EYW - SEA

$329 Find Cheap Flights from Key West to Seattle - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Key West to Seattle departing on 8/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$441
Typical prices: $308-$471
American Airlines
Sat 9/5Fri 9/11
EYW - SEA • 1 stop
Cheapest one-way
$329
Multiple Airlines
Mon 8/10
EYW - SEA • 2 stops
Top airlines
Cheapest • from $441 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Key West and Seattle. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $308 (round-trip)
Shortest trip • 8h 50m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 100% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to Seattle!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Key West to Seattle (EYW-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Key West to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Key West to Seattle

Sat, Sep 5 - Fri, Sep 11
American Airlines Logo
7:10 pm - 12:20 am
EYW
-
SEA
8h 10m
1 stop
American Airlines Logo
6:40 am - 5:55 pm
SEA
-
EYW
8h 15m
1 stop
$441American Airlines
Thu, Sep 10 - Thu, Sep 17
American Airlines Logo
2:15 pm - 8:07 pm
EYW
-
SEA
8h 52m
1 stop
American Airlines Logo
8:50 pm - 9:51 am
SEA
-
EYW
10h 01m
1 stop
$492American Airlines
Tue, Sep 1 - Fri, Sep 11
American Airlines Logo
7:03 pm - 12:20 am
EYW
-
SEA
8h 17m
1 stop
American Airlines Logo
8:50 pm - 9:51 am
SEA
-
EYW
10h 01m
1 stop
$492American Airlines
Tue, Sep 1 - Fri, Sep 11
American Airlines Logo
1:50 pm - 10:26 pm
EYW
-
SEA
11h 36m
2 stops
American Airlines Logo
6:40 am - 5:55 pm
SEA
-
EYW
8h 15m
1 stop
$614American Airlines
Fri, Oct 2 - Mon, Oct 5
United Airlines Logo
2:15 pm - 9:55 pm
EYW
-
SEA
10h 40m
1 stop
United Airlines Logo
10:48 pm - 1:29 pm
SEA
-
EYW
11h 41m
1 stop
$646United Airlines
Fri, Oct 2 - Mon, Oct 5
United Airlines Logo
2:15 pm - 9:55 pm
EYW
-
SEA
10h 40m
1 stop
United Airlines Logo
10:48 pm - 1:29 pm
SEA
-
EYW
11h 41m
1 stop
$656United Airlines
Fri, Aug 14 - Mon, Aug 17
Delta Logo
1:59 pm - 7:05 pm
EYW
-
SEA
8h 06m
1 stop
Delta Logo
9:10 am - 7:57 pm
SEA
-
EYW
7h 47m
1 stop
$693Delta
Fri, Oct 2 - Mon, Oct 5
United Airlines Logo
2:15 pm - 6:52 pm
EYW
-
SEA
31h 37m
2 stops
United Airlines Logo
10:48 pm - 1:29 pm
SEA
-
EYW
11h 41m
1 stop
$756United Airlines
Fri, Oct 2 - Mon, Oct 5
United Airlines Logo
2:15 pm - 8:37 pm
EYW
-
SEA
33h 22m
3 stops
United Airlines Logo
10:48 pm - 1:29 pm
SEA
-
EYW
11h 41m
1 stop
$761United Airlines
Mon, Aug 17 - Fri, Aug 21
Delta Logo
6:15 pm - 11:57 pm
EYW
-
SEA
8h 42m
1 stop
Delta Logo
10:35 pm - 10:50 am
SEA
-
EYW
9h 15m
1 stop
$885Delta
Booking Insights

KAYAK's insights & trends for Key West to Seattle flights

Get data-powered insights and trends into flights from Key West to Seattle to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Key West to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Key West to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Key West to Seattle is May, where tickets cost $0 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $818 and $651 respectively.

Good to know

Low season

April

Cheapest flight

$329
Best time to beat the crowds with an average 31% drop in price.
Most popular time to fly and prices are also 14% lower on average.
Flight from Key West to Seattle

When to book flights from Key West to Seattle

Are your dates flexible? Find out the best times to travel from Key West to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Key West to Seattle

  • What is the cheapest flight from Key West to Seattle?

    In the last 5 days, the lowest price for a flight from Key West to Seattle was $329 for a one-way ticket and $441 for a round-trip.

  • Do I need a passport to fly between Key West and Seattle?

    No

  • Which aircraft models fly most regularly from Key West to Seattle?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Key West to Seattle?

    SkyTeam, and oneworld are the airline alliances operating flights between Key West and Seattle, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Key West to Seattle, Delta or American Airlines?

    The two airlines most popular with KAYAK users for flights from Key West to Seattle are Delta and American Airlines. With an average price for the route of $593 and an overall rating of 7.8, Delta is the most popular choice. American Airlines is also a great choice for the route, with an average price of $471 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from Key West to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Key West to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Key West to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Key West is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Key West to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Key West with another airline. Booking your flights between Key West and SEA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Key West to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Key West up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Key West to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Key West to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Key West to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
DeltaOverall score based on 8483 reviews
7.2Food
8.1Boarding
7.8Comfort
8.5Crew
7.8Entertainment
Airline reviews

Not really a “Delta” problem but worth mentioning: Boarding was a difficult process. TSA seemed understaffed and Pre-Check took longer than regular TSA. The supervisor was frazzled and yelled at travelers. Once through TSA, we had to put our carry-ons through another x-ray machine. Then queue up to board with both boarding pass and ID. Then, when we got to the stairs on the tarmac, we had to show our boarding pass again. Maybe this is just normal for Kona since the terminal is outdoors (but still a “secured” area).

6.0 GoodMary, Jun 2026
KOA - SEA
Read more Delta reviews

Not really a “Delta” problem but worth mentioning: Boarding was a difficult process. TSA seemed understaffed and Pre-Check took longer than regular TSA. The supervisor was frazzled and yelled at travelers. Once through TSA, we had to put our carry-ons through another x-ray machine. Then queue up to board with both boarding pass and ID. Then, when we got to the stairs on the tarmac, we had to show our boarding pass again. Maybe this is just normal for Kona since the terminal is outdoors (but still a “secured” area).

Checkin was good, fllight ws good. Onlly complaint is lack of foot on 6 hour flight from Seattle to Boston. Snacks were flimsy - chips and cookies. could have offered something more substantial for such a long flight. I know you can buy food in airport but for the price you pay for a ticket, they should step up for the passengers.

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

It was fine. 55 minute flight. No snacks or beverage service offered. Boarding went smoothly and my walker was waiting for me on the jet way.

My flight was cencaled due with the bad weather on Sunday the crew was poorly mistaken my luggage supposed depart with my flight instead I didn’t have my luggage for almost 3 days the website is poorly respond to my complain until I have someone to do it my connection smooth their not even respon or email me even the have my luggage

8 hours late and the plane smelled like urine, that smell in the morning when your child wet the bed in the night.

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

The worst part was I was NOT allowed in the lounge even though I was holding a first class ticket and have a premium American Express card. I have flown Business or First Class with many airlines. Delta is the ONLY one who does not extend this courtesy to anyone except people who hold the very expensive American Express card. As a result, I won’t fly Delta if I have any other choice.

Flight left early and arrived early. the whole trip was excellent.

Delta crushed it. Flight attendant in first was attentive and just never stopped. Honestly one of the best domestic flights I’ve been on.

Plane was super cold. No entertainment unless you were with mileage program Getting off the plane was super slow

Beverage service was not good. Also just one service in 5 hr 30 min flight. No ask fir water ir anything beside one time beverage service.

Flight was delayed because of a bird strike. They had another plane available within 45 minutes.

It was a code share with Alaska - would have been great if I actually made it on the plane, claimed I didn’t have a ticket or a seat even thought I was checked in.

The main problem was delay. The plane was at the gate early and bags were loaded. However, there was no crew for the flight. They were inbound from LGA and had to land and make their way to our gate. It took more than 40 minutes. Then, once the crew arrived and boarded, one of the crew members had to deplane and then a replacement crew member had to be found. It took another 40 minutes or so to get the final crew member. In all, we took off about 2 hours later than our scheduled departure time. Once in the air, the flight was great. Smooth most of the way. The crew was professional and efficient.

i suspect i caught flu on this flight as i could hear someone coughing a few rows back and ended up with flu a few days later. also tiresome to have to watch movies on my device by holding up smartphone screen, would have liked to have in seat display.

I had trouble finding a boarding pass because I had an hour between Flights and American did not see my flight I believe because I was ticketed through KAYAK. I did not have enough time to go to the desk before boarding so I went to the desk and told them while I was boarding and they had a boarding pass for me within three minutes. Nice. I paid extra to have more legroom and it is definitely worth it for a six hour flight. I would’ve paid for a decent dinner, but they didn’t offer anything but a snack box —not good for six hours.

Terrible flight seats where really uncomfortable I had body aches for 2 days and flight was delays almost two hours

Very smooth for one of the busiest travel days of the year and the crew was great.

Boarded late. Missed first landing attempt, landed almost an hour late and missed connecting flight.

Everything you need to know for your flight from Key West to Seattle

Information on your arrival and departure airports