400€ Find Cheap Flights from Cologne to Illinois

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 06.09.. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Cologne to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Cologne to Illinois, as well as popular online travel agencies
Travellers love KAYAK
41.299.237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

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

Mon, 15. Jun - Mon, 22. Jun
Multiple Airlines Logo
20:40 - 13:20
CGN
-
ORD
23h 40m
1 stop
Multiple Airlines Logo
18:00 - 17:20
ORD
-
CGN
16h 20m
1 stop
593 €Multiple Airlines
Mon, 15. Jun - Mon, 22. Jun
Multiple Airlines Logo
20:40 - 13:20
CGN
-
ORD
23h 40m
1 stop
Multiple Airlines Logo
21:40 - 17:20
ORD
-
CGN
12h 40m
1 stop
595 €Multiple Airlines
Thu, 18. Jun - Tue, 23. Jun
Lufthansa Logo
8:30 - 14:00
CGN
-
ORD
12h 30m
1 stop
Lufthansa Logo
18:00 - 12:25
ORD
-
CGN
11h 25m
1 stop
598 €Lufthansa
Mon, 15. Jun - Mon, 22. Jun
Lufthansa Logo
20:10 - 14:00
CGN
-
ORD
24h 50m
1 stop
Lufthansa Logo
21:40 - 19:30
ORD
-
CGN
14h 50m
1 stop
604 €Lufthansa
Sat, 22. Aug - Fri, 4. Sep
United Airlines Logo
8:30 - 18:15
CGN
-
ORD
16h 45m
1 stop
United Airlines Logo
10:50 - 12:25
ORD
-
CGN
18h 35m
2 stops
608 €United Airlines
Sun, 23. Aug - Mon, 7. Sep
United Airlines Logo
8:30 - 18:15
CGN
-
ORD
16h 45m
1 stop
United Airlines Logo
12:56 - 12:25
ORD
-
CGN
16h 29m
2 stops
609 €United Airlines
Thu, 18. Jun - Fri, 26. Jun
United Airlines Logo
8:30 - 14:00
CGN
-
ORD
12h 30m
1 stop
United Airlines Logo
18:00 - 17:40
ORD
-
CGN
16h 40m
1 stop
609 €United Airlines
Mon, 15. Jun - Mon, 22. Jun
Air Canada Logo
6:20 - 20:05
CGN
-
ORD
20h 45m
2 stops
Air Canada Logo
8:35 - 17:05
ORD
-
CGN
25h 30m
2 stops
610 €Air Canada
Mon, 15. Jun - Mon, 22. Jun
Air Canada Logo
6:20 - 20:05
CGN
-
ORD
20h 45m
2 stops
Air Canada Logo
15:40 - 17:20
ORD
-
CGN
18h 40m
2 stops
611 €Air Canada
Fri, 21. Aug - Fri, 4. Sep
United Airlines Logo
13:05 - 23:40
CGN
-
ORD
17h 35m
2 stops
United Airlines Logo
10:50 - 12:25
ORD
-
CGN
18h 35m
2 stops
613 €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 May and September, when the average cost of return tickets is 682 € and 603 € respectively.

Good to know - Cheap tickets from Cologne to Illinois

Low seasonFebruary
Cheapest flight400 €
Best time to beat the crowds (27% less expensive on average)
Most popular time to fly (16% more expensive on average)
Flight from Cologne to St. Louis

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 9778 reviews
7,3Comfort
6,6Food
8,1Crew
7,7Boarding
7,1Entertainment
Airline reviews

Boarded early, left early, arrived 40 mins early! A win win for me!

10,0 ExcellentJanice, Jun 2026
IAH - ORD
Read more United Airlines reviews

Boarded early, left early, arrived 40 mins early! A win win for me!

These airplanes should be illegal. The seats are two tight, it is a safety issue. Wheelchair support was ridiculously slow. We almost missed our flight.

This flight is a quick way to get to Chicago, but a bit expensive.

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.

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

Flight crew was super friendly and helpful. Food was frequent and honestly pretty good. Plenty of on-board entertainment. Economy seats are super cramped for such a long flight, but the crew allowed people to get up and stretch, and kids could wander with their parents, so we all made it work. Overall a very good experience.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Starlink is great Crew was polite Business class didn’t get a welcome drink just water and snacks were ok

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

very average service no complimentary alcoholics drinks unlike other airlines such as Porter airlines No decent seats available during check-in time the day before

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

Perfect airline, super friendly, great service, tasty food. Would fly again.

Everything could have been better. What needed to be wrong with United went wrong

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.

Luggage transfer in Chicago was not performed in time. I received my luggage at my destination two days later.

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

Information on your arrival and departure airports