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Cheap flights from Washington, D.C. to Kos from $1,088

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 6/5. 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

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
6:00 am - 8:30 pm
DCA
-
KGS
31h 30m
3 stops
Multiple Airlines Logo
10:25 pm - 10:28 pm
KGS
-
DCA
31h 03m
2 stops
$1,088Multiple Airlines
Fri, Jun 5 - Fri, Jun 12
Multiple Airlines Logo
6:00 am - 8:30 pm
DCA
-
KGS
31h 30m
3 stops
Multiple Airlines Logo
10:25 pm - 10:28 pm
KGS
-
DCA
31h 03m
3 stops
$1,089Multiple Airlines
Fri, Jun 5 - Fri, Jun 12
Multiple Airlines Logo
6:59 am - 8:30 pm
DCA
-
KGS
30h 31m
2 stops
Multiple Airlines Logo
10:25 pm - 10:28 pm
KGS
-
DCA
31h 03m
2 stops
$1,159Multiple Airlines
Fri, Jun 5 - Fri, Jun 12
Multiple Airlines Logo
10:55 pm - 12:35 pm
IAD
-
KGS
54h 40m
3 stops
Multiple Airlines Logo
5:15 pm - 3:45 pm
KGS
-
IAD
29h 30m
2 stops
$1,170Multiple Airlines
Thu, Jun 4 - Thu, Jun 11
Multiple Airlines Logo
3:45 pm - 8:30 pm
IAD
-
KGS
21h 45m
3 stops
Multiple Airlines Logo
10:25 pm - 8:40 pm
KGS
-
IAD
29h 15m
3 stops
$1,192Multiple Airlines
Fri, Jun 5 - Fri, Jun 12
Multiple Airlines Logo
8:18 am - 10:15 pm
IAD
-
KGS
30h 57m
3 stops
Multiple Airlines Logo
5:15 pm - 8:29 pm
KGS
-
IAD
34h 14m
3 stops
$1,208Multiple Airlines
Thu, Jun 4 - Thu, Jun 11
Multiple Airlines Logo
8:30 pm - 8:50 am
BWI
-
KGS
29h 20m
3 stops
Multiple Airlines Logo
8:35 am - 10:15 pm
KGS
-
BWI
20h 40m
3 stops
$1,218Multiple Airlines
Tue, Jun 2 - Tue, Jun 9
Multiple Airlines Logo
8:30 pm - 12:35 am
BWI
-
KGS
21h 05m
3 stops
Multiple Airlines Logo
8:35 am - 10:15 pm
KGS
-
BWI
20h 40m
3 stops
$1,237Multiple Airlines
Thu, Jun 4 - Thu, Jun 11
Multiple Airlines Logo
3:45 pm - 8:30 pm
IAD
-
KGS
21h 45m
3 stops
Multiple Airlines Logo
11:40 am - 10:15 pm
KGS
-
IAD
17h 35m
2 stops
$1,241Multiple Airlines
Fri, Jun 5 - Fri, Jun 12
Multiple Airlines Logo
8:45 pm - 10:00 pm
IAD
-
KGS
18h 15m
1 stop
Multiple Airlines Logo
5:15 pm - 3:45 pm
KGS
-
IAD
29h 30m
2 stops
$1,249Multiple Airlines
Thu, Jul 23 - Thu, Jul 30

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SWISS flights from Washington, D.C. to Kos

Our best SWISS deals on Washington, D.C. to Kos flight tickets
SWISS
Jul 27
IAD8:20 pmWashington, D.C. Dulles Intl
16h 20m
1 stop
KGS7:40 pmKos
Aug 3
KGS11:00 amKos
36h 45m
1 stop
IAD4:45 pmWashington, D.C. Dulles Intl
$1,476
SWISS
Jul 24
IAD8:20 pmWashington, D.C. Dulles Intl
16h 40m
1 stop
KGS8:00 pmKos
Aug 3
KGS11:00 amKos
36h 45m
1 stop
IAD4:45 pmWashington, D.C. Dulles Intl
$1,536
SWISS
Jul 27
IAD8:20 pmWashington, D.C. Dulles Intl
16h 20m
1 stop
KGS7:40 pmKos
Aug 2
KGS3:15 pmKos
32h 30m
1 stop
IAD4:45 pmWashington, D.C. Dulles Intl
$1,546

Austrian Airlines flights from Washington, D.C. to Kos

Our best Austrian Airlines deals on Washington, D.C. to Kos flight tickets
Austrian Airlines
Jul 22
IAD5:25 pmWashington, D.C. Dulles Intl
19h 55m
1 stop
KGS8:20 pmKos
Jul 30
KGS9:10 pmKos
24h 25m
1 stop
IAD2:35 pmWashington, D.C. Dulles Intl
$1,508
Austrian Airlines
Jul 22
IAD5:25 pmWashington, D.C. Dulles Intl
19h 55m
1 stop
KGS8:20 pmKos
Aug 3
KGS8:50 pmKos
24h 45m
1 stop
IAD2:35 pmWashington, D.C. Dulles Intl
$1,548
Austrian Airlines
Jul 22
IAD5:25 pmWashington, D.C. Dulles Intl
19h 55m
1 stop
KGS8:20 pmKos
Jul 31
KGS9:40 pmKos
23h 55m
1 stop
IAD2:35 pmWashington, D.C. Dulles Intl
$1,578

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 April 22, 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

Cheapest round-trip

Washington, D.C.Kos

DCA - KGS

DCAKGS

Washington, D.C. Reagan-National

Fri 6/5

6:00 am-8:30 pm

3 stops31h 30m

Kos

Fri 6/12

10:25 pm-10:28 pm

2 stops31h 03m

$1,088

Washington, D.C.Kos

DCA - KGS

DCAKGS

Washington, D.C. Reagan-National

Fri 6/5

6:00 am-8:30 pm

3 stops31h 30m

Kos

Fri 6/12

10:25 pm-10:28 pm

3 stops31h 03m

$1,089

Washington, D.C.Kos

DCA - KGS

DCAKGS

Washington, D.C. Reagan-National

Fri 6/5

6:59 am-8:30 pm

2 stops30h 31m

Kos

Fri 6/12

10:25 pm-10:28 pm

2 stops31h 03m

$1,159

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Thu 6/4

10:55 pm-12:35 pm

3 stops54h 40m

Kos

Thu 6/11

5:15 pm-3:45 pm

2 stops29h 30m

$1,170

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Fri 6/5

3:45 pm-8:30 pm

3 stops21h 45m

Kos

Fri 6/12

10:25 pm-8:40 pm

3 stops29h 15m

$1,192

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Thu 6/4

8:18 am-10:15 pm

3 stops30h 57m

Kos

Thu 6/11

5:15 pm-8:29 pm

3 stops34h 14m

$1,208

BaltimoreKos

BWI - KGS

BWIKGS

Baltimore/Washington

Tue 6/2

8:30 pm-8:50 am

3 stops29h 20m

Kos

Tue 6/9

8:35 am-10:15 pm

3 stops20h 40m

$1,218

BaltimoreKos

BWI - KGS

BWIKGS

Baltimore/Washington

Thu 6/4

8:30 pm-12:35 am

3 stops21h 05m

Kos

Thu 6/11

8:35 am-10:15 pm

3 stops20h 40m

$1,237
Quickest round-trip

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Fri 6/5

3:45 pm-8:30 pm

3 stops21h 45m

Kos

Fri 6/12

11:40 am-10:15 pm

2 stops17h 35m

$1,241

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Thu 7/23

8:45 pm-10:00 pm

1 stop18h 15m

Kos

Thu 7/30

5:15 pm-3:45 pm

2 stops29h 30m

$1,249

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 16h 25m 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 21h 05m.

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 15m

Direct flights

None
The fastest flight from Washington, D.C. to Kos takes 16h 15m
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

Frequently asked questions about flying from Washington, D.C. to Kos

  • 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 15m 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.

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