IAD - KGS

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1 adult
1 adult, Economy, 0 bags

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Everything you should know

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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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

Multiple Airlines Logo
IAD  Washington Dulles Airport-KGS Kos Airport
5336 mimulti-stop
Multiple Airlines Logo
KGS  Kos Airport-IAD Washington Dulles Airport
5336 mimulti-stop
Multiple 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 with more confidence.

What’s 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 7h 59m 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 answers about this route, including flight times, airports, airlines and booking tips.

  • 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.

  • 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 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.

  • 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 $2,174 to $2,615, with an average of $2,432 over the past 12 months. Anything below $2,174 counts as a good deal.

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

    Kos Airport (KGS) hosts 5 major car rental companies, with daily rates averaging $34 for economy cars. Top options include:

    • ABBYCAR
    • Exer Rent a Car
    • Caldera
    • Europcar
    • Alma Car Hire

  • 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).

  • 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

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

    Yes. Flexible dates can save you up to 37% on flights from Washington, D.C. Dulles Intl Airport to Kos. Thursday is the cheapest departure day at $1,658 round-trip on average, while Wednesday is the most expensive at $2,615, a difference of $957.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • 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 6 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.

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 are flexible, aim for a Thursday departure and avoid flying on Wednesday. On this route, Thursday flights average $1,658, about $957 less than Wednesday fares (37% savings) based on the last 12 months.

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

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