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Kos

$769+ 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KGS
août 18 — août 251
lun. 8/18
lun. 8/25
1 adult, Economy
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Cheap 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 août 13, 2025.

Round-trip from

$769
(Expedia)
From Seattle/Tacoma Intl to Kos
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Find 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 août 13, 2025.

This Expedia deal was found by Cheapflights users on 8/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 9/102:29 pmSEA - KGS
2 stops38h 41mSWISS
mer. 9/178:40 pmKGS - SEA
2 stops31h 56mSWISS
Deal found 8/11$769
This FlightHub deal was found by Cheapflights users on 8/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 9/102:20 pmSEA - KGS
1 stop18h 20mMultiple Airlines
mer. 9/178:40 pmKGS - SEA
2 stops31h 56mMultiple Airlines
Deal found 8/11$771
This Expedia deal was found by Cheapflights users on 8/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 9/102:20 pmSEA - KGS
1 stop18h 20mLufthansa
mer. 9/171:30 pmKGS - SEA
1 stop32h 25mLufthansa
Deal found 8/11$783
This Ovago deal was found by Cheapflights users on 8/11. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 10/81:30 pmSEA - KGS
1 stop21h 15mBritish Airways
ven. 10/171:45 pmKGS - SEA
1 stop31h 50mBritish Airways
Deal found 8/11$884
This Lufthansa deal was found by Cheapflights users on 8/11. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 10/82:20 pmSEA - KGS
1 stop18h 20mLufthansa
sam. 10/188:15 pmKGS - SEA
1 stop30h 44mLufthansa
Deal found 8/11$1,053
This Gotogate deal was found by Cheapflights users on 8/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 10/85:30 amSEA - KGS
2 stops27h 10mMultiple Airlines
sam. 10/188:15 pmKGS - SEA
2 stops36h 01mMultiple Airlines
Deal found 8/11$1,077
This Mytrip deal was found by Cheapflights users on 8/11. 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.
mer. 10/88:40 amSEA - KGS
3 stops29h 15mMultiple Airlines
ven. 10/176:10 pmKGS - SEA
3 stops33h 05mMultiple Airlines
Deal found 8/11$1,276

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 août 13, 2025.
Use the filters below to find and compare flights from Seattle to Kos that are best for you.

Fly from

Seattle

Fly to

Kos

Route

Depart

Return

Price

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

mer. 9/10

2:29 pm-3:10 pm

2 stops38h 41m

Kos

mer. 9/17

8:40 pm-6:36 pm

2 stops31h 56m

$769

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

mer. 9/10

2:20 pm-6:40 pm

1 stop18h 20m

Kos

mer. 9/17

8:40 pm-6:36 pm

2 stops31h 56m

$771

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

mer. 9/10

2:20 pm-6:40 pm

1 stop18h 20m

Kos

mer. 9/17

1:30 pm-11:55 am

1 stop32h 25m

$783

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

mer. 10/8

1:30 pm-8:45 pm

1 stop21h 15m

Kos

ven. 10/17

1:45 pm-11:35 am

1 stop31h 50m

$884

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

mer. 10/8

2:20 pm-6:40 pm

1 stop18h 20m

Kos

sam. 10/18

8:15 pm-4:59 pm

1 stop30h 44m

$1,053

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

mer. 10/8

5:30 am-6:40 pm

2 stops27h 10m

Kos

sam. 10/18

8:15 pm-10:16 pm

2 stops36h 01m

$1,077

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/11

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.

  • 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.

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