Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Washington, D.C. to Kos from $1,199

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. to Kos departing on 3/31. 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.
Search flight deals

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

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:45 pm - 12:35 am
IAD
-
KGS
19h 50m
2 stops
Multiple Airlines Logo
6:05 pm - 11:35 am
KGS
-
IAD
24h 30m
2 stops
$1,199Multiple Airlines
Tue, Mar 31 - Tue, Apr 7
Multiple Airlines Logo
4:30 pm - 12:35 am
IAD
-
KGS
25h 05m
3 stops
Multiple Airlines Logo
6:05 pm - 8:35 pm
KGS
-
IAD
33h 30m
3 stops
$1,261Multiple Airlines
Tue, Mar 31 - Tue, Apr 7
Multiple Airlines Logo
9:45 pm - 12:35 am
IAD
-
KGS
19h 50m
2 stops
Multiple Airlines Logo
5:25 pm - 11:35 am
KGS
-
IAD
25h 10m
3 stops
$1,299Multiple Airlines
Tue, Mar 31 - Tue, Apr 7
Multiple Airlines Logo
8:30 pm - 10:20 am
BWI
-
KGS
30h 50m
3 stops
Multiple Airlines Logo
8:35 am - 10:15 pm
KGS
-
BWI
20h 40m
3 stops
$1,310Multiple Airlines
Tue, Mar 31 - Tue, Apr 7
Multiple Airlines Logo
3:25 pm - 12:35 am
IAD
-
KGS
26h 10m
3 stops
Multiple Airlines Logo
5:00 pm - 3:45 pm
KGS
-
IAD
29h 45m
2 stops
$1,346Multiple Airlines
Wed, Jul 8 - Sun, Aug 2
Multiple Airlines Logo
8:20 pm - 10:20 am
IAD
-
KGS
31h 00m
1 stop
Multiple Airlines Logo
9:20 am - 7:25 pm
KGS
-
IAD
17h 05m
2 stops
$1,373Multiple Airlines
Tue, Mar 31 - Tue, Apr 7
Multiple Airlines Logo
3:25 pm - 12:35 am
IAD
-
KGS
26h 10m
3 stops
Multiple Airlines Logo
12:35 pm - 3:45 pm
KGS
-
IAD
34h 10m
3 stops
$1,374Multiple Airlines
Wed, Jul 8 - Sun, Aug 2
SWISS Logo
10:10 pm - 10:20 am
IAD
-
KGS
53h 10m
2 stops
SWISS Logo
7:35 pm - 4:45 pm
KGS
-
IAD
28h 10m
2 stops
$1,380SWISS
Mon, Mar 30 - Mon, Apr 6
SWISS Logo
10:10 pm - 10:20 am
IAD
-
KGS
53h 10m
2 stops
SWISS Logo
7:35 pm - 3:30 pm
KGS
-
IAD
50h 55m
3 stops
$1,410SWISS
Mon, Mar 30 - Mon, Apr 6
Multiple Airlines Logo
10:20 pm - 12:35 am
IAD
-
KGS
19h 15m
2 stops
Multiple Airlines Logo
9:20 am - 7:25 pm
KGS
-
IAD
17h 05m
2 stops
$1,430Multiple Airlines
Wed, Apr 1 - Wed, Apr 8

SWISS flights from Washington, D.C. to Kos

Our best SWISS deals on Washington, D.C. to Kos flight tickets
SWISS
Mar 30
IAD10:10 pmWashington, D.C. Dulles Intl
53h 10m
2 stops
KGS10:20 amKos
Apr 6
KGS7:35 pmKos
28h 10m
2 stops
IAD4:45 pmWashington, D.C. Dulles Intl
$1,380
SWISS
Mar 30
IAD10:10 pmWashington, D.C. Dulles Intl
53h 10m
2 stops
KGS10:20 amKos
Apr 6
KGS7:35 pmKos
50h 55m
3 stops
IAD3:30 pmWashington, D.C. Dulles Intl
$1,410

Emirates flights from Washington, D.C. to Kos

Our best Emirates deals on Washington, D.C. to Kos flight tickets
Emirates
Mar 22
IAD11:15 amWashington, D.C. Dulles Intl
22h 55m
2 stops
KGS4:10 pmKos
Mar 26
KGS12:35 pmKos
26h 25m
2 stops
IAD9:00 amWashington, D.C. Dulles Intl
$2,019
Emirates
Mar 22
IAD11:15 amWashington, D.C. Dulles Intl
22h 55m
2 stops
KGS4:10 pmKos
Mar 26
KGS12:35 pmKos
26h 25m
2 stops
IAD9:00 amWashington, D.C. Dulles Intl
$2,842

momondo 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, momondo users made 832,500 searches. Data last updated February 17, 2026.
Use the filters below to find and compare flights from Washington, D.C. 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

Tue 3/31

9:45 pm-12:35 am

2 stops19h 50m

Kos

Tue 4/7

6:05 pm-11:35 am

2 stops24h 30m

$1,199

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Tue 3/31

4:30 pm-12:35 am

3 stops25h 05m

Kos

Tue 4/7

6:05 pm-8:35 pm

3 stops33h 30m

$1,261

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Tue 3/31

9:45 pm-12:35 am

2 stops19h 50m

Kos

Tue 4/7

5:25 pm-11:35 am

3 stops25h 10m

$1,299

BaltimoreKos

BWI - KGS

BWIKGS

Baltimore/Washington

Tue 3/31

8:30 pm-10:20 am

3 stops30h 50m

Kos

Tue 4/7

8:35 am-10:15 pm

3 stops20h 40m

$1,310

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Wed 7/8

3:25 pm-12:35 am

3 stops26h 10m

Kos

Sun 8/2

5:00 pm-3:45 pm

2 stops29h 45m

$1,346

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Tue 3/31

8:20 pm-10:20 am

1 stop31h 00m

Kos

Tue 4/7

9:20 am-7:25 pm

2 stops17h 05m

$1,373

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Wed 7/8

3:25 pm-12:35 am

3 stops26h 10m

Kos

Sun 8/2

12:35 pm-3:45 pm

3 stops34h 10m

$1,374

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Mon 3/30

10:10 pm-10:20 am

2 stops53h 10m

Kos

Mon 4/6

7:35 pm-4:45 pm

2 stops28h 10m

$1,380

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Mon 3/30

10:10 pm-10:20 am

2 stops53h 10m

Kos

Mon 4/6

7:35 pm-3:30 pm

3 stops50h 55m

$1,410

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Wed 4/1

10:20 pm-12:35 am

2 stops19h 15m

Kos

Wed 4/8

9:20 am-7:25 pm

2 stops17h 05m

$1,430

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. 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

How long does it take to fly to Kos?

On average, it takes 17h 57m to fly from Washington, D.C. to Kos if you fly out of Washington, D.C. (the most popular airport in Washington, D.C.) and into Kos (the most popular airport in Kos). If you’re flying out of Baltimore and into Kos, then the flight time is around 30h 50m.

When to book flights from Washington, D.C. to Kos

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. 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. to Kos (WAS to KGS) flight deals and tips

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

Fastest flight time

16h 40m

Direct flights

None
The fastest flight from Washington, D.C. to Kos takes 16h 40m
There are no direct flights from Washington, D.C. to Kos. There are no popular flight routes from Washington, D.C. to Kos.
Search flight deals

  • How far is Washington, D.C. to Kos by plane?

    A flight from Washington, D.C. to Kos will travel around 5324.1 mi. Typically, this will take 16h 40m by plane in normal conditions.

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

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

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

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

    The required travel and health documents for your Kos Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Kos Airport. We recommend that you seek guidance from your airline or a reliable 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?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington, D.C. to Kos. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo enables you to select and highlight flights to Kos from Washington, D.C. with this policy.

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

momondo helps you find the best flight between Washington, D.C. and Kos by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes. momondo can track prices for Washington, D.C. to Kos flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 3/19
Thu 3/26
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Greece