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Cheap flights from Washington, D.C. to Kos from $236

This is the cheapest one-way 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 8/29. 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
1 adult, Economy, 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.
SWISS Logo
8:20 pm - 7:40 pm
IAD
-
KGS
16h 20m
1 stop
SWISS Logo
11:00 am - 4:45 pm
KGS
-
IAD
36h 45m
1 stop
$913SWISS
Mon, Aug 24 - Mon, Aug 31
Multiple Airlines Logo
5:35 pm - 10:15 am
IAD
-
KGS
33h 40m
1 stop
Multiple Airlines Logo
9:45 am - 7:25 pm
KGS
-
IAD
40h 40m
2 stops
$967Multiple Airlines
Mon, Aug 24 - Mon, Aug 31
Multiple Airlines Logo
8:30 pm - 9:05 pm
IAD
-
KGS
17h 35m
2 stops
Multiple Airlines Logo
11:15 am - 3:10 pm
KGS
-
IAD
34h 55m
2 stops
$1,065Multiple Airlines
Mon, Aug 24 - Mon, Aug 31
Multiple Airlines Logo
5:45 pm - 8:00 pm
IAD
-
KGS
19h 15m
1 stop
Multiple Airlines Logo
11:25 am - 1:30 pm
KGS
-
IAD
33h 05m
1 stop
$1,095Multiple Airlines
Sun, Sep 6 - Sun, Sep 13
Multiple Airlines Logo
8:30 pm - 9:05 pm
IAD
-
KGS
17h 35m
2 stops
Multiple Airlines Logo
6:10 pm - 3:10 pm
KGS
-
IAD
28h 00m
3 stops
$1,102Multiple Airlines
Mon, Aug 24 - Mon, Aug 31
Multiple Airlines Logo
9:45 am - 10:35 pm
IAD
-
KGS
29h 50m
2 stops
Multiple Airlines Logo
11:05 pm - 9:24 pm
KGS
-
IAD
29h 19m
2 stops
$1,179Multiple Airlines
Sun, Sep 6 - Sun, Sep 13
Multiple Airlines Logo
4:20 pm - 10:35 pm
DCA
-
KGS
23h 15m
2 stops
Multiple Airlines Logo
11:05 pm - 12:14 pm
KGS
-
DCA
44h 09m
3 stops
$1,194Multiple Airlines
Sun, Sep 6 - Sun, Sep 13
Multiple Airlines Logo
9:45 am - 10:35 pm
IAD
-
KGS
29h 50m
2 stops
Multiple Airlines Logo
6:10 pm - 7:00 pm
KGS
-
IAD
31h 50m
3 stops
$1,208Multiple Airlines
Sun, Sep 6 - Sun, Sep 13
British Airways Logo
8:42 pm - 8:55 pm
DCA
-
KGS
41h 13m
2 stops
British Airways Logo
9:45 pm - 8:59 pm
KGS
-
DCA
30h 14m
2 stops
$1,375British Airways
Mon, Aug 24 - Mon, Aug 31
Emirates Logo
10:55 am - 5:30 pm
IAD
-
KGS
47h 35m
2 stops
Emirates Logo
6:10 pm - 8:40 am
KGS
-
IAD
45h 30m
2 stops
$1,864Emirates
Mon, Aug 31 - Fri, Sep 4

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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
Aug 24
IAD8:20 pmWashington, D.C. Dulles Intl
16h 20m
1 stop
KGS7:40 pmKos
Aug 31
KGS11:00 amKos
36h 45m
1 stop
IAD4:45 pmWashington, D.C. Dulles Intl
$913
SWISS
Jul 31
IAD5:40 pmWashington, D.C. Dulles Intl
19h 20m
2 stops
KGS8:00 pmKos
Aug 13
KGS11:00 amKos
34h 00m
2 stops
IAD2:00 pmWashington, D.C. Dulles Intl
$2,259

Emirates flights from Washington, D.C. to Kos

Our best Emirates deals on Washington, D.C. to Kos flight tickets
Emirates
Aug 31
IAD10:55 amWashington, D.C. Dulles Intl
47h 35m
2 stops
KGS5:30 pmKos
Sep 4
KGS6:10 pmKos
45h 30m
2 stops
IAD8:40 amWashington, D.C. Dulles Intl
$1,864
Emirates
Aug 31
IAD10:55 amWashington, D.C. Dulles Intl
47h 35m
2 stops
KGS5:30 pmKos
Sep 4
KGS6:10 pmKos
45h 30m
2 stops
IAD8:40 amWashington, D.C. Dulles Intl
$1,928

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 July 24, 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

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Mon 8/24

8:20 pm-7:40 pm

1 stop16h 20m

Kos

Mon 8/31

11:00 am-4:45 pm

1 stop36h 45m

$913

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Mon 8/24

5:35 pm-10:15 am

1 stop33h 40m

Kos

Mon 8/31

9:45 am-7:25 pm

2 stops40h 40m

$967

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Mon 8/24

8:30 pm-9:05 pm

2 stops17h 35m

Kos

Mon 8/31

11:15 am-3:10 pm

2 stops34h 55m

$1,065

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Sun 9/6

5:45 pm-8:00 pm

1 stop19h 15m

Kos

Sun 9/13

11:25 am-1:30 pm

1 stop33h 05m

$1,095
Quickest round-trip

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Mon 8/24

8:30 pm-9:05 pm

2 stops17h 35m

Kos

Mon 8/31

6:10 pm-3:10 pm

3 stops28h 00m

$1,102

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Sun 9/6

9:45 am-10:35 pm

2 stops29h 50m

Kos

Sun 9/13

11:05 pm-9:24 pm

2 stops29h 19m

$1,179

Washington, D.C.Kos

DCA - KGS

DCAKGS

Washington, D.C. Reagan-National

Sun 9/6

4:20 pm-10:35 pm

2 stops23h 15m

Kos

Sun 9/13

11:05 pm-12:14 pm

3 stops44h 09m

$1,194

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Sun 9/6

9:45 am-10:35 pm

2 stops29h 50m

Kos

Sun 9/13

6:10 pm-7:00 pm

3 stops31h 50m

$1,208

Washington, D.C.Kos

DCA - KGS

DCAKGS

Washington, D.C. Reagan-National

Mon 8/24

8:42 pm-8:55 pm

2 stops41h 13m

Kos

Mon 8/31

9:45 pm-8:59 pm

2 stops30h 14m

$1,375

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Mon 8/31

10:55 am-5:30 pm

2 stops47h 35m

Kos

Fri 9/4

6:10 pm-8:40 am

2 stops45h 30m

$1,864

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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

What is the cheapest airline that flies from Washington, D.C. to Kos?

British Airways is the most popular carrier operating from Washington, D.C. to Kos

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 30m

Direct flights

None
The fastest flight from Washington, D.C. to Kos takes 16h 30m
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 30m 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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