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Kos

$636+ Cheap flights from Washington 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 5/17. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KGS
Apr 8 — Apr 151
Tue 4/8
Tue 4/15
1 adult, Economy
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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 April 3, 2025.

Round-trip from

$843
(Mytrip)

One-way from

$636
(Air Canada)
From Washington to Kos
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One-way flight from Washington to Kos
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Find flight deals from Washington to Kos

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 April 3, 2025.

This Mytrip deal was found by Cheapflights users on 4/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/173:45 pmSEA - KGS
3 stops33h 10mMultiple Airlines
Sat 5/246:00 amKGS - SEA
3 stops21h 50mMultiple Airlines
Deal found 4/2$843
This Gurufare deal was found by Cheapflights users on 4/2. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/122:15 pmSEA - KGS
1 stop36h 25mLufthansa
Sat 5/318:15 pmKGS - SEA
1 stop30h 44mLufthansa
Deal found 4/2$1,214
This SWISS deal was found by Cheapflights users on 4/2. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/172:40 pmSEA - KGS
2 stops42h 05mSWISS
Sat 5/248:45 pmKGS - SEA
2 stops31h 48mSWISS
Deal found 4/2$1,359

Cheapflights Fare Finder

Customize your flight search to find flights from Washington 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 April 3, 2025.
Use the filters below to find and compare flights from Washington to Kos that are best for you.

Fly from

Washington

Fly to

Kos

Route

Depart

Return

Price

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Sat 5/17

3:45 pm-10:55 am

3 stops33h 10m

Kos

Sat 5/24

6:00 am-5:50 pm

3 stops21h 50m

$843

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Mon 5/12

2:15 pm-12:40 pm

1 stop36h 25m

Kos

Sat 5/31

8:15 pm-4:59 pm

1 stop30h 44m

$1,214

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Sat 5/17

2:40 pm-6:45 pm

2 stops42h 05m

Kos

Sat 5/24

8:45 pm-6:33 pm

2 stops31h 48m

$1,359

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Sat 5/17

11:30 am-8:00 pm

2 stops46h 30m

$636

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/2

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.

Cheapflights Insights

Everything you need to know about your flight from Washington 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 April 3, 2025.
SWISS
7.5
Good
1,574 reviews

Crew

8.2

Food

7.0

Boarding

7.6

Comfort

7.4

Overall

7.5

Entertainment

6.7

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

ZRH - ATH

The website is difficult to navigate. You pay for everything. The carry on baggage policy is complicated. The food choices were poor and the seat was uncomfortable.
SWISS
7.5
Good
1,574 reviews
SWISS
7.5
Good
1,574 reviews

Crew

8.2

Food

7.0

Boarding

7.6

Comfort

7.4

Overall

7.5

Entertainment

6.7

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

ZRH - ATH

The website is difficult to navigate. You pay for everything. The carry on baggage policy is complicated. The food choices were poor and the seat was uncomfortable.
Lufthansa
6.7
Okay
6,963 reviews
SWISS
7.5
Good
1,574 reviews

Crew

8.2

Food

7.0

Boarding

7.6

Comfort

7.4

Overall

7.5

Entertainment

6.7

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

ZRH - ATH

The website is difficult to navigate. You pay for everything. The carry on baggage policy is complicated. The food choices were poor and the seat was uncomfortable.

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?

    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.

See more FAQs

Traveling to a place near Washington?

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Kardamena

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See prices for flight routes from nearby airports that may be better suited for you.
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