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$429+ 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
CGN — ORD
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$525
(AirNGo)

One-way from

$429
(Kiwi.com)

Popular in

May

Cheapest in

October

Average price

$722
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. 10% potential increase in price ($78 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 31, 2025.

This AirNGo deal was found by Cheapflights users on 7/31. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/16:05 amCGN - ORD
1 stop15h 00mUnited Airlines
Sun 9/76:00 pmORD - CGN
1 stop11h 15mUnited Airlines
Deal found 7/31$525
This Sembo deal was found by Cheapflights users on 7/31. 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 Sembo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/67:35 pmCGN - ORD
1 stop23h 55mMultiple Airlines
Wed 9/2410:40 amORD - CGN
2 stops17h 30mMultiple Airlines
Deal found 7/31$532
This Billigflug deal was found by Cheapflights users on 7/30. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/16:05 amCGN - ORD
1 stop15h 00mLufthansa
Sun 9/79:40 pmORD - CGN
1 stop12h 30mLufthansa
Deal found 7/30$536
This Booking.com deal was found by Cheapflights users on 7/31. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1810:15 amCGN - ORD
1 stop12h 40mBritish Airways
Thu 10/25:40 pmORD - CGN
1 stop20h 30mBritish Airways
Deal found 7/31$549
This Booking.com deal was found by Cheapflights users on 7/31. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/176:20 amCGN - ORD
2 stops20h 51mAir Canada
Sun 10/263:45 pmORD - CGN
2 stops14h 20mAir Canada
Deal found 7/31$557
This Air Canada deal was found by Cheapflights users on 7/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/256:35 pmCGN - STL
2 stops32h 22mAir Canada
Mon 9/294:05 pmSTL - CGN
2 stops18h 15mAir Canada
Deal found 7/30$588
This flugladen.de deal was found by Cheapflights users on 7/31. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/17:10 pmCGN - ORD
1 stop21h 30mTurkish Airlines
Sun 9/711:25 amORD - CGN
1 stop15h 05mTurkish Airlines
Deal found 7/31$890

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 July 31, 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

Mon 9/1

6:05 am-2:05 pm

1 stop15h 00m

Chicago O'Hare Intl

Sun 9/7

6:00 pm-12:15 pm

1 stop11h 15m

$525

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Sat 9/6

7:35 pm-12:30 pm

1 stop23h 55m

Chicago O'Hare Intl

Wed 9/24

10:40 am-11:10 am

2 stops17h 30m

$532

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Mon 9/1

6:05 am-2:05 pm

1 stop15h 00m

Chicago O'Hare Intl

Sun 9/7

9:40 pm-5:10 pm

1 stop12h 30m

$536

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Thu 9/18

10:15 am-3:55 pm

1 stop12h 40m

Chicago O'Hare Intl

Thu 10/2

5:40 pm-9:10 pm

1 stop20h 30m

$549

CologneSt. Louis

CGN - STL

CGNSTL

Cologne Köln/Bonn

Sat 1/17

5:10 pm-6:23 pm

2 stops32h 13m

Lambert-St Louis

Sun 1/25

3:36 pm-4:30 pm

2 stops17h 54m

$553

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Fri 10/17

6:20 am-8:11 pm

2 stops20h 51m

Chicago O'Hare Intl

Sun 10/26

3:45 pm-12:05 pm

2 stops14h 20m

$557

CologneSt. Louis

CGN - STL

CGNSTL

Cologne Köln/Bonn

Thu 9/25

6:35 pm-7:57 pm

2 stops32h 22m

Lambert-St Louis

Mon 9/29

4:05 pm-5:20 pm

2 stops18h 15m

$588

CologneSt. Louis

CGN - STL

CGNSTL

Cologne Köln/Bonn

Sat 1/17

8:40 am-12:20 pm

3 stops34h 40m

Lambert-St Louis

Sun 1/25

11:45 am-12:35 pm

2 stops17h 50m

$619

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Mon 9/1

7:10 pm-9:40 am

1 stop21h 30m

Chicago O'Hare Intl

Sun 9/7

11:25 am-9:30 am

1 stop15h 05m

$890

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

Mon 9/1

6:20 am-10:22 pm

3 stops47h 02m

$429

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 15 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, 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 July 31, 2025.
Get a feel of what it's like to fly with Austrian Airlines, United Airlines, and Turkish Airlines 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.
Austrian Airlines
7.6
Good
823 reviews

Comfort

7.3

Boarding

7.6

Crew

8.1

Entertainment

6.8

Overall

7.6

Food

6.8

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Austrian Airlines
7.6
Good
823 reviews
Austrian Airlines
7.6
Good
823 reviews

Comfort

7.3

Boarding

7.6

Crew

8.1

Entertainment

6.8

Overall

7.6

Food

6.8

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
United Airlines
7.4
Good
8,900 reviews
Austrian Airlines
7.6
Good
823 reviews

Comfort

7.3

Boarding

7.6

Crew

8.1

Entertainment

6.8

Overall

7.6

Food

6.8

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Turkish Airlines
7.3
Good
3,933 reviews
Austrian Airlines
7.6
Good
823 reviews

Comfort

7.3

Boarding

7.6

Crew

8.1

Entertainment

6.8

Overall

7.6

Food

6.8

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Air Canada
7.1
Good
9,851 reviews
Austrian Airlines
7.6
Good
823 reviews

Comfort

7.3

Boarding

7.6

Crew

8.1

Entertainment

6.8

Overall

7.6

Food

6.8

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Lufthansa
6.8
Okay
7,275 reviews
Austrian Airlines
7.6
Good
823 reviews

Comfort

7.3

Boarding

7.6

Crew

8.1

Entertainment

6.8

Overall

7.6

Food

6.8

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time

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.

  • 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 $605 on Lufthansa. Other airlines that offer cheap prices include Turkish Airlines from $1,028 and Air Canada from $1,535 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, 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.

See more FAQs

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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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$687Average$872FlexibilityNo cancel feeOn-time76%

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