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$502+ Cheap flights from Cologne (CGN) to Illinois

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 3/21. Fares are subject to change and may not be available on all flights or dates of travel.
CGN — ORD
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Cologne to Illinois

Keep the following information in mind while searching for Cologne to Illinois flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$565
(Expedia)

One-way from

$502
(Billigflug)

Popular in

February

Cheapest in

March

Average price

$598
Provider with most accurate pricing for Cologne Köln/Bonn-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Cologne Köln/Bonn-Chicago (CHI) flights.
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From Cologne Köln/Bonn to Illinois
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One-way flight from Cologne Köln/Bonn to Illinois
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Highest demand for flights based on searches. 28% potential increase in price ($308 potential increase over avg. RT price).
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Cheapest flight prices on average. 12% potential price decrease ($89 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Cologne to Illinois

Cheapest flights from Cologne to Illinois
Explore the most affordable flight options available from Cologne to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Expedia deal was found by Cheapflights users on 10/30. 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.
Sun 11/168:20 pmCGN - ORD
1 stop24h 40mMultiple Airlines
Mon 11/246:00 pmORD - CGN
1 stop17h 55mMultiple Airlines
Deal found 10/30$569
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Sun 11/168:20 pmCGN - ORD
1 stop24h 40mAustrian Airlines
Mon 11/244:20 pmORD - CGN
1 stop20h 15mAustrian Airlines
Deal found 10/30$571
This United Airlines deal was found by Cheapflights users on 10/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/99:10 amCGN - ORD
1 stop16h 15mUnited Airlines
Mon 12/296:00 pmORD - CGN
1 stop16h 10mUnited Airlines
Deal found 10/29$582
This United Airlines deal was found by Cheapflights users on 10/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/131:35 pmCGN - ORD
1 stop11h 50mUnited Airlines
Tue 1/133:35 pmORD - CGN
2 stops18h 35mUnited Airlines
Deal found 10/29$583
This Air Canada deal was found by Cheapflights users on 10/29. 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.
Mon 11/106:45 amCGN - ORD
2 stops19h 45mAir Canada
Tue 12/3012:50 pmORD - CGN
2 stops26h 35mAir Canada
Deal found 10/29$584
This United Airlines deal was found by Cheapflights users on 10/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/131:35 pmCGN - ORD
2 stops17h 08mUnited Airlines
Mon 12/296:00 pmORD - CGN
1 stop11h 50mUnited Airlines
Deal found 10/29$587
This United Airlines deal was found by Cheapflights users on 10/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/159:10 amCGN - ORD
2 stops16h 21mUnited Airlines
Tue 1/133:35 pmORD - CGN
2 stops18h 35mUnited Airlines
Deal found 10/29$588
This Air Canada deal was found by Cheapflights users on 10/29. 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 11/136:45 amCGN - ORD
2 stops19h 45mAir Canada
Tue 1/133:55 pmORD - CGN
2 stops22h 20mAir Canada
Deal found 10/29$589
This United Airlines deal was found by Cheapflights users on 10/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/111:35 pmCGN - ORD
1 stop31h 35mUnited Airlines
Mon 12/296:00 pmORD - CGN
1 stop16h 10mUnited Airlines
Deal found 10/29$591
This United Airlines deal was found by Cheapflights users on 10/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/111:35 pmCGN - ORD
1 stop31h 35mUnited Airlines
Thu 1/19:50 pmORD - CGN
1 stop14h 05mUnited Airlines
Deal found 10/29$593
This United Airlines deal was found by Cheapflights users on 10/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/159:10 amCGN - ORD
2 stops17h 47mUnited Airlines
Mon 12/293:55 pmORD - CGN
2 stops13h 55mUnited Airlines
Deal found 10/29$594
This Air Canada deal was found by Cheapflights users on 10/29. 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.
Sun 11/161:40 pmCGN - ORD
2 stops52h 38mAir Canada
Wed 12/3110:35 amORD - CGN
2 stops28h 50mAir Canada
Deal found 10/29$599

Cheapflights Fare Finder

 
Customize your flight search to find flights from Cologne to Illinois 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 October 30, 2025.
Use the filters below to find and compare flights from Cologne to Illinois that are best for you.

Fly from

Cologne

Fly to

Illinois

Route

Depart

Return

Price

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Sun 11/9

9:10 am-6:25 pm

1 stop16h 15m

Chicago O'Hare Intl

Mon 11/17

9:50 pm-6:55 pm

1 stop14h 05m

$565

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Sun 11/16

8:20 pm-2:00 pm

1 stop24h 40m

Chicago O'Hare Intl

Mon 11/24

4:20 pm-7:35 pm

1 stop20h 15m

$571

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Sat 1/17

9:10 am-7:30 pm

2 stops17h 20m

Chicago O'Hare Intl

Sat 1/24

3:35 pm-12:30 pm

2 stops13h 55m

$576

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Sun 11/9

9:10 am-2:10 pm

1 stop12h 00m

Chicago O'Hare Intl

Mon 11/17

9:50 pm-5:10 pm

1 stop12h 20m

$581

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Sat 1/17

9:10 am-5:48 pm

2 stops15h 38m

Chicago O'Hare Intl

Sat 1/24

9:50 pm-5:10 pm

1 stop12h 20m

$582

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Thu 11/13

1:35 pm-6:25 pm

1 stop11h 50m

Chicago O'Hare Intl

Wed 12/31

6:00 pm-5:15 pm

1 stop16h 15m

$583

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Thu 11/13

1:35 pm-6:25 pm

1 stop11h 50m

Chicago O'Hare Intl

Wed 1/14

3:35 pm-12:50 pm

2 stops14h 15m

$583

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Sun 11/16

9:10 am-2:10 pm

1 stop12h 00m

Chicago O'Hare Intl

Thu 1/1

9:50 pm-6:55 pm

1 stop14h 05m

$583

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Sun 11/9

9:10 am-6:25 pm

1 stop16h 15m

Chicago O'Hare Intl

Thu 1/1

6:00 pm-6:55 pm

1 stop17h 55m

$583

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Tue 11/18

1:35 pm-6:25 pm

1 stop11h 50m

Chicago O'Hare Intl

Tue 1/13

2:27 pm-5:10 pm

2 stops19h 43m

$583

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 30 results
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Best time to book a flight from Cologne to Illinois

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

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

Currently, February is the cheapest month in which you can book a flight from Cologne to Illinois (average of $345). Flying from Cologne to Illinois in December is currently the most expensive (average of $552). 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.

Related info for your journey

Find useful and relevant information for your journey from Cologne to Illinois. 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 from for flights from Cologne to Illinois?

    Cologne Köln/Bonn (CGN), located 9.5 mi from the city center, is the airport you fly out of when you book flights from Cologne to Illinois.

  • How long is the flight from Cologne to Illinois?

    There are many flights that can get you from Cologne to Illinois in 16h 15m. Fly via Lufthansa, Austrian Airlines, or Air Canada to get the fastest option. The distance from Cologne to Illinois is about 4244 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Cologne to Illinois one-way?

    One-way options have recently been found by users for as low as $502 on British Airways. Other airlines that offer cheap prices include Lufthansa from $831 and Turkish Airlines from $974 one-way.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Cologne to Illinois (average of $345). Flying from Cologne to Illinois in December is currently the most expensive (average of $552). 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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