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$387+ 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 10/29. Fares are subject to change and may not be available on all flights or dates of travel.
EYW — SEA
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheap 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 July 3, 2025.

Round-trip from

$387
(Delta)

Popular in

November

Cheapest in

December

Average price

$587
From Key West to Seattle/Tacoma Intl
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High demand for flights, 4% potential price rise
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Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Key West to Seattle

Cheapest flights from Key West to Seattle
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 July 3, 2025.

This Delta deal was found by Cheapflights users on 7/1. 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 10/296:00 pmEYW - SEA
1 stop9h 11mDelta
Sat 11/110:20 pmSEA - EYW
1 stop10h 39mDelta
Deal found 7/1$387
This American Airlines deal was found by Cheapflights users on 7/2. 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 7/1812:47 pmEYW - SEA
1 stop10h 59mAmerican Airlines
Tue 7/2210:43 pmSEA - EYW
1 stop12h 08mAmerican Airlines
Deal found 7/2$404
This United Airlines deal was found by Cheapflights users on 7/1. 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.
Tue 7/222:12 pmEYW - SEA
3 stops37h 47mUnited Airlines
Tue 8/127:34 pmSEA - EYW
2 stops14h 38mUnited Airlines
Deal found 7/1$654
This Mytrip deal was found by Cheapflights users on 7/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/1810:02 amEYW - SEA
3 stops33h 23mMultiple Airlines
Tue 7/225:30 pmSEA - EYW
2 stops12h 52mMultiple Airlines
Deal found 7/2$671

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 2,558,603 searches. Data last updated July 3, 2025.
Use the filters below to find and compare flights from Key West to Seattle that are best for you.

Fly from

Key West

Fly to

Seattle

Route

Depart

Return

Price

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Wed 10/29

6:00 pm-12:11 am

1 stop9h 11m

Seattle/Tacoma Intl

Sat 11/1

10:20 pm-11:59 am

1 stop10h 39m

$387

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Fri 7/18

12:47 pm-8:46 pm

1 stop10h 59m

Seattle/Tacoma Intl

Tue 7/22

10:43 pm-1:51 pm

1 stop12h 08m

$404

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Tue 7/22

2:12 pm-12:59 am

3 stops37h 47m

Seattle/Tacoma Intl

Tue 8/12

7:34 pm-1:12 pm

2 stops14h 38m

$654

Key WestSeattle

EYW - SEA

EYWSEA

Key West

Fri 7/18

10:02 am-4:25 pm

3 stops33h 23m

Seattle/Tacoma Intl

Tue 7/22

5:30 pm-9:22 am

2 stops12h 52m

$671

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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.
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 Key West to Seattle

What is the cheapest time of day to fly from EYW to SEA?

Find hourly flight availability from Key West to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

A simple way to save on the total cost of your ticket is to fly from Key West to Seattle at noon. If you’re flexible enough to do this you can expect to save up to 4% on your trip compared to booking a flight in the morning.

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

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated July 3, 2025.
See what other customers who have flown with Delta, United Airlines, and American Airlines from Key West to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Delta
8.0
Very good
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
United Airlines
7.4
Good
8,844 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.

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.

  • What are the cheapest airlines flying from Key West to Seattle round-trip?

    Our cheapest airline available from Key West to Seattle is Delta. Our recent data shows that you can find tickets from as low as $387 on this airline. Additional options worth looking into are American Airlines and United Airlines, starting at $404 and $654 round-trip. These flights start at 21% lower than the current average price 3 months from now.

  • Can I find deals for flights from Key West to Seattle that include hotel bookings?

    Yes. In addition to deals on Key West to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Key West to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Key West to Seattle.

  • Can I find deals for business class flights from Key West to Seattle?

    Yes. Cheapflights offers flight deals from Key West to Seattle 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 Key West to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Key West to Seattle (average of $238). Flying from Key West to Seattle in July is currently the most expensive (average of $390). 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

Traveling to a place near Key West?

Book flights to Key West if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lacey
Leavenworth
Lynnwood
Renton
Olympia
Shoreline
Puyallup
Cle Elum
Centralia
Kent
Federal Way
Chehalis
Kirkland
Aberdeen
Shelton

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Top airline flying from Key West to Seattle

Discover the top airline that operate flights from Key West to Seattle. 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 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$278Average$587FlexibilityNo cancel feeOn-time71%

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