$782 Cheap Flights from Cologne (CGN) to Washington (IAD)

View $782 flight on Fri, Nov 28, 2025Opens in a new window

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

Cheap Flights from Cologne to Washington (CGN-IAD)

Prices were available within the past 7 days and start at $782 for one-way flights and $538 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Wed, Oct 15 - Sun, Oct 26
CGN
Cologne
IAD
Washington
$538 Roundtrip, found 5 days ago
$538
Roundtrip
found 5 days ago
Select Air Canada flight, departing Wed, Oct 15 from Cologne to Washington, returning Sun, Oct 26, priced at $538 found 5 days ago
Lufthansa
Thu, Sep 11 - Mon, Sep 15
CGN
Cologne
IAD
Washington
$538 Roundtrip, found 12 hours ago
$538
Roundtrip
found 12 hours ago
Select Lufthansa flight, departing Thu, Sep 11 from Cologne to Washington, returning Mon, Sep 15, priced at $538 found 12 hours ago
Air Canada
Wed, Oct 15 - Sun, Oct 26
CGN
Cologne
IAD
Washington
$544 Roundtrip, found 5 days ago
$544
Roundtrip
found 5 days ago
Select Air Canada flight, departing Wed, Oct 15 from Cologne to Washington, returning Sun, Oct 26, priced at $544 found 5 days ago
Air Canada
Fri, Sep 12 - Tue, Sep 16
CGN
Cologne
IAD
Washington
$545 Roundtrip, found 2 days ago
$545
Roundtrip
found 2 days ago
Select Air Canada flight, departing Fri, Sep 12 from Cologne to Washington, returning Tue, Sep 16, priced at $545 found 2 days ago
Lufthansa
Mon, Dec 22 - Fri, Jan 2
CGN
Cologne
IAD
Washington
$554 Roundtrip, found 3 days ago
$554
Roundtrip
found 3 days ago
Select Lufthansa flight, departing Mon, Dec 22 from Cologne to Washington, returning Fri, Jan 2, priced at $554 found 3 days ago
Air Canada
Wed, Oct 15 - Sun, Oct 26
CGN
Cologne
IAD
Washington
$559 Roundtrip, found 5 days ago
$559
Roundtrip
found 5 days ago
Select Air Canada flight, departing Wed, Oct 15 from Cologne to Washington, returning Sun, Oct 26, priced at $559 found 5 days ago
Air Canada
Wed, Nov 12 - Sat, Nov 29
CGN
Cologne
IAD
Washington
$561 Roundtrip, found 5 days ago
$561
Roundtrip
found 5 days ago
Select Air Canada flight, departing Wed, Nov 12 from Cologne to Washington, returning Sat, Nov 29, priced at $561 found 5 days ago
United
Thu, Oct 16 - Sun, Oct 26
CGN
Cologne
IAD
Washington
$562 Roundtrip, found 16 hours ago
$562
Roundtrip
found 16 hours ago
Select United flight, departing Thu, Oct 16 from Cologne to Washington, returning Sun, Oct 26, priced at $562 found 16 hours ago
Austrian Airlines
Thu, Oct 16 - Sun, Oct 26
CGN
Cologne
IAD
Washington
$563 Roundtrip, found 16 hours ago
$563
Roundtrip
found 16 hours ago
Select Austrian Airlines flight, departing Thu, Oct 16 from Cologne to Washington, returning Sun, Oct 26, priced at $563 found 16 hours ago
British Airways
Thu, Oct 16 - Sun, Oct 26
CGN
Cologne
IAD
Washington
$576 Roundtrip, found 16 hours ago
$576
Roundtrip
found 16 hours ago
Select British Airways flight, departing Thu, Oct 16 from Cologne to Washington, returning Sun, Oct 26, priced at $576 found 16 hours ago
Flights from Cologne (CGN) to Washington (IAD)
Origin airport
Cologne - Bonn
Destination airport
Washington Dulles Intl.
Airlines serving
Air Canada, American Airlines, Austrian Airlines, British Airways, Lufthansa, Swiss International Air Lines, Turkish Airlines, United
Roundtrip price
$537
Distance
3986 mi

Cologne to Washington Flights

The cheapest times to fly from Cologne to Washington

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 Cologne to Washington are during the month of October. You can find some of the cheapest flights from Cologne to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Cologne to Washington

Sunday is one of the best days to book for cheap flights from Cologne to Washington: 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 Cologne to Washington

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 Cologne to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $782 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 Cologne to Washington 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 Cologne to Washington 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.

 

Frequently asked questions

How much does a flight from Cologne - Bonn Airport (CGN) to Washington Dulles Intl. Airport (IAD) cost?
Secure a cheap one-way flight from $782 or cheap return flight from $538 from Cologne - Bonn Airport (CGN) to Washington Dulles Intl. Airport (IAD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Cologne - Bonn Airport (CGN) to Washington Dulles Intl. Airport (IAD)?
Planning your trip for October may help you find better deals, as it's the cheapest month for flights between CGN and IAD. You'll typically find the lowest prices during off-peak months.
What is the cheapest airline that flies from Cologne - Bonn Airport (CGN) to Washington Dulles Intl. Airport (IAD)?
To find the cheapest airline that'll fly you from CGN to IAD, use Expedia's filter tool. Customize your search based on what's important to you, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Cologne - Bonn Airport (CGN) to Washington Dulles Intl. Airport (IAD)?
You'll need to catch a flight with a layover when traveling from Cologne - Bonn Airport (CGN) to Washington Dulles Intl. Airport (IAD). Direct flights don't operate daily on this route. However, simply filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from CGN to IAD?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Cologne - Bonn Airport (CGN) to Washington Dulles Intl. Airport (IAD)?
To arrive at Washington Dulles Intl. Airport (IAD) without delays, book a flight that leaves Cologne - Bonn Airport (CGN) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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 Cologne - Bonn Airport (CGN) to Washington Dulles Intl. Airport (IAD) last-minute?
Booking your flight from CGN to IAD just before your getaway is typically more expensive. But if there's some wiggle room with your schedule, you could snag a cheap last-minute fare.
Is it cheaper to book a CGN to IAD flight and hotel package?
You'll typically save money by booking a CGN to IAD flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one place. Once you've chosen your ideal flights and accommodations, consider adding extras such as activities, tours and car rentals.
Can I cancel or change the date of my flight from Cologne - Bonn Airport (CGN) to Washington Dulles Intl. Airport (IAD)?
If you booked your CGN to IAD flight within the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of fare you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you'd like more information.

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*Available to One Key members.