Ancient ruins with stone columns and scattered trees.

CA $1,113 Cheap Flights from Washington (IAD) to Kos (KGS)

View CA $1,113 flight on Sun, Sep 27, 2026Opens in a new window

Popular airlines from Washington Dulles International Airport (IAD) to Kos (KGS-Kos Island Intl.)

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Cheap flights from Washington (IAD) to Kos (KGS)

Prices were available within the past 7 days and start at CA $1,113 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

How much does a flight from Washington, DC (IAD-Washington Dulles Intl.) to Kos (KGS-Kos Island Intl.) cost?
You can find one-way and return flights from IAD to KGS with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when IAD to KGS ticket fares go up or down.
What is the cheapest month to fly from Washington, DC (IAD-Washington Dulles Intl.) to Kos (KGS-Kos Island Intl.)?
The cheapest months to fly from IAD to KGS are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Washington, DC (IAD-Washington Dulles Intl.) to Kos (KGS-Kos Island Intl.)?
Enter IAD to KGS and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Washington, DC (IAD-Washington Dulles Intl.) to Kos (KGS-Kos Island Intl.)?
To find a cheap flight from Washington, DC (IAD-Washington Dulles Intl.) to Kos (KGS-Kos Island Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Washington, DC (IAD-Washington Dulles Intl.) to Kos (KGS-Kos Island Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Washington, DC (IAD-Washington Dulles Intl.) to Kos (KGS-Kos Island Intl.)?
There are approximately 19 connecting flights per day from Washington Dulles Intl. (IAD) to Kos Island Intl. (KGS). Some common connection points include Pearson Intl. (YYZ), Franz Josef Strauss Intl. (MUC), and Heathrow (LHR).
What is the earliest flight from Washington, DC (IAD-Washington Dulles Intl.) to Kos (KGS-Kos Island Intl.)?
The earliest flight from Washington Dulles Intl. (IAD) to Kos Island Intl. (KGS) typically departs around 5:00 AM local time. This flight is operated by American Airlines and Sky Express. This is a seasonal service, active only in July. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Washington, DC (IAD-Washington Dulles Intl.) to Kos (KGS-Kos Island Intl.)?
You'll typically find the most flights from Washington Dulles Intl. (IAD) to Kos Island Intl. (KGS) on a Friday, with around 38 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include United, American Airlines, and Delta.
What are the most popular departure times for flights from Washington, DC (IAD-Washington Dulles Intl.) to Kos (KGS-Kos Island Intl.)?
The most popular departure times for flights from Washington Dulles Intl. (IAD) to Kos Island Intl. (KGS) are in the late evening, from 9pm to midnight. Many major carriers, including Lufthansa and United, offer flights during this window. Many travellers prefer this because you can make the most of your day before your evening flight, and you'll arrive at your destination in the morning.
How long does it take to fly from Washington, DC (IAD-Washington Dulles Intl.) to Kos (KGS-Kos Island Intl.)?
There are no nonstop flights from Washington, DC (IAD-Washington Dulles Intl.) to Kos (KGS-Kos Island Intl.). The distance between these two airports is approximately 8,592 kilometres. Flights with one stop typically take around 14 hours 30 minutes. If you have two or more stops, your travel time will be longer, usually around 17 hours. Keep in mind that these are average travel times, and your actual flight duration can vary depending on the specific routing, layover times, and even weather conditions.
Can you fly business or first class from Washington, DC (IAD) to Kos (KGS)?
Select the "Business class" and "First class" filters when looking for Washington, DC (IAD) to Kos (KGS) flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Kos (KGS-Kos Island Intl.) flight with Expedia?
It's easy to earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Kos (KGS-Kos Island Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Kos (KGS) from Washington, DC (IAD)?
If you're planning to travel to Kos from Washington Dulles Intl. (IAD), you can fly directly into Kos Island Intl. (KGS). Some flights may connect through major hubs like Charlotte-Douglas Intl. (CLT), John F. Kennedy Intl. (JFK), or Dallas-Fort Worth Intl. (DFW) before reaching Kos. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Washington, DC (IAD-Washington Dulles Intl.) to Kos (KGS-Kos Island Intl.) at the last minute?
Typically, booking a last minute flight from Washington, DC (IAD-Washington Dulles Intl.) to Kos (KGS-Kos Island Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Washington, DC (IAD-Washington Dulles Intl.) to Kos (KGS-Kos Island Intl.) flight and hotel package?
Securing a Washington, DC (IAD-Washington Dulles Intl.) to Kos (KGS-Kos Island Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Washington, DC (IAD-Washington Dulles Intl.) to Kos (KGS-Kos Island Intl.)?
If you booked your Washington, DC (IAD-Washington Dulles Intl.) to Kos (KGS-Kos Island Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Kos Island Intl.
Distance
8542 km

Book with confidence

Chantilly to Kos Flights

The easy way to book your flights from Washington to Kos 

With Expedia, it’s simple to find and book flights to Kos from Washington whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 8 airlines that cover this route. There are nonstop flights to Kos Island Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Washington to Kos today, tomorrow, or this week.  

 

Save dollars with cheap flights from Washington Dulles Intl., IAD to Kos Island Intl., KGS 

Sort your search results by price to find great deals on your flight from Washington to Kos—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Kos from Washington currently is just rising to .  

Here are more money-saving tips: 

  • Fly in when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Kos  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Kos from Washington 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Kos with Expedia today.

Chantilly to Kos Flights

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