HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Kos

$1,232+ Cheap flights from Washington, D.C. (WAS) 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 12/14. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — KGS
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington, D.C. to Kos with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Find flight deals from Washington, D.C. to Kos

Cheapest flights from Washington, D.C. to Kos
Explore the most affordable flight options available from Washington, D.C. to Kos. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Trip.com deal was found by Cheapflights users on 10/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/148:30 pmIAD - KGS
2 stops17h 45mMultiple Airlines
Sun 12/219:45 pmKGS - IAD
2 stops49h 55mMultiple Airlines
Deal found 10/30$1,232
This Ovago deal was found by Cheapflights users on 10/28. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/155:40 pmIAD - KGS
2 stops19h 25mMultiple Airlines
Sun 12/219:05 pmKGS - IAD
2 stops27h 00mMultiple Airlines
Deal found 10/28$1,317
This Expedia deal was found by Cheapflights users on 10/30. 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.
Sun 12/1411:13 amDCA - KGS
2 stops21h 32mMultiple Airlines
Sun 12/219:45 pmKGS - DCA
2 stops30h 45mMultiple Airlines
Deal found 10/30$1,482

Cheap flight deals from Washington, D.C. to Kos

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) 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 October 30, 2025.

Round-trip from

$1,232
(Trip.com)
From Washington, D.C. (WAS) to Kos
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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 October 30, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Kos that are best for you.

Fly from

Washington, D.C.

Fly to

Kos

Route

Depart

Return

Price

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Sun 12/14

8:30 pm-9:15 pm

2 stops17h 45m

Kos

Sun 12/21

9:45 pm-4:40 pm

2 stops49h 55m

$1,232

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Mon 12/15

5:40 pm-8:05 pm

2 stops19h 25m

Kos

Sun 12/21

9:05 pm-5:05 pm

2 stops27h 00m

$1,317

Washington, D.C.Kos

DCA - KGS

DCAKGS

Washington, D.C. Reagan-National

Sun 12/14

11:13 am-3:45 pm

2 stops21h 32m

Kos

Sun 12/21

9:45 pm-9:30 pm

2 stops30h 45m

$1,482

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Thu 3/26

11:15 am-5:05 pm

2 stops23h 50m

Kos

Mon 3/30

1:05 pm-8:40 am

2 stops26h 35m

$2,127

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Best time to book a flight from Washington, D.C. to Kos

Have a flexible travel schedule? Discover the best time to fly to Kos from Washington, D.C. 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, D.C. to Kos
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. 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, D.C.?

    Kos (KGS) is the airport you will fly into if you book a flight from Washington, D.C. to Kos. You should not have trouble finding flights to Kos from Washington, D.C.; the airport handles an average of 0 inbound flights from Washington, D.C. per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the Kos airport from Washington, D.C.. It is only a 12.8 mi journey from Kos (KGS) to Kos’s city center.

  • What are the most popular routes from Washington, D.C. to Kos?

    The most popular route from Washington, D.C. to Kos is Washington, D.C. Dulles Intl - Kos. You may also consider Washington, D.C. Reagan-National - Kos or Baltimore/Washington - Kos.

  • Can I find deals for flights from Washington, D.C. to Kos that include hotel bookings?

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

  • How can I find direct flights from Washington, D.C. to Kos?

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

  • Can I find deals for business class flights from Washington, D.C. to Kos?

    Yes. Cheapflights offers flight deals from Washington, D.C. 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.