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$385+ 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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
CGN — ORD
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
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 September 15, 2025.

Round-trip from

$551
(Billigflug)

One-way from

$385
(Flightnetwork)

Popular in

February

Cheapest in

October

Average price

$672
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. 31% potential increase in price ($364 potential increase over avg. RT price).
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Cheapest flight prices on average. 12% potential price decrease ($87 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 15, 2025.

This British Airways deal was found by Cheapflights users on 9/13. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/209:15 pmCGN - ORD
1 stop25h 40mBritish Airways
Mon 10/276:36 pmORD - CGN
2 stops15h 34mBritish Airways
Deal found 9/13$551
This British Airways deal was found by Cheapflights users on 9/15. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1610:15 amCGN - ORD
1 stop12h 40mBritish Airways
Mon 10/205:40 pmORD - CGN
1 stop13h 40mBritish Airways
Deal found 9/15$552
This British Airways deal was found by Cheapflights users on 9/13. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/295:15 pmCGN - ORD
2 stops35h 21mBritish Airways
Wed 11/56:30 pmORD - CGN
1 stop14h 40mBritish Airways
Deal found 9/13$559
This Gotogate deal was found by Cheapflights users on 9/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/206:20 amCGN - ORD
2 stops20h 04mAir Canada
Mon 10/273:35 pmORD - CGN
2 stops14h 35mAir Canada
Deal found 9/14$562
This United Airlines deal was found by Cheapflights users on 9/13. 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.
Mon 10/206:05 amCGN - ORD
1 stop13h 25mUnited Airlines
Mon 10/277:00 pmORD - CGN
1 stop11h 50mUnited Airlines
Deal found 9/13$563
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Mon 10/66:05 amCGN - ORD
1 stop15h 00mUnited Airlines
Sun 10/123:35 pmORD - CGN
1 stop13h 40mUnited Airlines
Deal found 9/15$564
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/212:55 pmCGN - ORD
2 stops17h 20mUnited Airlines
Thu 10/96:00 pmORD - CGN
1 stop11h 15mUnited Airlines
Deal found 9/13$569
This Billigflug deal was found by Cheapflights users on 9/15. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/66:05 amCGN - ORD
1 stop15h 00mMultiple Airlines
Sun 10/128:40 amORD - CGN
2 stops19h 30mMultiple Airlines
Deal found 9/15$570
This Flysmarter deal was found by Cheapflights users on 9/14. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/237:40 amCGN - ORD
2 stops14h 08mAir Canada
Tue 10/283:35 pmORD - CGN
2 stops14h 35mAir Canada
Deal found 9/14$572
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/281:35 pmCGN - ORD
1 stop31h 35mUnited Airlines
Tue 11/49:50 pmORD - CGN
1 stop12h 20mUnited Airlines
Deal found 9/13$573
This Billigflug deal was found by Cheapflights users on 9/15. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/319:10 amCGN - ORD
1 stop16h 15mMultiple Airlines
Thu 11/61:19 pmORD - CGN
2 stops24h 56mMultiple Airlines
Deal found 9/15$574
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/301:35 pmCGN - STL
2 stops15h 10mUnited Airlines
Thu 11/63:14 pmSTL - CGN
2 stops19h 01mUnited Airlines
Deal found 9/15$2,690

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 September 15, 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

Thu 2/19

5:05 pm-3:25 pm

1 stop29h 20m

Chicago O'Hare Intl

Mon 2/23

6:45 pm-4:10 pm

1 stop14h 25m

$551

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Thu 10/23

10:15 am-3:55 pm

1 stop12h 40m

Chicago O'Hare Intl

Tue 10/28

6:36 pm-4:30 pm

2 stops15h 54m

$551

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Thu 10/16

10:15 am-3:55 pm

1 stop12h 40m

Chicago O'Hare Intl

Mon 10/20

5:40 pm-2:20 pm

1 stop13h 40m

$551

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Thu 10/16

10:15 am-3:55 pm

1 stop12h 40m

Chicago O'Hare Intl

Mon 10/20

4:52 pm-2:20 pm

2 stops14h 28m

$552

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Wed 10/29

5:15 pm-10:36 pm

2 stops35h 21m

Chicago O'Hare Intl

Wed 11/5

5:10 pm-4:10 pm

2 stops16h 00m

$559

CologneSt. Louis

CGN - STL

CGNSTL

Cologne Köln/Bonn

Thu 10/30

1:35 pm-10:45 pm

2 stops15h 10m

Lambert-St Louis

Thu 11/6

3:14 pm-5:15 pm

2 stops19h 01m

$2,690

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Mon 3/2

5:15 pm-1:50 pm

1 stop27h 35m

$385

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Mon 9/22

6:15 pm-5:39 pm

3 stops54h 24m

$560

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Mon 9/22

6:05 am-2:05 pm

1 stop15h 00m

$613

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Sat 1/3

2:45 pm-4:45 pm

2 stops33h 00m

$616

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 13 results
1
2

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, August is the cheapest month in which you can book a flight from Cologne to Illinois (average of $245). Flying from Cologne to Illinois in March is currently the most expensive (average of $321). 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.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated September 15, 2025.
Get a feel of what it's like to fly with Lufthansa from Cologne to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Lufthansa
6.8
Okay
7,407 reviews

Crew

7.6

Food

6.3

Comfort

6.8

Entertainment

6.4

Overall

6.8

Boarding

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jan 2025

FRA - TPA

I had ordered a gluten-free meal through you I double triple checked that through you got screamed at by one of your representatives. She yelled at me and said that she had ordered the mail, she had chosen my seat, and made sure that all my baggage is were paid for. That was a lie. My experience with discover airlines in and of itself was GOOD but your representative was out of line did not do anything that she screamed at me and told me she did and I literally had to call the airlines myself to get my seat selected to double check on my gluten-free meal which still was not on board and to pay for my bags which I thought that I paid for all of them until I got to the airport and I still had to pay for my check back. So cheap flights I will never use you again.
Lufthansa
6.8
Okay
7,407 reviews
Lufthansa
6.8
Okay
7,407 reviews

Crew

7.6

Food

6.3

Comfort

6.8

Entertainment

6.4

Overall

6.8

Boarding

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jan 2025

FRA - TPA

I had ordered a gluten-free meal through you I double triple checked that through you got screamed at by one of your representatives. She yelled at me and said that she had ordered the mail, she had chosen my seat, and made sure that all my baggage is were paid for. That was a lie. My experience with discover airlines in and of itself was GOOD but your representative was out of line did not do anything that she screamed at me and told me she did and I literally had to call the airlines myself to get my seat selected to double check on my gluten-free meal which still was not on board and to pay for my bags which I thought that I paid for all of them until I got to the airport and I still had to pay for my check back. So cheap flights I will never use you again.

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 15h 10m. Fly via British Airways or United Airlines to get the fastest option. The distance from Cologne to Illinois is about 4494 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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, August is the cheapest month in which you can book a flight from Cologne to Illinois (average of $245). Flying from Cologne to Illinois in March is currently the most expensive (average of $321). 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.

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Alternative routes for Cologne to Illinois

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Top airline flying from Cologne to Illinois

Discover the top airline that operate flights from Cologne to Illinois. 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$558Average$872FlexibilityNo cancel feeOn-time76%

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