How long is the flight from Illinois to Cologne?

Airlines like Lufthansa, British Airways, and Turkish Airlines fly from Illinois to Cologne in about 16h 24m. The time it takes to get you to your destination can typically vary by up to 10h 16m. The distance between Illinois and Cologne is about 4494 mi. This flight may include one or multiple stops.

In terms of precipitation, rainfall in Cologne ranges from 2.0 - 3.5 inches per month. June is typically the wettest month, when rainfall can reach 3.5 in. February is typically the driest time to visit Cologne when rainfall is around 2.0 in.

If weather is an important factor for your trip to Cologne, 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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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.

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.

$516+ Flights from Illinois to Cologne

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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 18, 2025.

Thu 12/253:55 pmORD - CGN

2 stops23h 05mMultiple Airlines

Tue 12/3012:50 amCGN - ORD

1 stop24h 35mMultiple Airlines

Deal found 12/16

$1,422

Thu 12/258:20 pmORD - CGN

1 stop31h 15mTurkish Airlines

Wed 12/316:15 pmCGN - ORD

1 stop22h 50mTurkish Airlines

Deal found 12/16

$1,528

Thu 12/251:24 pmORD - CGN

2 stops25h 36mAustrian Airlines

Wed 12/316:50 amCGN - ORD

1 stop14h 10mAustrian Airlines

Deal found 12/16

$1,754

Sat 12/208:20 pmORD - CGN

1 stop31h 15mTurkish Airlines

Mon 12/226:15 pmCGN - ORD

1 stop22h 50mTurkish Airlines

Deal found 12/16

$1,950

Sat 12/205:50 pmORD - CGN

2 stops21h 15mMultiple Airlines

Mon 12/226:15 pmCGN - ORD

1 stop22h 50mMultiple Airlines

Deal found 12/16

$2,391

Sat 12/2011:50 amORD - CGN

2 stops20h 50mBritish Airways

Mon 12/225:15 pmCGN - ORD

2 stops31h 40mBritish Airways

Deal found 12/16

$2,866

Best flights from Illinois to Cologne
Discover carefully curated flight deals from Illinois to Cologne that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 18, 2025.

Tue 2/2411:39 amSTL - CGN

2 stops17h 56mLufthansa

Sun 3/11:15 pmCGN - STL

2 stops17h 50mLufthansa

Deal found 12/16

$558

Thu 3/56:00 amSTL - CGN

2 stops26h 40mBritish Airways

Mon 3/165:15 pmCGN - STL

2 stops36h 37mBritish Airways

Deal found 12/16

$572

Wed 4/2211:25 amORD - CGN

1 stop19h 25mTurkish Airlines

Tue 4/287:10 pmCGN - ORD

1 stop21h 30mTurkish Airlines

Deal found 12/17

$671

Sat 1/314:49 pmSTL - CGN

2 stops17h 21mUnited Airlines

Sat 2/79:10 amCGN - STL

2 stops21h 49mUnited Airlines

Deal found 12/17

$776

Thu 3/54:05 pmSTL - CGN

2 stops17h 15mAir Canada

Mon 3/168:40 amCGN - STL

3 stops18h 27mAir Canada

Deal found 12/16

$897

Fri 1/3011:44 amORD - CGN

2 stops21h 36mBritish Airways

Fri 2/64:35 pmCGN - ORD

2 stops29h 13mBritish Airways

Deal found 12/16

$671

Sun 4/1911:25 amORD - CGN

1 stop15h 05mTurkish Airlines

Thu 4/302:50 pmCGN - ORD

1 stop25h 50mTurkish Airlines

Deal found 12/17

$673

Wed 2/113:27 pmORD - CGN

2 stops17h 43mBritish Airways

Wed 2/185:15 pmCGN - ORD

2 stops33h 34mBritish Airways

Deal found 12/17

$672

Thu 4/3011:25 amORD - CGN

1 stop23h 45mTurkish Airlines

Mon 5/42:50 pmCGN - ORD

1 stop25h 50mTurkish Airlines

Deal found 12/16

$680

Sun 4/197:50 pmORD - CGN

1 stop30h 40mTurkish Airlines

Tue 4/2810:30 amCGN - ORD

1 stop38h 45mTurkish Airlines

Deal found 12/17

$691

Fri 1/304:49 pmSTL - CGN

2 stops17h 21mUnited Airlines

Tue 2/36:45 amCGN - STL

2 stops21h 28mUnited Airlines

Deal found 12/15

$885

Thu 4/2311:25 amORD - CGN

1 stop15h 05mTurkish Airlines

Mon 4/2710:30 amCGN - ORD

1 stop30h 10mTurkish Airlines

Deal found 12/17

$711

Sat 4/1811:25 amORD - CGN

1 stop15h 05mTurkish Airlines

Wed 4/2910:30 amCGN - ORD

1 stop30h 10mTurkish Airlines

Deal found 12/17

$711

Fri 4/177:50 pmORD - CGN

1 stop15h 20mTurkish Airlines

Wed 4/2910:30 amCGN - ORD

1 stop30h 10mTurkish Airlines

Deal found 12/17

$711

Fri 4/1711:25 amORD - CGN

1 stop23h 45mTurkish Airlines

Fri 5/110:30 amCGN - ORD

1 stop38h 45mTurkish Airlines

Deal found 12/17

$711

Wed 4/2211:25 amORD - CGN

1 stop23h 45mTurkish Airlines

Mon 4/272:50 pmCGN - ORD

1 stop25h 50mTurkish Airlines

Deal found 12/17

$711

Thu 3/2612:50 pmORD - CGN

1 stop22h 25mTurkish Airlines

Fri 4/37:10 pmCGN - ORD

1 stop21h 30mTurkish Airlines

Deal found 12/16

$714

Last-minute flights from Illinois to Cologne
Discover last-minute flight deals from Illinois to Cologne. Data last updated December 18, 2025 and is based on user searches.

Sun 1/256:30 pmORD - CGN

2 stops13h 25mMultiple Airlines

Fri 1/3011:55 amCGN - ORD

3 stops41h 47mMultiple Airlines

Deal found 12/16

$682

Thu 1/298:20 pmORD - CGN

1 stop31h 15mTurkish Airlines

Mon 2/26:15 pmCGN - ORD

1 stop31h 10mTurkish Airlines

Deal found 12/16

$716

Fri 1/308:20 pmORD - CGN

1 stop37h 55mTurkish Airlines

Fri 2/66:15 pmCGN - ORD

1 stop22h 50mTurkish Airlines

Deal found 12/16

$652

Fri 1/3011:44 amORD - CGN

2 stops21h 36mBritish Airways

Fri 2/64:35 pmCGN - ORD

2 stops29h 13mBritish Airways

Deal found 12/16

$671

Fri 1/306:30 pmORD - CGN

2 stops16h 30mMultiple Airlines

Fri 2/611:55 amCGN - ORD

3 stops41h 47mMultiple Airlines

Deal found 12/16

$709

Fri 1/304:49 pmSTL - CGN

2 stops17h 21mUnited Airlines

Tue 2/36:45 amCGN - STL

2 stops21h 28mUnited Airlines

Deal found 12/15

$885

Sat 1/318:18 pmORD - CGN

2 stops37h 12mBritish Airways

Sat 2/75:10 pmCGN - ORD

1 stop27h 40mBritish Airways

Deal found 12/17

$619

Sat 1/318:20 pmORD - CGN

1 stop31h 15mTurkish Airlines

Sat 2/76:15 pmCGN - ORD

1 stop31h 10mTurkish Airlines

Deal found 12/17

$704

Sat 1/316:30 pmORD - CGN

2 stops20h 50mMultiple Airlines

Sat 2/77:45 pmCGN - ORD

3 stops28h 35mMultiple Airlines

Deal found 12/17

$741

Sat 1/314:49 pmSTL - CGN

2 stops17h 21mUnited Airlines

Sat 2/79:10 amCGN - STL

2 stops21h 49mUnited Airlines

Deal found 12/17

$776

One-way flights from Illinois to Cologne
Search for one-way flight options from Illinois to Cologne. Find affordable one-way fares based on user searches. Data last updated December 18, 2025.

Sat 5/211:25 amORD - CGN

1 stop15h 05mTurkish Airlines

Deal found 12/16

$516

Thu 4/3011:25 amORD - CGN

1 stop23h 45mTurkish Airlines

Deal found 12/16

$518

Sat 5/25:35 pmORD - CGN

2 stops34h 35mAir Canada

Deal found 12/16

$708

Thu 4/3010:53 amORD - CGN

2 stops17h 17mAir Canada

Deal found 12/16

$759

Sat 1/179:00 pmORD - CGN

2 stops18h 25mMultiple Airlines

Deal found 12/17

$2,254

Sat 1/1711:50 amORD - CGN

1 stop22h 25mTurkish Airlines

Deal found 12/16

$2,523

Sat 5/27:10 amORD - CGN

3 stops45h 00mMultiple Airlines

Deal found 12/16

$8,172

Find flight deals from Illinois to Cologne

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$557 (Cheapflightsfares)
One-way from	$516 (FlightHub)
Popular in	November
Cheapest in	February
Average price	$697

Provider with most accurate pricing for Chicago (CHI)-Cologne Köln/Bonn flight deals.

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Provider most trusted by Cheapflights users for Chicago (CHI)-Cologne Köln/Bonn flights.

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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

Fly from

Fly to

Route

Depart

Return

Price

St. LouisCologne

STL - CGN

STLCGN

Lambert-St Louis

Tue 2/24

11:39 am-12:35 pm

2 stops17h 56m

Cologne Köln/Bonn

Sun 3/1

1:15 pm-12:05 am

2 stops17h 50m

$558

St. LouisCologne

STL - CGN

STLCGN

Lambert-St Louis

Thu 3/5

6:00 am-3:40 pm

2 stops26h 40m

Cologne Köln/Bonn

Mon 3/16

5:15 pm-11:52 pm

2 stops36h 37m

$572

ChicagoCologne

ORD - CGN

ORDCGN

Chicago O'Hare Intl

Wed 4/22

11:25 am-1:50 pm

1 stop19h 25m

Cologne Köln/Bonn

Tue 4/28

7:10 pm-9:40 am

1 stop21h 30m

$671

ChicagoCologne

ORD - CGN

ORDCGN

Chicago O'Hare Intl

Fri 1/30

11:44 am-4:20 pm

2 stops21h 36m

Cologne Köln/Bonn

Fri 2/6

4:35 pm-2:48 pm

2 stops29h 13m

$671

ChicagoCologne

ORD - CGN

ORDCGN

Chicago O'Hare Intl

Wed 2/11

3:27 pm-4:10 pm

2 stops17h 43m

Cologne Köln/Bonn

Wed 2/18

5:15 pm-7:49 pm

2 stops33h 34m

$672

ChicagoCologne

ORD - CGN

ORDCGN

Chicago O'Hare Intl

Sun 4/19

11:25 am-9:30 am

1 stop15h 05m

Cologne Köln/Bonn

Thu 4/30

2:50 pm-9:40 am

1 stop25h 50m

$673

ChicagoCologne

ORD - CGN

ORDCGN

Chicago O'Hare Intl

Thu 4/30

11:25 am-6:10 pm

1 stop23h 45m

Cologne Köln/Bonn

Mon 5/4

2:50 pm-9:40 am

1 stop25h 50m

$680

ChicagoCologne

ORD - CGN

ORDCGN

Chicago O'Hare Intl

Sun 4/19

7:50 pm-9:30 am

1 stop30h 40m

Cologne Köln/Bonn

Tue 4/28

10:30 am-6:15 pm

1 stop38h 45m

$691

ChicagoCologne

ORD - CGN

ORDCGN

Chicago O'Hare Intl

Thu 4/23

11:25 am-9:30 am

1 stop15h 05m

Cologne Köln/Bonn

Mon 4/27

10:30 am-9:40 am

1 stop30h 10m

$711

ChicagoCologne

ORD - CGN

ORDCGN

Chicago O'Hare Intl

Sat 4/18

11:25 am-9:30 am

1 stop15h 05m

Cologne Köln/Bonn

Wed 4/29

10:30 am-9:40 am

1 stop30h 10m

$711

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 23 results

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?

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

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, British Airways, and Turkish Airlines fly from Illinois to Cologne in about 16h 24m. The time it takes to get you to your destination can typically vary by up to 10h 16m. 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

Top airline flying from Illinois to Cologne

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest$584	Average$762	FlexibilityNo cancel fee	On-time70%

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$516+ 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 5/2. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Illinois to Cologne with Cheapflights

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Cheap flight deals from Illinois to Cologne

Cheapest flights from Illinois to CologneExplore 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 18, 2025.

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 18, 2025.

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 18, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to Cologne that are best for you.

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.

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?

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 18, 2025.

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?

How long is the flight from Illinois to Cologne?

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

How can I find direct flights from Illinois to Cologne?

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

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

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Alternative routes for Illinois to Cologne

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Top airline flying from Illinois to Cologne

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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 18, 2025.