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Kos

$384+ Cheap flights from Seattle (SEA) to Kos (KGS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KGS
Sep 16 — Sep 231
Wed 9/16
Wed 9/23
1 adult, Economy
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Cheap flight deals from Seattle to Kos

Cheapest flights from Seattle to Kos
Explore the most affordable flight options available from Seattle to Kos. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 17, 2026.

This Cheapflightsfares deal was found by Cheapflights users on 8/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:00 am -
2 stops26h 55m
Tue 10/68:30 pm -
2 stops36h 26m
Deal found 8/15$918
This Booking.com deal was found by Cheapflights users on 8/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/296:50 pm -
1 stop14h 15m
Tue 10/68:30 pm -
2 stops36h 12m
Deal found 8/15$978
This Emirates deal was found by Cheapflights users on 8/16. 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 Emirates is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/185:15 pm -
2 stops38h 20m
Thu 10/226:05 pm -
2 stops29h 20m
Deal found 8/16$1,830

Find flight deals from Seattle to Kos

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Kos (KGS). 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 August 17, 2026.

Round-trip from

$918
(Cheapflightsfares)

One-way from

$384
(Kiwi.com)
From Seattle/Tacoma Intl to Kos
Search Deals
One-way flight from Seattle/Tacoma Intl to Kos
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Kos 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 August 17, 2026.
Use the filters below to find and compare flights from Seattle to Kos that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

SeattleKos

SEA Seattle/Tacoma Intl - KGS Kos

SEAKGS

Seattle/Tacoma Intl

Tue 9/29

5:50 am-9:55 pm

3 stops30h 05m

Kos

Tue 10/6

6:05 pm-6:32 pm

3 stops34h 27m

$1,124

SeattleKos

SEA Seattle/Tacoma Intl - KGS Kos

SEAKGS

Seattle/Tacoma Intl

Sun 10/18

5:15 pm-5:35 pm

2 stops38h 20m

Kos

Thu 10/22

1:05 pm-1:25 pm

2 stops34h 20m

$1,830
Cheapest one-way
Quickest one-way

SeattleKos

SEA Seattle/Tacoma Intl - KGS Kos

SEAKGS

Seattle/Tacoma Intl

Tue 10/27

3:35 pm-11:35 am

3 stops35h 00m

$384

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Sorted by cheapest first

Best time to book a flight from Seattle to Kos

Have a flexible travel schedule? Discover the best time to fly to Kos from Seattle 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.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Kos. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seattle to Kos?

    For as low as $1,830, Emirates can have you in Kos from Seattle in 38h 20m. The distance from Seattle to Kos is about 6312 mi.

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

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

  • How can I find direct flights from Seattle to Kos?

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

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

    Yes. Cheapflights offers flight deals from Seattle to Kos by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for Seattle to Kos

See prices for flight routes from nearby airports that may be better suited for you.
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