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Kos

$533+ 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 6/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KGS
Mar 30 — Apr 61
Sun 3/30
Sun 4/6
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 March 25, 2025.

Round-trip from

$709
(Gotogate)

One-way from

$533
(Kiwi.com)
From Seattle/Tacoma Intl to Kos
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One-way flight 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 March 25, 2025.

This Gotogate deal was found by Cheapflights users on 3/23. 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.
Wed 5/75:40 amSEA - KGS
2 stops27h 00mMultiple Airlines
Wed 5/141:30 pmKGS - SEA
1 stop32h 55mMultiple Airlines
Deal found 3/23$709
This Gotogate deal was found by Cheapflights users on 3/23. 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.
Wed 5/72:15 pmSEA - KGS
1 stop18h 25mLufthansa
Wed 5/141:30 pmKGS - SEA
1 stop32h 55mLufthansa
Deal found 3/23$732
This SWISS deal was found by Cheapflights users on 3/24. 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.
Thu 5/82:40 pmSEA - KGS
2 stops43h 15mSWISS
Thu 5/1511:05 amKGS - SEA
2 stops45h 37mSWISS
Deal found 3/24$986
This Emirates deal was found by Cheapflights users on 3/23. 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.
Wed 5/75:15 pmSEA - KGS
2 stops38h 15mEmirates
Wed 5/1411:25 amKGS - SEA
2 stops36h 00mEmirates
Deal found 3/23$2,733

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 March 25, 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 5/7

5:40 am-6:40 pm

2 stops27h 00m

Kos

Wed 5/14

1:30 pm-12:25 pm

1 stop32h 55m

$709

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Wed 5/7

2:15 pm-6:40 pm

1 stop18h 25m

Kos

Wed 5/14

1:30 pm-12:25 pm

1 stop32h 55m

$732

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Thu 5/8

2:40 pm-7:55 pm

2 stops43h 15m

Kos

Thu 5/15

11:05 am-10:42 pm

2 stops45h 37m

$986

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Wed 5/7

5:15 pm-5:30 pm

2 stops38h 15m

Kos

Wed 5/14

11:25 am-1:25 pm

2 stops36h 00m

$2,733

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Sun 6/15

7:05 am-10:40 pm

3 stops29h 35m

$533

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Thu 5/29

7:00 am-8:50 pm

2 stops27h 50m

$999

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Wed 5/28

5:15 pm-5:30 pm

2 stops38h 15m

$1,593

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/23

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.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Kos

Rainfall in Kos by month

Plan your trip to Kos by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Kos ranges from 0.1 - 6.7 inches per month. January is typically the wettest month, when rainfall can reach 6.7 in. July is typically the driest time to visit Kos when rainfall is around 0.1 in.

Temperature in Kos by month

Plan your trip to Kos by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Kos, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of February, when temperatures are typically at their lowest (around 50.0 F).

Reviews of airlines servicing Kos

Get insights into the airlines that provide service to Kos. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Kos. Reviews last updated March 25, 2025.
Emirates
8.0
Very good
3,190 reviews

Boarding

8.1

Entertainment

8.2

Comfort

8.0

Overall

8.0

Food

7.8

Crew

8.3

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2024

IAD - DXB

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.
Emirates
8.0
Very good
3,190 reviews
Emirates
8.0
Very good
3,190 reviews

Boarding

8.1

Entertainment

8.2

Comfort

8.0

Overall

8.0

Food

7.8

Crew

8.3

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2024

IAD - DXB

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.
Austrian Airlines
7.5
Good
769 reviews
Emirates
8.0
Very good
3,190 reviews

Boarding

8.1

Entertainment

8.2

Comfort

8.0

Overall

8.0

Food

7.8

Crew

8.3

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2024

IAD - DXB

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.
SWISS
7.5
Good
1,569 reviews
Emirates
8.0
Very good
3,190 reviews

Boarding

8.1

Entertainment

8.2

Comfort

8.0

Overall

8.0

Food

7.8

Crew

8.3

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2024

IAD - DXB

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.
Lufthansa
6.7
Okay
6,949 reviews
Emirates
8.0
Very good
3,190 reviews

Boarding

8.1

Entertainment

8.2

Comfort

8.0

Overall

8.0

Food

7.8

Crew

8.3

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2024

IAD - DXB

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.

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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