IAD - KGS

$1,000 Find Cheap Flights from Washington, D.C. to Kos - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$1,000
Typical prices: $2,227-$2,615
Multiple Airlines
Wed 10/3Tue 10/16
IAD - KGS • 2 stops
Nonstop flights
Not available
There are currently no direct flights between Washington, D.C. Dulles Intl Airport and Kos. You'll need to take a connecting flight to reach the destination.
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Top layover airports
Frankfurt am Main (FRA)
Cheapest • Avg $2,227 (round-trip)
Athens Eleftherios V. (ATH)
Shortest trip • 13h 35m (one-way)
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Flight Deals

Cheap Flights from Washington, D.C. to Kos (IAD-KGS)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Washington, D.C. to Kos

Mon, Oct 5 - Fri, Oct 16
Multiple Airlines Logo
11:12 am - 8:25 pmIAD  Washington, D.C. Dulles Intl-KGS Kos
26h 13m2 stops Orlando London Gatwick
Multiple Airlines Logo
10:25 pm - 3:45 pmKGS  Kos-IAD Washington, D.C. Dulles Intl
24h 20m1 stop Dublin
$1,000Multiple Airlines
Sat, Oct 3 - Fri, Oct 16
Multiple Airlines Logo
9:33 am - 9:45 pmIAD  Washington, D.C. Dulles Intl-KGS Kos
29h 12m2 stops Orlando London Gatwick
Multiple Airlines Logo
10:25 pm - 3:45 pmKGS  Kos-IAD Washington, D.C. Dulles Intl
24h 20m1 stop Dublin
$1,000Multiple Airlines
Thu, Oct 29 - Thu, Nov 5
Multiple Airlines Logo
8:40 pm - 7:45 amIAD  Washington, D.C. Dulles Intl-KGS Kos
29h 05m3 stops Reykjavik Keflavik Intl Rome Fiumicino Athens Eleftherios V.
Multiple Airlines Logo
8:40 pm - 6:30 pmKGS  Kos-IAD Washington, D.C. Dulles Intl
28h 50m3 stops Athens Eleftherios V. Rome Fiumicino Reykjavik Keflavik Intl
$1,038Multiple Airlines
Thu, Oct 29 - Thu, Nov 5
Multiple Airlines Logo
2:30 pm - 9:15 pmIAD  Washington, D.C. Dulles Intl-KGS Kos
24h 45m2 stops Istanbul Athens Eleftherios V.
Multiple Airlines Logo
8:25 am - 12:45 pmKGS  Kos-IAD Washington, D.C. Dulles Intl
35h 20m2 stops Athens Eleftherios V. Istanbul
$1,055Multiple Airlines
Mon, Oct 26 - Mon, Nov 2
Multiple Airlines Logo
2:30 pm - 9:15 pmIAD  Washington, D.C. Dulles Intl-KGS Kos
24h 45m2 stops Istanbul Athens Eleftherios V.
Multiple Airlines Logo
9:45 pm - 8:25 pmKGS  Kos-IAD Washington, D.C. Dulles Intl
29h 40m2 stops Athens Eleftherios V. Istanbul
$1,058Multiple Airlines
Thu, Oct 8 - Wed, Oct 14
Multiple Airlines Logo
5:15 pm - 10:00 pmIAD  Washington, D.C. Dulles Intl-KGS Kos
21h 45m1 stop Dublin
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2:55 pm - 7:20 pmKGS  Kos-IAD Washington, D.C. Dulles Intl
35h 25m2 stops London Stansted Reykjavik Keflavik Intl
$1,068Multiple Airlines
Thu, Oct 15 - Fri, Oct 23
Multiple Airlines Logo
1:15 pm - 9:55 pmIAD  Washington, D.C. Dulles Intl-KGS Kos
25h 40m2 stops Istanbul Athens Eleftherios V.
Multiple Airlines Logo
8:35 am - 11:30 amKGS  Kos-IAD Washington, D.C. Dulles Intl
33h 55m2 stops Athens Eleftherios V. Istanbul
$1,082Multiple Airlines
Mon, Oct 26 - Mon, Nov 2
Multiple Airlines Logo
8:40 pm - 11:15 pmIAD  Washington, D.C. Dulles Intl-KGS Kos
20h 35m2 stops Reykjavik Keflavik Intl Manchester
Multiple Airlines Logo
2:05 pm - 3:55 pmKGS  Kos-IAD Washington, D.C. Dulles Intl
32h 50m3 stops Athens Eleftherios V. Cairo Doha Hamad Intl
$1,088Multiple Airlines
Tue, Oct 6 - Fri, Oct 16
Multiple Airlines Logo
8:30 pm - 4:15 pmIAD  Washington, D.C. Dulles Intl-KGS Kos
36h 45m2 stops Reykjavik Keflavik Intl Berlin Brandenburg
Multiple Airlines Logo
10:25 pm - 3:45 pmKGS  Kos-IAD Washington, D.C. Dulles Intl
24h 20m1 stop Dublin
$1,090Multiple Airlines
Thu, Oct 8 - Thu, Oct 15
Multiple Airlines Logo
5:15 pm - 10:00 pmIAD  Washington, D.C. Dulles Intl-KGS Kos
21h 45m1 stop Dublin
Multiple Airlines Logo
9:55 pm - 2:25 pmKGS  Kos-IAD Washington, D.C. Dulles Intl
23h 30m2 stops Bergamo Orio Al Serio Lisbon Humberto Delgado
$1,095Multiple Airlines
Booking Insights

Price, demand and travel trends for Washington, D.C. Dulles Intl Airport to Kos flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Washington, D.C. Dulles Intl Airport to Kos with more confidence.

What is the most popular layover airport when flying from Washington, D.C. Dulles Intl Airport to Kos?

Athens Eleftherios V. (ATH) is the most popular layover for the Washington, D.C. Dulles Intl Airport to Kos route. 88% of KAYAK users who booked 1-stop round-trips over the past 3 months connected via ATH.

What is the cheapest layover airport when flying from Washington, D.C. Dulles Intl Airport to Kos?

Flights via Frankfurt am Main (FRA) offer the most affordable fares, with an average round-trip price of $2,227. Based on KAYAK data over the past 3 months.

When flying from Washington, D.C. Dulles Intl Airport to Kos which airport offers the shortest layover?

Frankfurt am Main (FRA) had the shortest average connection time for Washington, D.C. Dulles Intl Airport to Kos layovers at 479 minutes over the past 3 months.

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

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Kos based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Washington, D.C. Dulles Intl Airport to Kos flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which airports can I use when flying from Washington, D.C. Dulles Intl Airport to Kos?

    Flights from Washington, D.C. Dulles Intl Airport to Kos usually depart from Washington, D.C. Dulles Intl (IAD) and arrive at Kos (KGS).

  • What cabin classes can I book on flights from Washington, D.C. Dulles Intl Airport to Kos?

    Only Economy Class is available on flights from Washington, D.C. Dulles Intl Airport to Kos.

  • Which airports do connecting flights from Washington, D.C. Dulles Intl Airport to Kos pass through?

    Connecting flights from Washington, D.C. Dulles Intl Airport to Kos most commonly pass through:

    • Athens Eleftherios V. (ATH) - 88% of one-stop connections
    • Frankfurt am Main (FRA) - 13% of one-stop connections
    Together, these airports account for 101% of one-stop bookings on this route.

  • Can I save money by using flexible dates for flights from Washington, D.C. Dulles Intl Airport to Kos?

    On the Washington, D.C. Dulles Intl Airport to Kos route, being flexible with your departure day can save you up to 37%. Sunday is the cheapest day at $1,672 round-trip on average, while Wednesday is the most expensive at $2,615: a $943 difference. Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

  • How long is a flight from Washington, D.C. Dulles Intl Airport to Kos?

    A nonstop flight from Washington, D.C. Dulles Intl Airport to Kos takes 0h 00m, covering 5,336 miles.

  • Do I need a passport to fly from Washington, D.C. Dulles Intl Airport to Kos?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • Have flight prices from Washington, D.C. Dulles Intl Airport to Kos changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $1,000 to $3,695. That means the highest observed fare was about 4x higher than the lowest one.

  • How much time can I save by choosing a different layover airport from Washington, D.C. Dulles Intl Airport to Kos?

    Flying via Athens Eleftherios V. (ATH) gives the shortest average 1-stop total travel time at 13h 35m, compared with 13h 41m via Frankfurt am Main (FRA).

  • What is the time difference between Washington, D.C. Dulles Intl Airport and Kos?

    Kos is 7 hours ahead of Washington, D.C. Dulles Intl Airport (Eastern European Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car rental options are available at Kos Airport (KGS)?

    Kos Airport (KGS) hosts 5 major car rental companies, with daily rates starting from around $9 for economy cars. Top options include:
    • ABBYCAR
    • Exer Rent a Car
    • Caldera
    • Europcar
    • Alma Car Hire

  • How much should I expect to pay for a Washington, D.C. Dulles Intl Airport to Kos flight?

    Round-trip flights from Washington, D.C. Dulles Intl Airport to Kos range from $2,227 to $2,615, with an average of $2,432 over the past 12 months. Anything below $2,227 counts as a good deal.

Your guide to booking Washington, D.C. Dulles Intl Airport to Kos flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Sunday departure instead of Wednesday. On this route, Sunday flights average $1,672 - about $943 less than Wednesday (36% savings) based on the last 12 months.

More options for your flight from Washington, D.C. to Kos

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