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$1,859+ Cheap flights from Seattle (SEA) to Kos (KGS)

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 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KGS
Aug 3 — Aug 101
Mon 8/3
Mon 8/10
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 July 4, 2026.

This British Airways deal was found by Cheapflights users on 7/3. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/287:56 pm
SEA
-
KGS
2 stops37h 54m
British Airways
Tue 9/12:20 pm
KGS
-
SEA
2 stops38h 12m
British Airways
Deal found 7/3$1,859
This Emirates 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 Emirates is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/285:15 pm
SEA
-
KGS
2 stops38h 15m
Emirates
Tue 9/16:10 pm
KGS
-
SEA
2 stops53h 15m
Emirates
Deal found 7/2$1,881

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 July 4, 2026.

Round-trip from

$1,881
(Emirates)
From Seattle/Tacoma Intl to Kos
Search Deals

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 July 4, 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 - KGS

SEAKGS

Seattle/Tacoma Intl

Fri 8/28

7:56 pm-7:50 pm

2 stops37h 54m

Kos

Tue 9/1

2:20 pm-6:32 pm

2 stops38h 12m

$1,859

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Fri 8/28

5:15 pm-5:30 pm

2 stops38h 15m

Kos

Tue 9/1

6:10 pm-1:25 pm

2 stops53h 15m

$1,881

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

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 $1,859, British Airways can have you in Kos from Seattle in 37h 54m. The distance from Seattle to Kos is about 6312 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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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