How long is the flight from Illinois to Cologne?

Airlines like Lufthansa, British Airways, and Turkish Airlines fly from Illinois to Cologne in about 15h 45m. The time it takes to get you to your destination can typically vary by up to 10h 55m. The distance between Illinois and Cologne is about 4244 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 is the cheapest time of day to fly from IL to CGN?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Cologne as you normally would.

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.

$233+ 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 diciembre 27, 2025.

mar. 12/308:20 pmORD - CGN

1 stop31h 15mTurkish Airlines

sáb. 1/36:15 pmCGN - ORD

1 stop31h 10mTurkish Airlines

Deal found 12/25

$5,757

mar. 12/301:54 pmORD - CGN

2 stops19h 36mBritish Airways

sáb. 1/312:40 pmCGN - ORD

2 stops37h 44mBritish Airways

Deal found 12/25

$7,773

mar. 12/304:46 pmORD - CGN

3 stops46h 39mMultiple Airlines

sáb. 1/38:40 amCGN - ORD

2 stops35h 15mMultiple Airlines

Deal found 12/26

$38,773

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 diciembre 27, 2025.

mar. 2/2411:39 amSTL - CGN

2 stops17h 56mLufthansa

dom. 3/19:10 amCGN - STL

2 stops19h 30mLufthansa

Deal found 12/25

$559

jue. 3/56:00 amSTL - CGN

2 stops26h 40mBritish Airways

lun. 3/165:15 pmCGN - STL

2 stops36h 37mBritish Airways

Deal found 12/25

$573

lun. 1/1911:50 amORD - CGN

1 stop15h 45mTurkish Airlines

mar. 2/311:35 amCGN - ORD

1 stop37h 50mTurkish Airlines

Deal found 12/26

$621

jue. 1/153:35 pmORD - CGN

2 stops17h 20mMultiple Airlines

lun. 1/196:10 pmCGN - ORD

2 stops31h 15mMultiple Airlines

Deal found 12/25

$729

mié. 1/143:11 pmSTL - CGN

2 stops13h 59mUnited Airlines

dom. 1/181:40 pmCGN - STL

2 stops17h 19mUnited Airlines

Deal found 12/24

$986

jue. 2/265:10 pmORD - CGN

1 stop15h 30mBritish Airways

lun. 3/25:15 pmCGN - ORD

1 stop32h 30mBritish Airways

Deal found 12/25

$702

jue. 2/1211:41 amORD - CGN

2 stops20h 59mBritish Airways

mar. 2/175:05 pmCGN - ORD

2 stops31h 57mBritish Airways

Deal found 12/24

$705

lun. 1/196:30 pmORD - CGN

2 stops20h 55mMultiple Airlines

mar. 2/38:40 amCGN - ORD

2 stops15h 40mMultiple Airlines

Deal found 12/26

$776

mar. 2/2411:25 amSTL - CGN

3 stops17h 45mMultiple Airlines

dom. 3/11:40 pmCGN - STL

2 stops32h 49mMultiple Airlines

Deal found 12/25

$790

jue. 1/1511:43 amORD - CGN

2 stops20h 57mBritish Airways

lun. 1/195:15 pmCGN - ORD

2 stops33h 49mBritish Airways

Deal found 12/25

$852

lun. 3/235:20 pmORD - CGN

1 stop11h 15mMultiple Airlines

lun. 3/301:00 pmCGN - ORD

1 stop12h 15mMultiple Airlines

Deal found 12/26

$862

Last-minute flights from Illinois to Cologne
Discover last-minute flight deals from Illinois to Cologne. Data last updated diciembre 27, 2025 and is based on user searches.

mié. 1/143:11 pmSTL - CGN

2 stops13h 59mUnited Airlines

dom. 1/181:40 pmCGN - STL

2 stops17h 19mUnited Airlines

Deal found 12/24

$986

jue. 1/153:35 pmORD - CGN

2 stops17h 20mMultiple Airlines

lun. 1/196:10 pmCGN - ORD

2 stops31h 15mMultiple Airlines

Deal found 12/25

$729

jue. 1/155:10 pmORD - CGN

1 stop15h 30mBritish Airways

lun. 1/195:15 pmCGN - ORD

1 stop27h 35mBritish Airways

Deal found 12/25

$833

lun. 1/1911:50 amORD - CGN

1 stop15h 45mTurkish Airlines

mar. 2/311:35 amCGN - ORD

1 stop37h 50mTurkish Airlines

Deal found 12/26

$621

lun. 1/196:30 pmORD - CGN

2 stops20h 55mMultiple Airlines

mar. 2/38:40 amCGN - ORD

2 stops15h 40mMultiple Airlines

Deal found 12/26

$776

lun. 1/193:55 pmORD - CGN

2 stops13h 15mAir Canada

mar. 2/38:40 amCGN - ORD

2 stops16h 08mAir Canada

Deal found 12/25

$1,002

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 diciembre 27, 2025.

vie. 2/611:45 amORD - CGN

2 stops26h 20mMultiple Airlines

Deal found 12/25

$233

lun. 1/268:20 pmORD - CGN

1 stop31h 15mTurkish Airlines

Deal found 12/26

$521

dom. 1/259:45 pmORD - CGN

1 stop11h 45mBritish Airways

Deal found 12/26

$530

lun. 1/262:50 pmORD - CGN

2 stops18h 20mMultiple Airlines

Deal found 12/26

$535

vie. 1/911:50 amORD - CGN

1 stop15h 45mTurkish Airlines

Deal found 12/25

$543

mié. 1/281:55 pmORD - CGN

2 stops25h 30mAir Canada

Deal found 12/26

$563

sáb. 1/245:52 pmORD - CGN

2 stops35h 18mAir Canada

Deal found 12/26

$566

sáb. 1/249:45 pmORD - CGN

1 stop10h 55mBritish Airways

Deal found 12/26

$580

Find flight deals from Illinois to Cologne

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$559 (Cheapflightsfares)
One-way from	$233 (Kiwi.com)
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

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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

mar. 2/24

11:39 am-12:35 pm

2 stops17h 56m

Cologne Köln/Bonn

dom. 3/1

9:10 am-9:40 pm

2 stops19h 30m

$559

St. LouisCologne

STL - CGN

STLCGN

Lambert-St Louis

jue. 3/5

6:00 am-3:40 pm

2 stops26h 40m

Cologne Köln/Bonn

lun. 3/16

5:15 pm-11:52 pm

2 stops36h 37m

$573

ChicagoCologne

ORD - CGN

ORDCGN

Chicago O'Hare Intl

lun. 1/19

11:50 am-10:35 am

1 stop15h 45m

Cologne Köln/Bonn

mar. 2/3

11:35 am-6:25 pm

1 stop37h 50m

$621

ChicagoCologne

ORD - CGN

ORDCGN

Chicago O'Hare Intl

jue. 2/26

5:10 pm-3:40 pm

1 stop15h 30m

Cologne Köln/Bonn

lun. 3/2

5:15 pm-6:45 pm

1 stop32h 30m

$702

ChicagoCologne

ORD - CGN

ORDCGN

Chicago O'Hare Intl

jue. 2/12

11:41 am-3:40 pm

2 stops20h 59m

Cologne Köln/Bonn

mar. 2/17

5:05 pm-6:02 pm

2 stops31h 57m

$705

ChicagoCologne

ORD - CGN

ORDCGN

Chicago O'Hare Intl

jue. 1/15

3:35 pm-3:55 pm

2 stops17h 20m

Cologne Köln/Bonn

lun. 1/19

6:10 pm-6:25 pm

2 stops31h 15m

$729

ChicagoCologne

ORD - CGN

ORDCGN

Chicago O'Hare Intl

lun. 1/19

6:30 pm-10:25 pm

2 stops20h 55m

Cologne Köln/Bonn

mar. 2/3

8:40 am-5:20 pm

2 stops15h 40m

$776

St. LouisCologne

STL - CGN

STLCGN

Lambert-St Louis

mar. 2/24

11:25 am-12:10 pm

3 stops17h 45m

Cologne Köln/Bonn

dom. 3/1

1:40 pm-3:29 pm

2 stops32h 49m

$790

ChicagoCologne

ORD - CGN

ORDCGN

Chicago O'Hare Intl

jue. 1/15

11:43 am-3:40 pm

2 stops20h 57m

Cologne Köln/Bonn

lun. 1/19

5:15 pm-8:04 pm

2 stops33h 49m

$852

ChicagoCologne

ORD - CGN

ORDCGN

Chicago O'Hare Intl

lun. 3/23

5:20 pm-10:35 am

1 stop11h 15m

Cologne Köln/Bonn

lun. 3/30

1:00 pm-6:15 pm

1 stop12h 15m

$862

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/25

Showing 1-10 of 17 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.

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 15h 45m. The time it takes to get you to your destination can typically vary by up to 10h 55m. The distance between Illinois and Cologne is about 4244 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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$233+ 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 2/6. 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 diciembre 27, 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 diciembre 27, 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 diciembre 27, 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?

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 diciembre 27, 2025.