$372 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 10/15. 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

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
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Cheap Flights from Cologne to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
St. Louis
St. Louis2 stops$588
St. Louis
St. Louis2 stops$588

Book Cheap Cologne to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip 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 round-trip flight deals from Cologne to Illinois

Mon, Sep 1 - Sun, Sep 7
Lufthansa Logo
6:05 am - 2:05 pmCGN-ORD
15h 00m1 stop
Lufthansa Logo
9:40 pm - 7:20 pmORD-CGN
14h 40m1 stop
$536Lufthansa
Find Deal
Fri, Sep 5 - Mon, Sep 8
Lufthansa Logo
6:05 am - 2:05 pmCGN-ORD
15h 00m1 stop
Lufthansa Logo
9:40 pm - 3:50 pmORD-CGN
11h 10m1 stop
$540Lufthansa
Find Deal
Sat, Sep 13 - Sat, Sep 20
United Airlines Logo
6:05 am - 7:48 pmCGN-ORD
20h 43m2 stops
United Airlines Logo
5:55 pm - 3:50 pmORD-CGN
14h 55m2 stops
$541United Airlines
Find Deal
Mon, Sep 1 - Sun, Sep 7
 Logo
6:05 am - 2:05 pmCGN-ORD
15h 00m1 stop
 Logo
10:40 am - 3:35 pmORD-CGN
21h 55m2 stops
Mon, Sep 1 - Sun, Sep 7
British Airways Logo
9:15 pm - 1:50 pmCGN-ORD
23h 35m1 stop
British Airways Logo
10:35 pm - 8:25 pmORD-CGN
14h 50m1 stop
$553British Airways
Find Deal
Sat, Sep 13 - Sat, Sep 20
 Logo
10:20 am - 11:50 amCGN-ORD
32h 30m1 stop
 Logo
10:35 pm - 9:45 amORD-CGN
28h 10m1 stop
Mon, Sep 1 - Sun, Sep 7
British Airways Logo
10:50 am - 3:55 pmCGN-ORD
12h 05m1 stop
British Airways Logo
10:35 pm - 2:20 pmORD-CGN
32h 45m1 stop
$560British Airways
Find Deal
Fri, Sep 5 - Mon, Sep 8
Air Canada Logo
7:40 am - 2:55 pmCGN-ORD
14h 15m2 stops
Air Canada Logo
6:20 pm - 5:05 pmORD-CGN
15h 45m2 stops
$567Air Canada
Find Deal
Thu, Sep 25 - Mon, Sep 29
Air Canada Logo
6:35 pm - 7:57 pmCGN-STL
32h 22m2 stops
Air Canada Logo
4:05 pm - 5:20 pmSTL-CGN
18h 15m2 stops
$588Air Canada
Find Deal
Mon, Sep 1 - Sun, Sep 7
United Airlines Logo
6:05 am - 2:55 pmCGN-ORD
15h 50m2 stops
United Airlines Logo
3:35 pm - 12:15 pmORD-CGN
13h 40m1 stop
$592United Airlines
Find Deal
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’s the cheapest day of the week to fly from Cologne to Illinois?

The average price of all round-trip flights from Cologne to Illinois clicked on KAYAK for each day over the last 12 months.

For Cologne to Illinois, Friday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Illinois back to Cologne, the best deals are generally found on Wednesday, with Monday being the most expensive.


Good to know

Low seasonOctober
Cheapest flight$372
Best time to beat the crowds with an average 21% drop in price.
Most popular time to fly with an average 4% increase in price.
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 travelers 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 round-trip 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.

  • What is the cheapest time of day to fly to Illinois?

    The cheapest time of day to fly to Illinois is generally in the morning, when round-trip flights cost $884 on average. The most expensive time of day to fly to Illinois is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $918.

Reviews of the top airline 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.
6.8
LufthansaOverall score based on 7269 reviews
6.4Entertainment
7.0Boarding
6.3Food
7.6Crew
6.8Comfort
Airline reviews

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.

8.0 ExcellentAnita, Jul 2025FRA - ORD
Read more Lufthansa reviews

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.

I meant this flight was not good, the one from Tirana to Frankfurt was better!

I was very grateful for Lufthansa's role in organizing mobility support. The touchscreen on my seat was faulty: slow, stained (I couldn't get it clean), and glitchy. This made selecting movies extremely time consuming, and twice I had to start all over from the beginning.

The crew was the best I’ve ever encountered. Business class was spacious, immaculate, and very modern.

I wish seats were not reclinable. It's so claustrophobic when the person in front of you spends most of a nine hour flight leaned all the way back. The crew was really nice though and the dinner (red Thai curry) was pretty compelling.

Our flights were severely delayed, then canceled and we had to fly out next day with no sleep accommodation help. This led to our baggage being lost and the service reps after baggage couldn’t be bothered to help. They kept sending us to different counters when we were at the right counter to begin with. The only saving grace was the angel woman supervisor with blond hair who helped us put in a missing baggage claim.

The boarding system was all bogus - employees at the boarding gate were not sound like proffesional or may be possibly rational

I got an email in the morning of the flight 1/7, from Kayak, that I was rebooked from UA 906 to LH 430. Nobody at Lufthansa ot United knew about this. I went to both counters. at the airport. Also, Cheap Flights, who I booked the ticket through, did not know. I ended up staying on the United flight. But this was very disturbing, since I got a very late notice that I was rebooked to an earlier flight, I hurried to the airport to find out after a lot of inquiring that this was a mistake. Not a good Kayak experience.

After living in Europe for five years and flying with Lufthansa and KLM airlines, I’ve realized that United Airlines is now a budget carrier. The flight attendant are not friendly. The seats are not comfortable. And everything comes at a cost. I will be flying with KLM and Skyteam like Delta to the US going forward no doubt. United Airlines is not what it once was:

Delayed take off but I think they waited for passengers.

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

Information on your arrival and departure airports

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