382€ Find Cheap Flights from Cologne to Illinois – Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Cologne to Illinois departing on 25.09.. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Cologne to Illinois

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Cologne to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Cologne to Illinois

Tue, 25. Aug - Mon, 31. Aug
Lufthansa Logo
13:05 - 18:15
CGN
-
ORD
12h 10m
1 stop
Lufthansa Logo
18:00 - 17:20
ORD
-
CGN
16h 20m
1 stop
574 €Lufthansa
Thu, 20. Aug - Sun, 30. Aug
Lufthansa Logo
20:10 - 14:00
CGN
-
ORD
24h 50m
1 stop
Lufthansa Logo
18:00 - 17:20
ORD
-
CGN
16h 20m
1 stop
582 €Lufthansa
Fri, 4. Sep - Fri, 11. Sep
Lufthansa Logo
20:10 - 12:35
CGN
-
ORD
23h 25m
1 stop
Lufthansa Logo
18:00 - 17:40
ORD
-
CGN
16h 40m
1 stop
585 €Lufthansa
Fri, 4. Sep - Tue, 8. Sep
Lufthansa Logo
13:05 - 18:15
CGN
-
ORD
12h 10m
1 stop
Lufthansa Logo
18:00 - 12:25
ORD
-
CGN
11h 25m
1 stop
587 €Lufthansa
Thu, 10. Sep - Wed, 16. Sep
Multiple Airlines Logo
13:05 - 18:15
CGN
-
ORD
12h 10m
1 stop
Multiple Airlines Logo
12:55 - 19:55
ORD
-
CGN
24h 00m
2 stops
591 €Multiple Airlines
Thu, 20. Aug - Tue, 8. Sep
Multiple Airlines Logo
8:30 - 14:00
CGN
-
ORD
12h 30m
1 stop
Multiple Airlines Logo
16:20 - 19:55
ORD
-
CGN
20h 35m
1 stop
594 €Multiple Airlines
Thu, 22. Oct - Mon, 2. Nov
Air Canada Logo
8:30 - 20:00
CGN
-
STL
18h 30m
2 stops
Air Canada Logo
13:08 - 12:50
STL
-
CGN
16h 42m
3 stops
730 €Air Canada
Thu, 22. Oct - Mon, 2. Nov
Air Canada Logo
13:05 - 22:59
CGN
-
STL
16h 54m
3 stops
Air Canada Logo
13:08 - 12:50
STL
-
CGN
16h 42m
3 stops
802 €Air Canada
Sat, 14. Nov - Tue, 17. Nov
United Airlines Logo
9:10 - 21:13
CGN
-
STL
19h 03m
2 stops
United Airlines Logo
19:04 - 17:15
STL
-
CGN
15h 11m
2 stops
1.328 €United Airlines
Sat, 14. Nov - Tue, 17. Nov
United Airlines Logo
9:10 - 21:13
CGN
-
STL
19h 03m
2 stops
United Airlines Logo
19:04 - 17:15
STL
-
CGN
15h 11m
2 stops
1.329 €United Airlines
Booking Insights

KAYAK's insights & trends for Cologne to Illinois flights

Get data-powered insights and trends into flights from Cologne to Illinois to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Cologne to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Cologne to Illinois, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Cologne to Illinois is January, when tickets cost 0 € (return) on average. On the other hand, the most expensive months are July and August, when the average cost of return tickets is 1.369 € and 775 € respectively.

Good to know - Cheap tickets from Cologne to Illinois

Low season

February

Cheapest flight

382 €
Best time to beat the crowds (37% less expensive on average)
Most popular time to fly (17% more expensive on average)
Flight from Cologne to Chicago

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Cologne to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Cologne to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Cologne to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Cologne to Illinois is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Cologne to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from Cologne to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Cologne to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Cologne to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Cologne to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Cologne to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Cologne to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7,4
United AirlinesOverall score based on 10014 reviews
6,6Food
7,1Entertainment
7,7Boarding
8,1Crew
7,3Comfort
Airline reviews

Food was not great. Small seating area for business class

6,0 GoodRuss, Jul 2026
MUC - ORD
Read more United Airlines reviews

Food was not great. Small seating area for business class

The clerk at check in for my bags was very rude. My credit card was hacked during my vacation and she told me it was not possible to pay in cash for my bag. “You bought the cheapest ticket, you should have bought a ticket that included a bag. If you cannot pay with a credit card, we will not let you on this flight”. She spoke to her supervisor and then told me , I could ask other passengers, if they would use their credit card to check my bag. I had to beg 5 different people, till one agreed to use their credit card. I payed them cash of course. This was a very stressful and humiliating experience for me. I strongly suggest you build in some kind of provision for travelers who got robbed.

The crew was generally professional. Though one of the crew members seemed to be easily annoyed, the others were fine and helpful. The green olives and almonds snack was really good. A great idea, and nice balance of tastes.

Would've been great if Lufthansa union cockpit pilots didn't strike for 2 days and caused a chaos to my returning plans to USA, and then after rebooking a flight 2 days later tge plane departed 35 min later. So I did not have a good experience.

An international flight on an apron is pretty unusual in my 40 years of traveling. Departure delay. Luggage despite over an hour connection did not make it to the flight. Actually still in Germany. My luggage was not moved until I reached my final destination despite knowing it to be left in Germany upon my arrival in Chicago. The service left me a little off, both going and returning from Europe. Light on in the cabin even during a night flight and lots of traffic no matter what. Maybe passengers want more service? As a frequent traveler i just want to be able to sleep, the food will be better at the destination anyway. So since the cabin crew woke me up I asked for a cocktail, I did not get the best response although sitting in row 20 premium economy. I usually fly premium economy or business and my 2 flight to Europe in 2025 with United both had luggage delays and other minor issues. American flights to Australia, Canada and Europe went smoothly and Premium plus feels very much like business light. Is United Club becoming a waste and Silver/Gold levels another waste??

This flight leg was fantastic - super comfortable and a great selection of things to watch on the TV. Staff were excellent, really above and beyond.

Could have said yes to a glass of wine 🍷 instead of saying we'll come around in a couple of hours

Inoperable monitor left no entert for 9 hours. Crew was not helpful Food was awful.

We were delayed an hour leaving Munich (No fault of the crew). They kept us posted on the status so we knew what was going on, but as a result we missed our connection in Chicago and the communication on connecting flights was pretty poor as we disembarked. It was already stressful and some of that could have been reduced by better communications about where to find transfers, etc.

One problem, but a serious one - the plane is built with electric windows that tint dark to reduce light. Sitting next to the window is VERY UNCOMFORTABLE as it emits so much HEAT in the face when tinted.

The legroom was lacking and the entertainment system lacked adequate selection of older films. Modern films are generally not very good.

It was good. The seats in economy weren’t bad

Very good. Comfortable and I felt well taken care of from start to finish

We were in premium economy seats that appeared to be locked in plae, No reclining. My aching back.

I don’t understand how they charge as much as they do for such a poor experience

I wish the plane had pod seating for business class. I had a window seat (8K) and I had to climb over the person sitting on the aisle when I needed to get up. Also there is no partition between the seats for privacy when sleeping. The Asian airlines have much nicer business class seating. Their seats are wider for better comfort when sleeping.

The seat space seemed small especially when the person ahead reclined but other than that, very good.

Food was poor quality and the screens for entertainment didn’t work properly

I darted through the Frankfurt airport to make my connecting flight. I asked if it was a possibility to upgrade and the agent did. This was the kindest gesture and it made up for the previous delayed flight and distress/anxiety of anticipating that Zi was going to miss my Frankfurt-Chicago connection. I cannot express my gratitude for the upgrade.. I am 5feet 10 inches do the leg space was amazing.

Didn't have bar code on our phone based boarding pass. People at the counter didn't notice. We walked to security, couldn't get through, had to go back to check in to get a paper boarding pass.

Everything you need to know for your flight from Cologne to Illinois

Information on your arrival and departure airports