$423 Cheap Flights from Washington (IAD) to Cologne (CGN)

View $423 flight on Mon, Mar 16, 2026Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Cologne - Bonn Airport (CGN)

Cheap Flights from Washington to Cologne (IAD-CGN)

Prices were available within the past 7 days and start at $423 for one-way flights and $553 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Tue, Jan 6 - Fri, May 1
IAD
Washington
CGN
Cologne
$553 Roundtrip, found 2 hours ago
$553
Roundtrip
found 2 hours ago
Select British Airways flight, departing Tue, Jan 6 from Washington to Cologne, returning Fri, May 1, priced at $553 found 2 hours ago
British Airways
Wed, Jan 7 - Mon, Jan 19
IAD
Washington
CGN
Cologne
$556 Roundtrip, found 4 days ago
$556
Roundtrip
found 4 days ago
Select British Airways flight, departing Wed, Jan 7 from Washington to Cologne, returning Mon, Jan 19, priced at $556 found 4 days ago
British Airways
Wed, Jan 14 - Mon, Feb 2
IAD
Washington
CGN
Cologne
$556 Roundtrip, found 1 day ago
$556
Roundtrip
found 1 day ago
Select British Airways flight, departing Wed, Jan 14 from Washington to Cologne, returning Mon, Feb 2, priced at $556 found 1 day ago
British Airways
Mon, Apr 20 - Mon, Apr 27
IAD
Washington
CGN
Cologne
$577 Roundtrip, found 6 days ago
$577
Roundtrip
found 6 days ago
Select British Airways flight, departing Mon, Apr 20 from Washington to Cologne, returning Mon, Apr 27, priced at $577 found 6 days ago
British Airways
Thu, Apr 23 - Thu, Apr 30
IAD
Washington
CGN
Cologne
$578 Roundtrip, found 2 hours ago
$578
Roundtrip
found 2 hours ago
Select British Airways flight, departing Thu, Apr 23 from Washington to Cologne, returning Thu, Apr 30, priced at $578 found 2 hours ago
British Airways
Tue, Nov 4 - Tue, Nov 11
IAD
Washington
CGN
Cologne
$578 Roundtrip, found 1 day ago
$578
Roundtrip
found 1 day ago
Select British Airways flight, departing Tue, Nov 4 from Washington to Cologne, returning Tue, Nov 11, priced at $578 found 1 day ago
American Airlines
Tue, Aug 25 - Sun, Aug 30
IAD
Washington
CGN
Cologne
$606 Roundtrip, found 1 day ago
$606
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Aug 25 from Washington to Cologne, returning Sun, Aug 30, priced at $606 found 1 day ago
Air Canada
Mon, Dec 1 - Sun, Dec 7
IAD
Washington
CGN
Cologne
$613 Roundtrip, found 1 day ago
$613
Roundtrip
found 1 day ago
Select Air Canada flight, departing Mon, Dec 1 from Washington to Cologne, returning Sun, Dec 7, priced at $613 found 1 day ago
Austrian Airlines
Thu, Feb 12 - Sun, Feb 15
IAD
Washington
CGN
Cologne
$658 Roundtrip, found 6 hours ago
$658
Roundtrip
found 6 hours ago
Select Austrian Airlines flight, departing Thu, Feb 12 from Washington to Cologne, returning Sun, Feb 15, priced at $658 found 6 hours ago
Turkish Airlines
Thu, Jan 15 - Sat, Jan 17
IAD
Washington
CGN
Cologne
$678 Roundtrip, found 1 day ago
$678
Roundtrip
found 1 day ago
Select Turkish Airlines flight, departing Thu, Jan 15 from Washington to Cologne, returning Sat, Jan 17, priced at $678 found 1 day ago

Alternative airports near Cologne

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Cologne - Bonn CGN. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $673
CGN
Cologne - Bonn
CheapestClosest
Average driving time to city center14 min
Flights from $673

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Cologne - Bonn Airport (CGN) cost?
Grab a cheap one-way flight from $423 or cheap return flight from $553 from Washington Dulles Intl. Airport (IAD) to Cologne - Bonn Airport (CGN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Cologne - Bonn Airport (CGN)?
January is the least expensive month to fly from IAD to CGN. Traveling outside of peak seasons is often the key to scoring lower fares.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Cologne - Bonn Airport (CGN)?
Use the filters on Expedia to compare airlines and find the most affordable carrier that'll fly you from IAD to CGN. Then, sort your results by "Price (lowest to highest)" to snag a great deal.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Cologne - Bonn Airport (CGN)?
Nonstop flights from Washington Dulles Intl. Airport (IAD) to Cologne - Bonn Airport (CGN) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from IAD to CGN?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Cologne - Bonn Airport (CGN)?
To avoid potential delays on the Washington Dulles Intl. Airport (IAD) to Cologne - Bonn Airport (CGN) route, aim to fly before 3 PM. Departures after this hour have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Cologne - Bonn Airport (CGN) last-minute?
Holding off until right before your break to book a flight from IAD to CGN often results in higher prices. While it's possible to find some last-minute deals, there's no guarantee. Keep your travel plans flexible for a better chance of getting a bargain.
Is it cheaper to book an IAD to CGN flight and hotel package?
Securing an IAD to CGN flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip in one place. Pick from our wide range of accommodations and then add car rentals, activities and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Cologne - Bonn Airport (CGN)?
You can usually cancel or reschedule your IAD to CGN flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Cologne - Bonn
Airlines serving
Air Canada, American Airlines, Austrian Airlines, British Airways, Lufthansa, Swiss International Air Lines, Turkish Airlines, United
Roundtrip price
$552
Distance
3986 mi

Book with confidence

Washington to Cologne Flights

The cheapest times to fly from Washington to Cologne

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Cologne are during the month of January. You can find some of the cheapest flights from Washington to Cologne with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Cologne

Sunday is one of the best days to book for cheap flights from Washington to Cologne: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Cologne

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Cologne in 2025. You can also book with separate airlines for your outbound and return journeys, from $423 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Cologne flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Cologne airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Washington to Cologne Flights

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*Available to One Key members.