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Kos

$876+ 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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KGS
Oct 29 — Nov 51
Wed 10/29
Wed 11/5
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 September 29, 2025.

Round-trip from

$876
(Mytrip)
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 September 29, 2025.

This Mytrip deal was found by Cheapflights users on 9/28. 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.
Wed 11/122:35 pmSEA - KGS
3 stops20h 40mMultiple Airlines
Wed 11/198:35 pmKGS - SEA
3 stops30h 25mMultiple Airlines
Deal found 9/28$876
This Gurufare deal was found by Cheapflights users on 9/27. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/288:00 amSEA - KGS
2 stops26h 00mAustrian Airlines
Sun 10/510:00 amKGS - SEA
2 stops44h 44mAustrian Airlines
Deal found 9/27$1,261
This FlightHub deal was found by Cheapflights users on 9/27. 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.
Sat 11/228:10 amSEA - KGS
2 stops22h 55mMultiple Airlines
Sun 11/3012:35 pmKGS - SEA
2 stops33h 35mMultiple Airlines
Deal found 9/27$1,278
This Mytrip deal was found by Cheapflights users on 9/27. 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 11/215:50 amSEA - KGS
3 stops24h 20mMultiple Airlines
Sun 11/304:15 pmKGS - SEA
2 stops34h 50mMultiple Airlines
Deal found 9/27$1,394
This FlightHub deal was found by Cheapflights users on 9/27. 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.
Sat 11/228:10 amSEA - KGS
2 stops22h 55mMultiple Airlines
Sat 11/298:35 pmKGS - SEA
2 stops26h 45mMultiple Airlines
Deal found 9/27$1,435
This Mytrip deal was found by Cheapflights users on 9/27. 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.
Sun 9/283:45 pmSEA - KGS
2 stops20h 55mMultiple Airlines
Sun 10/510:25 pmKGS - SEA
3 stops29h 25mMultiple Airlines
Deal found 9/27$1,505
This SWISS deal was found by Cheapflights users on 9/26. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/173:28 pmSEA - KGS
2 stops37h 02mSWISS
Tue 10/218:30 pmKGS - SEA
2 stops36h 45mSWISS
Deal found 9/26$1,615

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 September 29, 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

Wed 11/12

2:35 pm-9:15 pm

3 stops20h 40m

Kos

Wed 11/19

8:35 pm-5:00 pm

3 stops30h 25m

$876

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Sat 11/22

8:10 am-5:05 pm

2 stops22h 55m

Kos

Sun 11/30

12:35 pm-12:10 pm

2 stops33h 35m

$1,278

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Fri 11/21

5:50 am-4:10 pm

3 stops24h 20m

Kos

Sun 11/30

4:15 pm-5:05 pm

2 stops34h 50m

$1,394

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Sat 11/22

8:10 am-5:05 pm

2 stops22h 55m

Kos

Sat 11/29

8:35 pm-1:20 pm

2 stops26h 45m

$1,435

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Fri 10/17

3:28 pm-2:30 pm

2 stops37h 02m

Kos

Tue 10/21

8:30 pm-11:15 pm

2 stops36h 45m

$1,615

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Fri 11/21

2:00 pm-8:05 pm

2 stops20h 05m

Kos

Sat 11/29

4:40 pm-1:20 pm

2 stops30h 40m

$1,678

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/28

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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