HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Cologne

$307+ Cheap flights from Illinois 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 1/6. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — CGN
Jan 21 — Jan 281
Wed 1/21
Wed 1/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to Cologne with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Illinois to Cologne

Cheapest flights from Illinois to Cologne
Explore the most affordable flight options available from Illinois to Cologne. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 22, 2025.

This oojo deal was found by Cheapflights users on 12/21. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2511:43 amSTL - CGN
2 stops20h 57mBritish Airways
Wed 1/75:15 pmCGN - STL
2 stops33h 14mBritish Airways
Deal found 12/21$1,332
This KAYAK deal was found by Cheapflights users on 12/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/238:35 pmORD - CGN
2 stops54h 40mBritish Airways
Tue 12/3011:45 amCGN - ORD
2 stops32h 34mBritish Airways
Deal found 12/20$1,420
This KAYAK deal was found by Cheapflights users on 12/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/255:40 pmORD - CGN
2 stops35h 00mBritish Airways
Tue 12/3011:45 amCGN - ORD
2 stops31h 15mBritish Airways
Deal found 12/20$1,448
This KAYAK deal was found by Cheapflights users on 12/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/244:05 pmORD - CGN
2 stops35h 10mBritish Airways
Tue 12/3011:45 amCGN - ORD
2 stops36h 35mBritish Airways
Deal found 12/20$1,467
This Kiwi.com deal was found by Cheapflights users on 12/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:50 pmORD - CGN
2 stops19h 05mMultiple Airlines
Tue 12/306:15 pmCGN - ORD
1 stop31h 10mMultiple Airlines
Deal found 12/20$1,504
This KAYAK deal was found by Cheapflights users on 12/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/238:35 pmORD - CGN
2 stops54h 40mBritish Airways
Wed 12/3112:00 pmCGN - ORD
2 stops34h 45mBritish Airways
Deal found 12/20$1,576
This KAYAK deal was found by Cheapflights users on 12/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/258:20 pmORD - CGN
1 stop31h 15mTurkish Airlines
Tue 12/3011:35 amCGN - ORD
1 stop37h 50mTurkish Airlines
Deal found 12/20$1,593
This KAYAK deal was found by Cheapflights users on 12/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/255:40 pmORD - CGN
2 stops35h 00mBritish Airways
Wed 12/3112:00 pmCGN - ORD
2 stops32h 44mBritish Airways
Deal found 12/20$1,604
This KAYAK deal was found by Cheapflights users on 12/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/244:05 pmORD - CGN
2 stops35h 10mBritish Airways
Wed 12/3112:00 pmCGN - ORD
2 stops32h 44mBritish Airways
Deal found 12/20$1,623
This KAYAK deal was found by Cheapflights users on 12/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/228:35 pmORD - CGN
2 stops36h 55mBritish Airways
Tue 12/3011:45 amCGN - ORD
2 stops32h 34mBritish Airways
Deal found 12/20$1,653
This Air Canada deal was found by Cheapflights users on 12/21. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/254:05 pmSTL - CGN
2 stops13h 05mAir Canada
Wed 1/78:40 amCGN - STL
3 stops19h 33mAir Canada
Deal found 12/21$1,879

Find flight deals from Illinois to Cologne

Keep the following information in mind while searching for Illinois to Cologne flight deals. Data was last updated December 22, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$558
(Cheapflightsfares)

One-way from

$307
(Kiwi.com)

Popular in

November

Cheapest in

February

Average price

$697
Provider with most accurate pricing for Chicago (CHI)-Cologne Köln/Bonn flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Cologne Köln/Bonn flights.
Search Deals
From Illinois to Cologne Köln/Bonn
Search Deals
One-way flight from Illinois to Cologne Köln/Bonn
Search Deals
Highest demand for flights based on searches. 38% potential increase in price ($618 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 27% potential price decrease ($211 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois 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 December 22, 2025.
Use the filters below to find and compare flights from Illinois to Cologne that are best for you.

Fly from

Illinois

Fly to

Cologne

Route

Depart

Return

Price

St. LouisCologne

STL - CGN

STLCGN

Lambert-St Louis

Tue 2/24

1:11 pm-12:35 pm

2 stops16h 24m

Cologne Köln/Bonn

Sun 3/1

1:15 pm-9:40 pm

2 stops15h 25m

$558

St. LouisCologne

STL - CGN

STLCGN

Lambert-St Louis

Wed 2/4

4:05 pm-12:10 pm

2 stops13h 05m

Cologne Köln/Bonn

Wed 2/11

1:20 pm-10:58 pm

2 stops16h 38m

$574

St. LouisCologne

STL - CGN

STLCGN

Lambert-St Louis

Thu 3/5

4:05 pm-12:10 pm

2 stops37h 05m

Cologne Köln/Bonn

Mon 3/16

1:20 pm-11:51 pm

2 stops16h 31m

$579

St. LouisCologne

STL - CGN

STLCGN

Lambert-St Louis

Wed 2/4

4:05 pm-12:10 pm

2 stops13h 05m

Cologne Köln/Bonn

Sun 2/8

1:40 pm-3:29 pm

2 stops32h 49m

$585

St. LouisCologne

STL - CGN

STLCGN

Lambert-St Louis

Thu 3/5

4:05 pm-4:20 pm

2 stops17h 15m

Cologne Köln/Bonn

Mon 3/16

8:40 am-3:29 pm

2 stops36h 49m

$585

ChicagoCologne

ORD - CGN

ORDCGN

Chicago O'Hare Intl

Fri 2/20

8:20 pm-10:35 am

1 stop31h 15m

Cologne Köln/Bonn

Sun 2/22

6:15 pm-6:25 pm

1 stop31h 10m

$593

ChicagoCologne

ORD - CGN

ORDCGN

Chicago O'Hare Intl

Wed 2/11

8:20 pm-10:35 am

1 stop31h 15m

Cologne Köln/Bonn

Wed 2/18

11:35 am-10:05 am

1 stop29h 30m

$619

ChicagoCologne

ORD - CGN

ORDCGN

Chicago O'Hare Intl

Wed 2/4

11:50 am-10:35 am

1 stop15h 45m

Cologne Köln/Bonn

Wed 2/11

11:35 am-6:25 pm

1 stop37h 50m

$619

ChicagoCologne

ORD - CGN

ORDCGN

Chicago O'Hare Intl

Wed 2/11

8:37 am-4:10 pm

2 stops24h 33m

Cologne Köln/Bonn

Wed 2/18

5:15 pm-6:02 pm

2 stops31h 47m

$649

ChicagoCologne

ORD - CGN

ORDCGN

Chicago O'Hare Intl

Wed 2/4

5:25 pm-3:40 pm

2 stops39h 15m

Cologne Köln/Bonn

Wed 2/11

5:15 pm-7:29 pm

2 stops33h 14m

$696

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 24 results
1
2
3

Best time to book a flight from Illinois to Cologne

Have a flexible travel schedule? Discover the best time to fly to Cologne from Illinois 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 Illinois to Cologne

What is the cheapest month to book a flight from Illinois to Cologne?

Currently, March is the cheapest month in which you can book a flight from Illinois to Cologne (average of $392). Flying from Illinois to Cologne in June is currently the most expensive (average of $738). 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.

What is the cheapest time of day to fly from IL to CGN?

Find hourly flight availability from Illinois to Cologne. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 22, 2025.

When flying from Illinois to Cologne, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 46% versus a flight in the afternoon.

Related info for your journey

Find useful and relevant information for your journey from Illinois 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 Illinois?

    Located just 9.5 mi from the city center, Cologne Köln/Bonn (CGN) is the airport most travelers will use when flying to Cologne from Illinois.

  • How long is the flight from Illinois to Cologne?

    Airlines like Lufthansa, Air Canada, and Turkish Airlines fly from Illinois to Cologne in about 13h 05m. The time it takes to get you to your destination can typically vary by up to 18h 10m. The distance between Illinois and Cologne is about 4494 mi. This flight may include one or multiple stops.

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

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

  • How can I find direct flights from Illinois to Cologne?

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

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

    Yes. Cheapflights offers flight deals from Illinois 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 Illinois to Cologne?

    Currently, March is the cheapest month in which you can book a flight from Illinois to Cologne (average of $392). Flying from Illinois to Cologne in June is currently the most expensive (average of $738). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Cologne

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Frankfurt flights
John F Kennedy Intl to Frankfurt flights
Dallas/Fort Worth to Frankfurt flights
Dulles Intl to Frankfurt flights
Newark to Berlin flights
LaGuardia to Frankfurt flights
Los Angeles to Frankfurt flights
John F Kennedy Intl to Munich flights
O'Hare Intl to Frankfurt flights
San Francisco to Frankfurt flights
John F Kennedy Intl to Berlin flights
Boston to Frankfurt flights
Newark to Munich flights
Miami to Frankfurt flights
Hobby to Frankfurt flights
Boston to Munich flights
Detroit to Frankfurt flights
Denver to Frankfurt flights
O'Hare Intl to Munich flights
George Bush Intcntl to Frankfurt flights
San Francisco to Munich flights
Atlanta to Frankfurt flights
Orlando to Frankfurt flights
Dulles Intl to Munich flights
Seattle to Frankfurt flights
Tampa to Frankfurt flights
Denver to Munich flights
LaGuardia to Berlin flights
Baltimore to Frankfurt flights
Reagan-National to Frankfurt flights
Los Angeles to Munich flights
Love Field to Frankfurt flights
LaGuardia to Munich flights
Philadelphia to Frankfurt flights
Seattle to Munich flights
Charlotte to Munich flights
Fort Lauderdale to Frankfurt flights
John F Kennedy Intl to Frankfurt-Hahn flights
Charlotte to Frankfurt flights
Miami to Munich flights
Ontario to Frankfurt flights
Boston to Berlin flights
San Francisco to Berlin flights
Santa Ana to Frankfurt flights
Atlanta to Munich flights
Raleigh to Frankfurt flights
Los Angeles to Berlin flights
O'Hare Intl to Berlin flights
San Diego to Munich flights
Dulles Intl to Berlin flights

Top airline flying from Illinois to Cologne

Discover the top airline that operate flights from Illinois 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 December 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$584Average$762FlexibilityNo cancel feeOn-time70%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.