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$510+ Cheap flights from Cologne (CGN) to Illinois

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
CGN — ORD
may. 4 — may. 111
dom. 5/4
dom. 5/11
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 abril 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
2 stars

Round-trip from

$511
(Billigflug)

Popular in

May

Cheapest in

September

Average price

$636
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
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($71 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in April 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 abril 29, 2025.

This Billigflug deal was found by Cheapflights users on 4/29. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/119:15 pmCGN - ORD
1 stop21h 35mMultiple Airlines
jue. 10/93:14 pmORD - CGN
2 stops15h 21mMultiple Airlines
Deal found 4/29$510
This American Airlines deal was found by Cheapflights users on 4/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 5/1810:15 amCGN - ORD
1 stop12h 40mAmerican Airlines
dom. 5/2510:25 pmORD - CGN
1 stop15h 00mAmerican Airlines
Deal found 4/28$514
This Booking.com deal was found by Cheapflights users on 4/28. 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.
dom. 5/189:35 pmCGN - ORD
1 stop21h 10mBritish Airways
dom. 5/256:35 pmORD - CGN
2 stops18h 50mBritish Airways
Deal found 4/28$516
This Booking.com deal was found by Cheapflights users on 4/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/157:40 amCGN - ORD
2 stops19h 32mAir Canada
mié. 6/48:40 amORD - CGN
2 stops19h 30mAir Canada
Deal found 4/29$525
This Lufthansa deal was found by Cheapflights users on 4/29. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/128:40 amCGN - ORD
1 stop12h 20mLufthansa
dom. 10/129:40 pmORD - CGN
1 stop14h 40mLufthansa
Deal found 4/29$549
This Booking.com deal was found by Cheapflights users on 4/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 6/1310:00 pmCGN - STL
2 stops27h 31mBritish Airways
vie. 6/205:29 pmSTL - CGN
2 stops57h 16mBritish Airways
Deal found 4/29$616
This United Airlines deal was found by Cheapflights users on 4/29. 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.
vie. 6/136:05 amCGN - ORD
2 stops20h 50mUnited Airlines
vie. 6/2010:00 amORD - CGN
2 stops24h 35mUnited Airlines
Deal found 4/29$627
This Austrian Airlines deal was found by Cheapflights users on 4/29. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 7/79:35 amCGN - ORD
2 stops32h 50mAustrian Airlines
vie. 7/185:55 pmORD - CGN
2 stops55h 55mAustrian Airlines
Deal found 4/29$1,093
This Turkish Airlines deal was found by Cheapflights users on 4/28. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 4/282:50 pmCGN - ORD
1 stop25h 50mTurkish Airlines
vie. 5/211:25 amORD - CGN
1 stop15h 05mTurkish Airlines
Deal found 4/28$1,112
This Flysmarter deal was found by Cheapflights users on 4/29. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 6/136:20 amCGN - STL
2 stops20h 38mAir Canada
vie. 6/2011:20 amSTL - CGN
3 stops16h 50mAir Canada
Deal found 4/29$1,118
This Mytrip deal was found by Cheapflights users on 4/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/121:50 amCGN - STL
3 stops25h 08mMultiple Airlines
vie. 6/207:30 amSTL - CGN
2 stops26h 25mMultiple Airlines
Deal found 4/29$2,871
This Flighttix deal was found by Cheapflights users on 4/29. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 7/197:05 amCGN - ORD
1 stop15h 50mSWISS
lun. 7/283:55 pmORD - CGN
1 stop10h 45mSWISS
Deal found 4/29$3,710

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 abril 29, 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

jue. 5/15

12:55 pm-6:15 pm

1 stop12h 20m

Chicago O'Hare Intl

mié. 6/4

10:40 am-11:10 am

2 stops17h 30m

$511

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

dom. 5/18

10:15 am-3:55 pm

1 stop12h 40m

Chicago O'Hare Intl

dom. 5/25

10:25 pm-8:25 pm

1 stop15h 00m

$514

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

dom. 5/18

9:35 pm-11:45 am

1 stop21h 10m

Chicago O'Hare Intl

dom. 5/25

6:35 pm-8:25 pm

2 stops18h 50m

$516

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

jue. 5/15

7:40 am-8:12 pm

2 stops19h 32m

Chicago O'Hare Intl

mié. 6/4

8:40 am-11:10 am

2 stops19h 30m

$525

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

lun. 6/30

6:05 am-2:55 pm

2 stops15h 50m

Chicago O'Hare Intl

dom. 9/7

9:40 pm-7:20 pm

1 stop14h 40m

$573

CologneSt. Louis

CGN - STL

CGNSTL

Cologne Köln/Bonn

vie. 6/13

10:00 pm-6:31 pm

2 stops27h 31m

Lambert-St Louis

vie. 6/20

5:29 pm-9:45 am

2 stops57h 16m

$616

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

vie. 6/13

6:05 am-7:55 pm

2 stops20h 50m

Chicago O'Hare Intl

vie. 6/20

10:00 am-5:35 pm

2 stops24h 35m

$627

CologneChicago

CGN - ORD

CGNORD

Cologne Köln/Bonn

lun. 7/7

9:35 am-11:25 am

2 stops32h 50m

Chicago O'Hare Intl

vie. 7/18

5:55 pm-8:50 am

2 stops55h 55m

$1,093

CologneSt. Louis

CGN - STL

CGNSTL

Cologne Köln/Bonn

vie. 6/13

6:20 am-7:58 pm

2 stops20h 38m

Lambert-St Louis

vie. 6/20

11:20 am-11:10 am

3 stops16h 50m

$1,118

CologneSt. Louis

CGN - STL

CGNSTL

Cologne Köln/Bonn

jue. 6/12

1:50 am-7:58 pm

3 stops25h 08m

Lambert-St Louis

vie. 6/20

7:30 am-4:55 pm

2 stops26h 25m

$2,871

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 12 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.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 abril 29, 2025.
Read through reviews of airlines operating flights from Cologne to Illinois, such as Austrian Airlines, SWISS and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Austrian Airlines
7.6
Good
780 reviews

Entertainment

6.7

Comfort

7.3

Crew

8.1

Overall

7.6

Boarding

7.6

Food

6.7

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.
Austrian Airlines
7.6
Good
780 reviews
Austrian Airlines
7.6
Good
780 reviews

Entertainment

6.7

Comfort

7.3

Crew

8.1

Overall

7.6

Boarding

7.6

Food

6.7

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.
SWISS
7.5
Good
1,588 reviews
Austrian Airlines
7.6
Good
780 reviews

Entertainment

6.7

Comfort

7.3

Crew

8.1

Overall

7.6

Boarding

7.6

Food

6.7

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.
United Airlines
7.4
Good
8,696 reviews
Austrian Airlines
7.6
Good
780 reviews

Entertainment

6.7

Comfort

7.3

Crew

8.1

Overall

7.6

Boarding

7.6

Food

6.7

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.
Turkish Airlines
7.3
Good
3,788 reviews
Austrian Airlines
7.6
Good
780 reviews

Entertainment

6.7

Comfort

7.3

Crew

8.1

Overall

7.6

Boarding

7.6

Food

6.7

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.
American Airlines
7.2
Good
10,000 reviews
Austrian Airlines
7.6
Good
780 reviews

Entertainment

6.7

Comfort

7.3

Crew

8.1

Overall

7.6

Boarding

7.6

Food

6.7

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.

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.

  • 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 abril 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$855Average$892FlexibilityNo cancel feeOn-time76%

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