How long is the flight from State of Washington to Kos?

For as low as $1,615, SWISS can have you in Kos from State of Washington in 37h 02m. The distance from State of Washington to Kos is about 6312 mi.

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.

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).

What is the cheapest time of day to fly from WA to KGS?

When flying from State of Washington to Kos, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What airport do you fly into for flights to Kos from Washington?

Located just 12.8 mi from the city center, Kos (KGS) is the airport most travelers will use when flying to Kos from Washington.

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

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

How can I find direct flights from Washington to Kos?

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

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

Yes. Cheapflights offers flight deals from Washington 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.

$1,615+ Flights from Washington to Kos

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Cheap flight deals from Washington to Kos

Round-trip from	$1,615 (SWISS)

From Washington to Kos

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Cheapest flights from Washington to Kos
Explore the most affordable flight options available from Washington to Kos. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

Fri 10/173:28 pmSEA - KGS

2 stops37h 02mSWISS

Tue 10/218:30 pmKGS - SEA

2 stops36h 45mSWISS

Deal found 9/10

$1,615

Best flights from Washington to Kos
Discover carefully curated flight deals from Washington to Kos that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 11, 2025.

Fri 10/173:28 pmSEA - KGS

2 stops37h 02mSWISS

Tue 10/218:30 pmKGS - SEA

2 stops36h 45mSWISS

Deal found 9/9

$1,615

Last-minute flights from Washington to Kos
Discover last-minute flight deals from Washington to Kos. Data last updated September 11, 2025 and is based on user searches.

Fri 10/173:28 pmSEA - KGS

2 stops37h 02mSWISS

Tue 10/218:30 pmKGS - SEA

2 stops36h 45mSWISS

Deal found 9/10

$1,615

Fly from

Fly to

Route

Depart

Return

Price

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

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Best time to book a flight from Washington to Kos

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

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

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Related info for your journey

What airport do you fly into for flights to Kos from Washington?
Located just 12.8 mi from the city center, Kos (KGS) is the airport most travelers will use when flying to Kos from Washington.
How long is the flight from State of Washington to Kos?
For as low as $1,615, SWISS can have you in Kos from State of Washington in 37h 02m. The distance from State of Washington to Kos is about 6312 mi.
Can I find deals for flights from Washington to Kos that include hotel bookings?
Yes. In addition to deals on Washington to Kos flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Washington to Kos?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Kos.
Can I find deals for business class flights from Washington to Kos?
Yes. Cheapflights offers flight deals from Washington 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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$1,615+ Cheap flights from Washington 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 10/17. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Washington to Kos with Cheapflights

1. Tell us where you want to go

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3. Compare prices and book

Cheap flight deals from Washington to Kos

Keep the following information in mind while searching for Washington to Kos flight deals. Data was last updated September 11, 2025.

Round-trip from

Find flight deals from Washington to Kos

Cheapest flights from Washington to KosExplore the most affordable flight options available from Washington to Kos. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

Explore the most affordable flight options available from Washington to Kos. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

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Use the filters below to find and compare flights from Washington to Kos that are best for you.

Best time to book a flight from Washington to Kos

Have a flexible travel schedule? Discover the best time to fly to Kos from Washington with our price prediction graph.

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

Related info for your journey

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

What airport do you fly into for flights to Kos from Washington?

How long is the flight from State of Washington to Kos?

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

How can I find direct flights from Washington to Kos?

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

Browse thousands of different options on Cheapflights for your next trip

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Cheapest flights from Washington to Kos
Explore the most affordable flight options available from Washington to Kos. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.