Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Washington, D.C. Reagan-National Airport to Kos from $770

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. Reagan-National Airport to Kos departing on 7/15. 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

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. Reagan-National Airport to Kos

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
4:20 pm - 7:05 pm
DCA
-
KGS
19h 45m
2 stops
Multiple Airlines Logo
9:40 am - 9:50 pm
KGS
-
DCA
19h 10m
2 stops
$1,363Multiple Airlines
Tue, Sep 8 - Sat, Sep 19
Multiple Airlines Logo
8:40 pm - 12:35 am
DCA
-
KGS
20h 55m
3 stops
Multiple Airlines Logo
10:05 pm - 3:39 pm
KGS
-
DCA
24h 34m
2 stops
$1,577Multiple Airlines
Mon, Apr 6 - Thu, Apr 30
Multiple Airlines Logo
11:00 am - 12:35 am
DCA
-
KGS
30h 35m
2 stops
Multiple Airlines Logo
9:20 am - 9:55 pm
KGS
-
DCA
19h 35m
2 stops
$1,744Multiple Airlines
Wed, May 6 - Wed, May 13
Multiple Airlines Logo
11:00 am - 12:35 am
DCA
-
KGS
30h 35m
2 stops
Multiple Airlines Logo
6:00 am - 9:55 pm
KGS
-
DCA
22h 55m
2 stops
$1,879Multiple Airlines
Sun, May 3 - Sun, May 10
Multiple Airlines Logo
9:40 am - 12:35 am
DCA
-
KGS
31h 55m
2 stops
Multiple Airlines Logo
9:20 am - 9:55 pm
KGS
-
DCA
19h 35m
2 stops
$2,449Multiple Airlines
Mon, Apr 6 - Thu, Apr 30
Multiple Airlines Logo
4:20 pm - 5:30 pm
DCA
-
KGS
18h 10m
3 stops
Multiple Airlines Logo
1:05 pm - 10:34 pm
KGS
-
DCA
16h 29m
2 stops
$2,495Multiple Airlines
Tue, Sep 8 - Sat, Sep 19

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Reagan-National 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 March 23, 2026.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport 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

Tue 9/8

4:20 pm-7:05 pm

2 stops19h 45m

Kos

Sat 9/19

9:40 am-9:50 pm

2 stops19h 10m

$1,363

Washington, D.C.Kos

DCA - KGS

DCAKGS

Washington, D.C. Reagan-National

Mon 4/6

8:40 pm-12:35 am

3 stops20h 55m

Kos

Thu 4/30

10:05 pm-3:39 pm

2 stops24h 34m

$1,577

Washington, D.C.Kos

DCA - KGS

DCAKGS

Washington, D.C. Reagan-National

Wed 5/6

11:00 am-12:35 am

2 stops30h 35m

Kos

Wed 5/13

9:20 am-9:55 pm

2 stops19h 35m

$1,744

Washington, D.C.Kos

DCA - KGS

DCAKGS

Washington, D.C. Reagan-National

Sun 5/3

11:00 am-12:35 am

2 stops30h 35m

Kos

Sun 5/10

6:00 am-9:55 pm

2 stops22h 55m

$1,879

Washington, D.C.Kos

DCA - KGS

DCAKGS

Washington, D.C. Reagan-National

Mon 4/6

9:40 am-12:35 am

2 stops31h 55m

Kos

Thu 4/30

9:20 am-9:55 pm

2 stops19h 35m

$2,449
Quickest round-trip

Washington, D.C.Kos

DCA - KGS

DCAKGS

Washington, D.C. Reagan-National

Tue 9/8

4:20 pm-5:30 pm

3 stops18h 10m

Kos

Sat 9/19

1:05 pm-10:34 pm

2 stops16h 29m

$2,495
Cheapest one-way
Quickest one-way

Washington, D.C.Kos

DCA - KGS

DCAKGS

Washington, D.C. Reagan-National

Wed 7/15

11:35 am-6:55 pm

2 stops24h 20m

$770

Washington, D.C.Kos

DCA - KGS

DCAKGS

Washington, D.C. Reagan-National

Sun 5/17

11:00 am-8:00 pm

2 stops26h 00m

$874

Washington, D.C.Kos

DCA - KGS

DCAKGS

Washington, D.C. Reagan-National

Tue 6/2

10:23 am-8:45 pm

2 stops27h 22m

$1,395

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. Reagan-National 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 airline that flies from Washington, D.C. Reagan-National to Kos?

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

When to book flights from Washington, D.C. Reagan-National Airport to Kos

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

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

Fastest flight time

20h 55m

Direct flights

None
The fastest flight from Washington, D.C. Reagan-National Airport to Kos takes 20h 55m
There are no direct flights from Washington, D.C. Reagan-National Airport to Kos. There are no popular flight routes from Washington, D.C. Reagan-National Airport to Kos.
Search flight deals

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

    Washington, D.C. Reagan-National and Kos are 5326.5 mi apart from one another. A reasonable flight in good conditions will take 20h 55m.

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

    Prices for flights from Washington, D.C. Reagan-National Airport to Kos Airport are refreshed on a daily basis.

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. Reagan-National 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?

Finding the right flight to Kos from Washington, D.C. is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Kos quick and easy, saving you time and money.

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

Yes. momondo allows you to filter the results for Washington, D.C. to Kos flights to just show those with flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington, D.C. to Kos.

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 not ready to book a flight from Washington, D.C. to Kos now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Kos and let you know 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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 4/22
Wed 4/29
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Greece