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$611+ Cheap flights from Dulles Intl (IAD) 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — KGS
Jul 23 — Jul 301
Wed 7/23
Wed 7/30
1 adult, Economy
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Cheap flight deals from Dulles Intl to Kos

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) 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 July 18, 2025.

Round-trip from

$611
(SWISS)
From Washington, D.C. Dulles Intl to Kos
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Find flight deals from Dulles Intl to Kos

Cheapest flights from Dulles Intl to Kos
Explore the most affordable flight options available from Dulles Intl to Kos. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 18, 2025.

This SWISS deal was found by Cheapflights users on 7/16. 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 7/16$611
This Lufthansa deal was found by Cheapflights users on 7/16. 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 8/193:25 pmIAD - KGS
1 stop14h 15mLufthansa
Mon 8/2512:40 pmKGS - IAD
2 stops39h 39mLufthansa
Deal found 7/16$641
This Lufthansa deal was found by Cheapflights users on 7/17. 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.
Mon 8/188:45 pmIAD - KGS
1 stop15h 55mMultiple Airlines
Mon 8/2512:40 pmKGS - IAD
2 stops31h 50mMultiple Airlines
Deal found 7/17$645
This Emirates deal was found by Cheapflights users on 7/17. 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.
Thu 11/1310:30 amIAD - KGS
2 stops23h 35mEmirates
Mon 11/1712:35 pmKGS - IAD
2 stops26h 35mEmirates
Deal found 7/17$1,776

Cheapflights Fare Finder

Customize your flight search to find flights from Dulles Intl 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 July 18, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Kos that are best for you.

Fly from

Dulles Intl

Fly to

Kos

Route

Depart

Return

Price

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

$611

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Tue 8/19

3:25 pm-12:40 pm

1 stop14h 15m

Kos

Mon 8/25

12:40 pm-9:19 pm

2 stops39h 39m

$641

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

12:40 pm-1:30 pm

2 stops31h 50m

$645

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Thu 11/13

10:30 am-5:05 pm

2 stops23h 35m

Kos

Mon 11/17

12:35 pm-8:10 am

2 stops26h 35m

$1,776

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/17

Best time to book a flight from Dulles Intl to Kos

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

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 July 18, 2025.
Peruse reviews from past customers who have flown with SWISS and Lufthansa from Washington, D.C. Dulles Intl Airport to Kos to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
SWISS
7.5
Good
1,661 reviews

Overall

7.5

Comfort

7.4

Crew

8.2

Food

7.1

Boarding

7.6

Entertainment

6.8

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
1,661 reviews
SWISS
7.5
Good
1,661 reviews

Overall

7.5

Comfort

7.4

Crew

8.2

Food

7.1

Boarding

7.6

Entertainment

6.8

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
6.8
Okay
7,216 reviews
SWISS
7.5
Good
1,661 reviews

Overall

7.5

Comfort

7.4

Crew

8.2

Food

7.1

Boarding

7.6

Entertainment

6.8

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 Dulles Intl 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. Dulles Intl?

    Kos (KGS), located 12.8 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. Dulles Intl to Kos. 0 airlines have flights to Kos from Washington, D.C. Dulles Intl on a regular basis. Booking flights from Washington, D.C. Dulles Intl to Kos should not be difficult; the airport handles an average of 0 inbound flights from Washington, D.C. Dulles Intl per day.

  • Can I find deals for flights from Dulles Intl to Kos that include hotel bookings?

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

  • How can I find direct flights from Dulles Intl to Kos?

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

  • Can I find deals for business class flights from Dulles Intl to Kos?

    Yes. Cheapflights offers flight deals from Dulles Intl 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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