explore the most affordable flight options available from Key West to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 1, 2026.
This American Airlines deal was found by Cheapflights users on 9/27. 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 10/132:34 pm -
1 stop10h 23m
Sat 10/176:00 am -
1 stop9h 49m
Deal found 9/27![American Airlines logo]()
$575
This Delta deal was found by Cheapflights users on 9/27. 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 10/156:10 pm -
1 stop8h 42m
Wed 10/286:00 am -
1 stop8h 15m
Deal found 9/27![Delta logo]()
$586
This American Airlines deal was found by Cheapflights users on 9/30. 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 10/155:28 pm -
1 stop9h 31m
Wed 10/285:00 am -
2 stops11h 33m
Deal found 9/30![American Airlines logo]()
$708
This American Airlines deal was found by Cheapflights users on 9/28. 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 12/222:45 pm -
1 stop11h 24m
Sun 12/2711:17 pm -
1 stop11h 48m
Deal found 9/28![American Airlines logo]()
$760
This American Airlines deal was found by Cheapflights users on 9/30. 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 10/44:45 pm -
1 stop9h 10m
Tue 10/65:00 am -
1 stop8h 54m
Deal found 9/30![American Airlines logo]()
$1,005
Best flights from Key West to SeattleDiscover carefully curated flight deals from Key West to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 1, 2026.
Discover carefully curated flight deals from Key West to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 1, 2026.
This American Airlines deal was found by Cheapflights users on 9/27. 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 10/132:34 pm -
1 stop10h 23m
Sat 10/176:00 am -
1 stop9h 49m
Deal found 9/27![American Airlines logo]()
$575
This Delta deal was found by Cheapflights users on 9/27. 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 10/156:10 pm -
1 stop8h 42m
Wed 10/286:00 am -
1 stop8h 15m
Deal found 9/27![Delta logo]()
$586
This United Airlines deal was found by Cheapflights users on 9/28. 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 10/142:15 pm -
1 stop10h 40m
Sat 10/1710:48 pm -
1 stop11h 41m
Deal found 9/28![United Airlines logo]()
$1,088
This American Airlines deal was found by Cheapflights users on 9/30. 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 10/151:43 pm -
2 stops13h 27m
Wed 10/285:00 am -
2 stops11h 33m
Deal found 9/30![American Airlines logo]()
$779
This American Airlines deal was found by Cheapflights users on 9/28. 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 12/223:02 pm -
2 stops11h 40m
Sun 12/2711:59 pm -
2 stops11h 06m
Deal found 9/28![American Airlines logo]()
$829
Last-minute flights from Key West to SeattleDiscover last-minute flight deals from Key West to Seattle. Data last updated October 1, 2026 and is based on user searches.
Discover last-minute flight deals from Key West to Seattle. Data last updated October 1, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 9/30. 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 10/44:45 pm -
1 stop9h 10m
Tue 10/65:00 am -
1 stop8h 54m
Deal found 9/30![American Airlines logo]()
$1,005
This American Airlines deal was found by Cheapflights users on 9/27. 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 10/132:34 pm -
1 stop10h 23m
Sat 10/176:00 am -
1 stop9h 49m
Deal found 9/27![American Airlines logo]()
$575
This United Airlines deal was found by Cheapflights users on 9/28. 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 10/142:15 pm -
1 stop10h 40m
Sat 10/1710:48 pm -
1 stop11h 41m
Deal found 9/28![United Airlines logo]()
$1,088
This Delta deal was found by Cheapflights users on 9/27. 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 10/156:10 pm -
1 stop8h 42m
Wed 10/286:00 am -
1 stop8h 15m
Deal found 9/27![Delta logo]()
$586
This American Airlines deal was found by Cheapflights users on 9/30. 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 10/155:28 pm -
1 stop9h 31m
Wed 10/285:00 am -
2 stops11h 33m
Deal found 9/30![American Airlines logo]()
$708
One-way flights from Key West to SeattleSearch for one-way flight options from Key West to Seattle. Find affordable one-way fares based on user searches. Data last updated October 1, 2026.
Search for one-way flight options from Key West to Seattle. Find affordable one-way fares based on user searches. Data last updated October 1, 2026.
This Delta deal was found by Cheapflights users on 9/29. 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 11/127:30 am -
1 stop10h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Delta logo]()
$323
This American Airlines deal was found by Cheapflights users on 9/30. 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 11/1211:14 am -
2 stops13h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![American Airlines logo]()
$458
This United Airlines deal was found by Cheapflights users on 9/30. 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 11/122:50 pm -
3 stops33h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![United Airlines logo]()
$598
This Delta deal was found by Cheapflights users on 9/27. 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.
Wed 12/26:06 pm -
1 stop8h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Delta logo]()
$708
This Alaska Airlines deal was found by Cheapflights users on 9/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/21:08 pm -
1 stop10h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Alaska Airlines logo]()
$2,230
Find flight deals from Key West to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Key West (EYW) to Seattle (SEA). 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 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $575 (American Airlines) |
One-way from | $323 (Delta) |
Cheapflights Fare Finder
Customize your flight search to find flights from Key West to Seattle 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 1, 2026.
Use the filters below to find and compare flights from Key West to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Key WestSeattle
EYW Key West - SEA Seattle/Tacoma Intl
EYWSEA
Key West
Thu 11/12
7:30 am-2:30 pm
1 stop10h 00m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$323
Key WestSeattle
EYW Key West - SEA Seattle/Tacoma Intl
EYWSEA
Key West
Tue 10/13
2:34 pm-9:57 pm
1 stop10h 23m
Seattle/Tacoma Intl
Sat 10/17
6:00 am-6:49 pm
1 stop9h 49m
$575
Key WestSeattle
EYW Key West - SEA Seattle/Tacoma Intl
EYWSEA
Key West
Thu 10/15
6:10 pm-11:52 pm
1 stop8h 42m
Seattle/Tacoma Intl
Wed 10/28
6:00 am-5:15 pm
1 stop8h 15m
$586
Key WestSeattle
EYW Key West - SEA Seattle/Tacoma Intl
EYWSEA
Key West
Thu 11/12
2:50 pm-8:56 pm
3 stops33h 06m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$598
Quickest round-trip
Key WestSeattle
EYW Key West - SEA Seattle/Tacoma Intl
EYWSEA
Key West
Wed 12/2
6:06 pm-11:55 pm
1 stop8h 49m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$708
Key WestSeattle
EYW Key West - SEA Seattle/Tacoma Intl
EYWSEA
Key West
Thu 10/15
1:43 pm-12:10 am
2 stops13h 27m
Seattle/Tacoma Intl
Wed 10/28
5:00 am-7:33 pm
2 stops11h 33m
$779
Key WestSeattle
EYW Key West - SEA Seattle/Tacoma Intl
EYWSEA
Key West
Tue 12/22
3:02 pm-11:42 pm
2 stops11h 40m
Seattle/Tacoma Intl
Sun 12/27
11:59 pm-2:05 pm
2 stops11h 06m
$829
Key WestSeattle
EYW Key West - SEA Seattle/Tacoma Intl
EYWSEA
Key West
Wed 10/14
2:15 pm-9:55 pm
1 stop10h 40m
Seattle/Tacoma Intl
Sat 10/17
10:48 pm-1:29 pm
1 stop11h 41m
$1,088
Key WestSeattle
EYW Key West - SEA Seattle/Tacoma Intl
EYWSEA
Key West
Wed 12/2
1:08 pm-8:22 pm
1 stop10h 14m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$2,230
Sorted by cheapest first
Compare providers for flights from Key West to Seattle
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 Key West to Seattle 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 Key West-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Key West-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Key West-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Key West-Seattle 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 Key West-Seattle 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 Key West to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Key West with our price prediction graph.
EYW-SEA
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.
Related info for your journey
Find useful and relevant information for your journey from Key West to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Renton
Tacoma
Lacey
Leavenworth
Olympia
Tukwila
Snoqualmie
Puyallup
Lynnwood
Centralia
Kent
Tumwater
Ocean Shores
Ellensburg
Issaquah
Marysville
Lakewood
Fife
Poulsbo
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