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Cologne

$447+ Cheap flights from Dulles Intl (IAD) to Cologne (CGN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/23. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — CGN
Dec 21 — Dec 281
Sun 12/21
Sun 12/28
1 adult, Economy
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Cheap flight deals from Dulles Intl to Cologne

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Cologne (CGN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 21, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$552
(oojo)

One-way from

$447
(United Airlines)

Popular in

December

Cheapest in

November

Average price

$474
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Cologne Köln/Bonn flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Cologne Köln/Bonn flights.
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From Washington, D.C. Dulles Intl to Cologne Köln/Bonn
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One-way flight from Washington, D.C. Dulles Intl to Cologne Köln/Bonn
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High demand for flights, 7% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Dulles Intl to Cologne

Cheapest flights from Dulles Intl to Cologne
Explore the most affordable flight options available from Dulles Intl to Cologne. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 21, 2025.

This FlightHub deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/31:30 pmIAD - CGN
1 stop21h 45mTurkish Airlines
Mon 12/811:35 amCGN - IAD
1 stop30h 10mTurkish Airlines
Deal found 11/18$637
This Expedia deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/195:10 pmIAD - CGN
2 stops23h 15mAir Canada
Tue 12/26:45 amCGN - IAD
2 stops20h 14mAir Canada
Deal found 11/19$674
This Cheapflightsfares deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:20 pmIAD - CGN
2 stops12h 30mLufthansa
Mon 12/81:20 pmCGN - IAD
1 stop12h 45mLufthansa
Deal found 11/18$675
This Expedia deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/195:10 pmIAD - CGN
2 stops23h 15mMultiple Airlines
Tue 12/27:40 pmCGN - IAD
1 stop30h 25mMultiple Airlines
Deal found 11/19$682
This Air Canada deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1912:42 pmIAD - CGN
2 stops27h 43mAir Canada
Wed 12/38:40 amCGN - IAD
2 stops18h 42mAir Canada
Deal found 11/19$683
This Air Canada deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/34:30 pmIAD - CGN
2 stops14h 20mAir Canada
Mon 12/88:40 amCGN - IAD
2 stops17h 46mAir Canada
Deal found 11/18$705
This Expedia deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1910:55 pmIAD - CGN
1 stop27h 30mLufthansa
Tue 12/25:55 pmCGN - IAD
1 stop32h 10mLufthansa
Deal found 11/19$717
This Justfly.com deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/74:30 pmIAD - CGN
2 stops13h 40mAir Canada
Fri 1/98:40 amCGN - IAD
2 stops18h 45mAir Canada
Deal found 11/19$728
This Cheapflightsfares deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/710:55 pmIAD - CGN
1 stop12h 15mLufthansa
Fri 1/95:55 pmCGN - IAD
2 stops26h 05mLufthansa
Deal found 11/19$734
This Mytrip deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2410:55 pmIAD - CGN
3 stops28h 00mMultiple Airlines
Mon 12/17:35 pmCGN - IAD
3 stops31h 24mMultiple Airlines
Deal found 11/20$736
This Cheapflightsfares deal was found by Cheapflights users on 11/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/156:05 pmIAD - CGN
2 stops17h 05mLufthansa
Wed 12/241:20 pmCGN - IAD
1 stop12h 45mLufthansa
Deal found 11/21$742
This Cheapflightsfares deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/206:30 pmIAD - CGN
2 stops18h 25mLufthansa
Sun 11/239:10 amCGN - IAD
1 stop16h 55mLufthansa
Deal found 11/20$743

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Cologne that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 21, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Cologne that are best for you.

Fly from

Dulles Intl

Fly to

Cologne

Route

Depart

Return

Price

Washington, D.C.Cologne

IAD - CGN

IADCGN

Washington, D.C. Dulles Intl

Wed 2/11

6:20 pm-4:10 pm

1 stop15h 50m

Cologne Köln/Bonn

Tue 2/24

5:05 pm-7:55 pm

1 stop32h 50m

$571

Washington, D.C.Cologne

IAD - CGN

IADCGN

Washington, D.C. Dulles Intl

Thu 1/29

6:20 pm-3:40 pm

1 stop15h 20m

Cologne Köln/Bonn

Mon 2/2

5:15 pm-3:35 pm

1 stop28h 20m

$571

Washington, D.C.Cologne

IAD - CGN

IADCGN

Washington, D.C. Dulles Intl

Sun 3/29

1:20 pm-1:50 pm

1 stop18h 30m

Cologne Köln/Bonn

Tue 4/7

10:30 am-11:35 am

1 stop31h 05m

$613

Washington, D.C.Cologne

IAD - CGN

IADCGN

Washington, D.C. Dulles Intl

Tue 3/24

2:30 pm-10:35 am

1 stop15h 05m

Cologne Köln/Bonn

Thu 4/9

7:10 pm-11:35 am

1 stop22h 25m

$629

Washington, D.C.Cologne

IAD - CGN

IADCGN

Washington, D.C. Dulles Intl

Mon 3/23

2:30 pm-5:15 pm

1 stop21h 45m

Cologne Köln/Bonn

Wed 4/8

7:10 pm-7:45 pm

1 stop30h 35m

$629

Washington, D.C.Cologne

IAD - CGN

IADCGN

Washington, D.C. Dulles Intl

Tue 3/24

2:30 pm-10:35 am

1 stop15h 05m

Cologne Köln/Bonn

Wed 4/8

7:10 pm-11:35 am

1 stop22h 25m

$629

Washington, D.C.Cologne

IAD - CGN

IADCGN

Washington, D.C. Dulles Intl

Mon 3/23

2:30 pm-10:35 am

1 stop15h 05m

Cologne Köln/Bonn

Fri 4/10

7:10 pm-11:35 am

1 stop22h 25m

$658

Washington, D.C.Cologne

IAD - CGN

IADCGN

Washington, D.C. Dulles Intl

Wed 2/11

5:20 pm-12:50 pm

2 stops13h 30m

Cologne Köln/Bonn

Sun 2/22

9:10 am-3:35 pm

1 stop12h 25m

$683

Washington, D.C.Cologne

IAD - CGN

IADCGN

Washington, D.C. Dulles Intl

Wed 2/11

5:25 pm-12:50 pm

2 stops13h 25m

Cologne Köln/Bonn

Tue 2/24

9:10 am-3:35 pm

1 stop12h 25m

$685

Washington, D.C.Cologne

IAD - CGN

IADCGN

Washington, D.C. Dulles Intl

Wed 3/25

2:30 pm-5:15 pm

1 stop21h 45m

Cologne Köln/Bonn

Thu 4/9

7:10 pm-11:35 am

1 stop22h 25m

$685

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/21

Showing 1-10 of 22 results
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Compare providers for flights from Dulles Intl to Cologne

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Cologne in November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Cologne flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C. Dulles Intl Airport-Cologne flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Cologne flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Cologne flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-Cologne flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Dulles Intl to Cologne

Have a flexible travel schedule? Discover the best time to fly to Cologne from Dulles Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Cologne

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Cologne?

Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Cologne (average of $472). Flying from Washington, D.C. Dulles Intl Airport to Cologne in June is currently the most expensive (average of $620). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Cologne?

Reviews of airlines servicing Cologne

Get insights into the airlines that provide service to Cologne. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Cologne. Reviews last updated November 21, 2025.
Read reviews from past customers who have flown United Airlines, Lufthansa, and British Airways from Washington, D.C. Dulles Intl Airport to Cologne. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,029 reviews

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,029 reviews
United Airlines
7.4
Good
9,029 reviews

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Lufthansa
6.8
Okay
7,579 reviews
United Airlines
7.4
Good
9,029 reviews

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
British Airways
6.7
Okay
7,533 reviews
United Airlines
7.4
Good
9,029 reviews

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Cologne. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Cologne from Washington, D.C. Dulles Intl?

    For a flight from Washington, D.C. Dulles Intl to Cologne, you will be flying into Köln/Bonn. Cologne Köln/Bonn (CGN) is just 9.5 mi from the center of the city. Köln/Bonn is the only Cologne airport and it handles 0 inbound flights from Washington, D.C. Dulles Intl per day. 3 airlines have flights to Cologne Köln/Bonn from Washington, D.C. Dulles Intl on a regular basis.

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

    A quick flight from Washington, D.C. Dulles Intl Airport to Cologne can take about 15h 50m. British Airways provides one of the quickest options available for as low as $571. Washington, D.C. Dulles Intl Airport and Cologne are separated by a distance of 3986 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Cologne round-trip?

    British Airways, at $591, was found to be the cheapest airline from Washington, D.C. Dulles Intl Airport to Cologne.Alternate airlines to your destination round-trip include United Airlines and Lufthansa. British Airways is currently priced 23% below the average price you’ll pay for this route.

  • Can I find deals for flights from Dulles Intl to Cologne that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Cologne flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Cologne?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Cologne.

  • Can I find deals for business class flights from Dulles Intl to Cologne?

    Yes. Cheapflights offers flight deals from Dulles Intl to Cologne by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Cologne?

    Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Cologne (average of $472). Flying from Washington, D.C. Dulles Intl Airport to Cologne in June is currently the most expensive (average of $620). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Dulles Intl to Cologne

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Dulles Intl to Cologne

Discover the top 3 airlines that operate flights from Dulles Intl to Cologne. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$591Average$735FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$634Average$1,185FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$678Average$879FlexibilityNo cancel feeOn-time76%

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