Cheap flights from Washington, D.C. Dulles Intl Airport to Kos from $834

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to Kos departing on 2/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.

Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Kos

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
5:40 pm - 4:10 pm
IAD
-
KGS
15h 30m2 stops
Multiple Airlines Logo
8:35 pm - 5:40 pm
KGS
-
IAD
27h 05m2 stops
$834Multiple Airlines
Mon, Feb 23 - Mon, Mar 9
Multiple Airlines Logo
5:40 pm - 4:10 pm
IAD
-
KGS
15h 30m2 stops
Multiple Airlines Logo
8:35 pm - 3:50 pm
KGS
-
IAD
26h 15m2 stops
$881Multiple Airlines
Mon, Feb 23 - Sat, Mar 7
Multiple Airlines Logo
5:40 pm - 5:05 pm
IAD
-
KGS
16h 25m2 stops
Multiple Airlines Logo
8:35 pm - 3:25 pm
KGS
-
IAD
24h 50m2 stops
$884Multiple Airlines
Sat, Feb 21 - Mon, Mar 9
Multiple Airlines Logo
6:00 pm - 4:10 pm
IAD
-
KGS
15h 10m2 stops
Multiple Airlines Logo
8:35 pm - 3:25 pm
KGS
-
IAD
24h 50m2 stops
$920Multiple Airlines
Sun, Feb 22 - Mon, Mar 9
Multiple Airlines Logo
5:40 pm - 5:05 pm
IAD
-
KGS
16h 25m2 stops
Multiple Airlines Logo
9:05 pm - 4:50 pm
KGS
-
IAD
25h 45m2 stops
$931Multiple Airlines
Sat, Feb 21 - Sun, Mar 8
Multiple Airlines Logo
5:40 pm - 5:05 pm
IAD
-
KGS
16h 25m2 stops
Multiple Airlines Logo
8:35 pm - 2:25 pm
KGS
-
IAD
24h 50m2 stops
$934Multiple Airlines
Sat, Feb 21 - Sat, Mar 7
Multiple Airlines Logo
6:00 pm - 4:10 pm
IAD
-
KGS
15h 10m2 stops
Multiple Airlines Logo
9:05 pm - 4:50 pm
KGS
-
IAD
25h 45m2 stops
$968Multiple Airlines
Sun, Feb 22 - Sun, Mar 8
Multiple Airlines Logo
6:00 pm - 4:10 pm
IAD
-
KGS
15h 10m2 stops
Multiple Airlines Logo
8:35 pm - 2:25 pm
KGS
-
IAD
24h 50m2 stops
$970Multiple Airlines
Sun, Feb 22 - Sat, Mar 7
Emirates Logo
10:30 am - 5:05 pm
IAD
-
KGS
23h 35m2 stops
Emirates Logo
12:35 pm - 9:00 am
KGS
-
IAD
26h 25m2 stops
$1,757Emirates
Sat, Feb 21 - Tue, Mar 10
Emirates Logo
10:30 am - 5:05 pm
IAD
-
KGS
23h 35m2 stops
Emirates Logo
12:35 pm - 9:00 am
KGS
-
IAD
26h 25m2 stops
$1,800Emirates
Thu, Feb 19 - Tue, Mar 10

Emirates flights from Washington, D.C. Dulles Intl Airport to Kos

Our best Emirates deals on Washington, D.C. Dulles Intl Airport to Kos flight tickets
Emirates
Feb 21
IAD10:30 amWashington, D.C. Dulles Intl
23h 35m
2 stops
KGS5:05 pmKos
Mar 11
KGS12:35 pmKos
26h 25m
2 stops
IAD9:00 amWashington, D.C. Dulles Intl
Emirates
Feb 19
IAD10:30 amWashington, D.C. Dulles Intl
23h 35m
2 stops
KGS5:05 pmKos
Mar 9
KGS12:35 pmKos
26h 25m
2 stops
IAD9:00 amWashington, D.C. Dulles Intl
Emirates
Feb 12
IAD10:30 amWashington, D.C. Dulles Intl
23h 35m
2 stops
KGS5:05 pmKos
Feb 16
KGS12:35 pmKos
26h 35m
2 stops
IAD8:10 amWashington, D.C. Dulles Intl

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport 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, momondo users made 832,500 searches. Data last updated December 4, 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

Fly to

Route

Depart

Return

Price

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Mon 2/23

5:40 pm-4:10 pm

2 stops15h 30m

Kos

Mon 3/9

8:35 pm-5:40 pm

2 stops27h 05m

$834

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Mon 2/23

5:40 pm-4:10 pm

2 stops15h 30m

Kos

Sat 3/7

8:35 pm-3:50 pm

2 stops26h 15m

$881

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Sat 2/21

5:40 pm-5:05 pm

2 stops16h 25m

Kos

Mon 3/9

8:35 pm-3:25 pm

2 stops24h 50m

$884

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Sun 2/22

6:00 pm-4:10 pm

2 stops15h 10m

Kos

Mon 3/9

8:35 pm-3:25 pm

2 stops24h 50m

$920

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Sat 2/21

5:40 pm-5:05 pm

2 stops16h 25m

Kos

Sun 3/8

9:05 pm-4:50 pm

2 stops25h 45m

$931

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Sat 2/21

5:40 pm-5:05 pm

2 stops16h 25m

Kos

Sat 3/7

8:35 pm-2:25 pm

2 stops24h 50m

$934

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Sun 2/22

6:00 pm-4:10 pm

2 stops15h 10m

Kos

Sun 3/8

9:05 pm-4:50 pm

2 stops25h 45m

$968

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Sun 2/22

6:00 pm-4:10 pm

2 stops15h 10m

Kos

Sat 3/7

8:35 pm-2:25 pm

2 stops24h 50m

$970

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Sat 2/21

10:30 am-5:05 pm

2 stops23h 35m

Kos

Tue 3/10

12:35 pm-9:00 am

2 stops26h 25m

$1,757

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Thu 2/19

10:30 am-5:05 pm

2 stops23h 35m

Kos

Tue 3/10

12:35 pm-9:00 am

2 stops26h 25m

$1,800

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Kos from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Kos

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Kos?

The cheapest day to depart from Washington, D.C. Dulles Intl Airport to Kos is on a Tuesday when prices can be found for as low as $1,026. On the other hand, Sunday is the most expensive day to depart from Washington, D.C. Dulles Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,792.

What is the cheapest time of day to depart on your flight to Kos?

Flying to Kos from Washington, D.C. Dulles Intl Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $1,310 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,792 on average. Flights to Kos from Washington, D.C. Dulles Intl Airport in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from Washington, D.C. Dulles Intl Airport to Kos

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to Kos according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Dulles Intl Airport to Kos (IAD to KGS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Kos

Fastest flight time

15h 55m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Kos takes 15h 55m
There are no direct flights from Washington, D.C. Dulles Intl Airport to Kos. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to Kos.
  • How far is Washington, D.C. Dulles Intl to Kos by plane?

    Kos is 5340.0 mi away from Washington, D.C. Dulles Intl. Flights usually cover this in 15h 10m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Kos Airport?

    Prices for flights from Washington, D.C. Dulles Intl Airport to Kos Airport were last updated today.

  • How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Kos Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Kos Airport.

  • What documentation or ID do you need to fly to Kos Airport?

    The travel and health documents you'll need for your trip to Kos Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Kos Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Traveling to a place near Kos?

Book flights to Kos if you plan to visit one of these locations
Kardamena
Marmari

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Kos?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Kos from Washington, D.C..

Can I find flights from Washington, D.C. to Kos with flexible booking policies on momondo?

Flights from Washington, D.C. to Kos with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Washington, D.C. to Kos?

Once you have performed a search for Washington, D.C. to Kos flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Washington, D.C. to Kos right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Kos, momondo offers a useful price alert feature which will track prices for flights to Kos from Washington, D.C. and alert you when they change.

An easier way to manage your Kos trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 1/3
Sat 1/10

Find better results for your trip to Greece