HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Kos

$397+ Cheap flights from Washington, D.C. (WAS) 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 7/15. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — KGS
May 6 — May 131
Tue 5/6
Tue 5/13
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.

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 May 1, 2025.

Round-trip from

$1,106
(Mytrip)

One-way from

$397
(Kiwi.com)
From Washington, D.C. (WAS) to Kos
Search Deals
One-way flight from Washington, D.C. (WAS) to Kos
Search Deals

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 May 1, 2025.

This Gurufare deal was found by Cheapflights users on 4/30. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1910:20 pmIAD - KGS
1 stop13h 45mMultiple Airlines
Mon 8/2511:00 amKGS - IAD
1 stop36h 15mMultiple Airlines
Deal found 4/30$1,086
This SWISS deal was found by Cheapflights users on 4/30. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/188:45 pmIAD - KGS
1 stop15h 55mSWISS
Mon 8/2511:00 amKGS - IAD
1 stop36h 15mSWISS
Deal found 4/30$1,098
This Lufthansa deal was found by Cheapflights users on 4/30. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1910:20 pmIAD - KGS
1 stop13h 45mLufthansa
Mon 8/2512:40 pmKGS - IAD
2 stops39h 39mLufthansa
Deal found 4/30$1,124
This Austrian Airlines deal was found by Cheapflights users on 4/30. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/185:10 pmIAD - KGS
2 stops44h 40mAustrian Airlines
Mon 8/258:50 pmKGS - IAD
1 stop24h 45mAustrian Airlines
Deal found 4/30$1,126
This Mytrip deal was found by Cheapflights users on 5/1. 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 6/156:50 pmBWI - KGS
2 stops18h 10mMultiple Airlines
Sun 6/227:15 pmKGS - BWI
2 stops29h 25mMultiple Airlines
Deal found 5/1$1,259
This British Airways deal was found by Cheapflights users on 4/30. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/192:59 pmDCA - KGS
2 stops22h 46mBritish Airways
Mon 8/2510:00 pmKGS - DCA
2 stops32h 17mBritish Airways
Deal found 4/30$1,495
This Booking.com deal was found by Cheapflights users on 5/1. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/154:35 pmDCA - KGS
2 stops16h 10mMultiple Airlines
Sun 6/2210:25 pmKGS - DCA
2 stops30h 23mMultiple Airlines
Deal found 5/1$1,537

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 May 1, 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

Tue 8/19

10:20 pm-7:05 pm

1 stop13h 45m

Kos

Mon 8/25

11:00 am-4:15 pm

1 stop36h 15m

$1,086

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Mon 8/18

8:45 pm-7:40 pm

1 stop15h 55m

Kos

Mon 8/25

11:00 am-4:15 pm

1 stop36h 15m

$1,098

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Tue 8/19

10:20 pm-7:05 pm

1 stop13h 45m

Kos

Mon 8/25

12:40 pm-9:19 pm

2 stops39h 39m

$1,124

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Mon 8/18

5:10 pm-8:50 pm

2 stops44h 40m

Kos

Mon 8/25

8:50 pm-2:35 pm

1 stop24h 45m

$1,126

BaltimoreKos

BWI - KGS

BWIKGS

Baltimore/Washington

Sun 6/15

6:50 pm-8:00 pm

2 stops18h 10m

Kos

Sun 6/22

7:15 pm-5:40 pm

2 stops29h 25m

$1,259

Washington, D.C.Kos

DCA - KGS

DCAKGS

Washington, D.C. Reagan-National

Tue 8/19

2:59 pm-8:45 pm

2 stops22h 46m

Kos

Mon 8/25

10:00 pm-11:17 pm

2 stops32h 17m

$1,495

Washington, D.C.Kos

DCA - KGS

DCAKGS

Washington, D.C. Reagan-National

Sun 6/15

4:35 pm-3:45 pm

2 stops16h 10m

Kos

Sun 6/22

10:25 pm-9:48 pm

2 stops30h 23m

$1,537

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Tue 7/15

10:20 pm-9:45 pm

2 stops16h 25m

$397

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Tue 7/15

10:20 pm-7:05 pm

1 stop13h 45m

$769

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Tue 7/15

8:45 pm-7:55 pm

1 stop16h 10m

$771

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

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

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 May 1, 2025.
SWISS
7.5
Good
1,588 reviews

Overall

7.5

Crew

8.2

Comfort

7.4

Food

7.0

Entertainment

6.7

Boarding

7.6

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
1,588 reviews
SWISS
7.5
Good
1,588 reviews

Overall

7.5

Crew

8.2

Comfort

7.4

Food

7.0

Entertainment

6.7

Boarding

7.6

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
7,045 reviews
SWISS
7.5
Good
1,588 reviews

Overall

7.5

Crew

8.2

Comfort

7.4

Food

7.0

Entertainment

6.7

Boarding

7.6

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.
British Airways
6.6
Okay
6,845 reviews
SWISS
7.5
Good
1,588 reviews

Overall

7.5

Crew

8.2

Comfort

7.4

Food

7.0

Entertainment

6.7

Boarding

7.6

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, 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.
Site
Privacy Preferences©2025 Cheapflights