$271 Find Cheap Flights from Copenhagen 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 Copenhagen to Illinois departing on 8/11. 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 Copenhagen 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 Copenhagen to Illinois, as well as popular online travel agencies
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Flight Deals

Book Cheap Copenhagen 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 Copenhagen 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 Copenhagen to Illinois

mié., abr. 1 - mié., abr. 15
Multiple Airlines Logo
8:50 am - 5:50 pm
CPH
-
ORD
16h 00m
1 stop
Multiple Airlines Logo
10:30 pm - 11:20 pm
ORD
-
CPH
17h 50m
1 stop
$453Multiple Airlines
mar., abr. 7 - dom., abr. 19
Icelandair Logo
4:55 pm - 6:15 pm
CPH
-
ORD
32h 20m
1 stop
Icelandair Logo
7:25 pm - 12:55 pm
ORD
-
CPH
10h 30m
1 stop
$467Icelandair
mié., abr. 1 - vie., abr. 17
Finnair Logo
7:25 pm - 3:00 pm
CPH
-
ORD
26h 35m
2 stops
Finnair Logo
5:55 pm - 6:40 pm
ORD
-
CPH
17h 45m
2 stops
$478Finnair
mié., abr. 1 - vie., abr. 17
Finnair Logo
7:25 pm - 3:00 pm
CPH
-
ORD
26h 35m
2 stops
Finnair Logo
5:55 pm - 6:40 pm
ORD
-
CPH
17h 45m
2 stops
$479Finnair
vie., abr. 3 - mié., abr. 8
Lufthansa Logo
6:30 am - 1:25 pm
CPH
-
STL
13h 55m
1 stop
Lufthansa Logo
1:10 pm - 4:25 pm
STL
-
CPH
20h 15m
2 stops
$541Lufthansa
mar., abr. 7 - dom., abr. 19
Delta Logo
6:00 am - 6:40 pm
CPH
-
MDW
19h 40m
2 stops
Delta Logo
6:38 pm - 3:45 pm
MDW
-
CPH
14h 07m
2 stops
$564Delta
vie., abr. 3 - mié., abr. 8
Lufthansa Logo
6:00 am - 1:25 pm
CPH
-
STL
14h 25m
2 stops
Lufthansa Logo
1:10 pm - 4:25 pm
STL
-
CPH
20h 15m
2 stops
$566Lufthansa
jue., abr. 9 - lun., abr. 13
United Airlines Logo
6:10 am - 5:36 pm
CPH
-
STL
18h 26m
2 stops
United Airlines Logo
10:00 am - 11:35 am
STL
-
CPH
18h 35m
2 stops
$583United Airlines
jue., abr. 9 - lun., abr. 13
United Airlines Logo
6:10 am - 6:28 pm
CPH
-
STL
19h 18m
2 stops
United Airlines Logo
8:15 pm - 6:05 pm
STL
-
CPH
14h 50m
2 stops
$585United Airlines
dom., abr. 5 - dom., abr. 12
Delta Logo
6:00 am - 5:22 pm
CPH
-
MDW
18h 22m
2 stops
Delta Logo
9:35 am - 8:30 am
MDW
-
CPH
15h 55m
2 stops
$673Delta
Booking Insights

KAYAK's insights & trends for Copenhagen to Illinois flights

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

How much is a round-trip flight from Copenhagen to Illinois?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Copenhagen to Illinois departing in April.

What is the cheapest Copenhagen to Illinois flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Illinois from Copenhagen found in the last 72 hours was to Chicago, at $457 round-trip. The most popular route is from Copenhagen (CPH) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $457.

Can I save money by flying with a layover from Copenhagen to Illinois?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 2 stops layover the cheapest option at $588 on average.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Copenhagen 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 Copenhagen to Illinois is September, when tickets cost $537 (return) on average. On the other hand, the most expensive months are July and June, when the average cost of round-trip tickets is $785 and $725 respectively.

What’s the cheapest day of the week to fly from Copenhagen to Illinois?

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

If you are looking for a flight deal from Copenhagen to Illinois, look for departures on Wednesdays and avoid leaving on a Friday, as it's usually the priciest day. When flying back from Illinois, Wednesday is the cheapest day to fly and Friday is the most expensive.

How far in advance should I book a flight from Copenhagen to Illinois?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Copenhagen to Illinois, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Copenhagen to Illinois, you should book around 4 weeks before departure, which saves you about 31% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$271
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly and prices are also 6% lower on average.
Flight from Copenhagen to Chicago

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Copenhagen 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 Copenhagen to Illinois.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Copenhagen 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 Copenhagen 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 Copenhagen 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 Copenhagen 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 Copenhagen 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 afternoon, when round-trip flights cost $701 on average. Morning departures are around 100% cheaper than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the evening, which is peak travel time and where the average cost of a ticket is $963.

Reviews of the top airlines flying from Copenhagen to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Copenhagen 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 Copenhagen 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 9331 reviews
7.7Boarding
7.1Entertainment
8.1Crew
7.3Comfort
6.6Food
Airline reviews

No real complaints. The in flight food was much better than I expected. The in flight entertainment was excellent.

10.0 ExcellentAnonymous, Feb 2026
AMS - ORD
Read more United Airlines reviews

No real complaints. The in flight food was much better than I expected. The in flight entertainment was excellent.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

Horrible Flight significantly delayed. Not due to united issue. But trying to rebook connection flight and get information about overnight accommodation was difficult. Agent did not seem to care or have any interest to help.

United Airlines is my preferred airlines and I am thankful for Gary who also help support me on the phone to switch my flight literally last min.

This Japanese airline provides great service and very helpful in assisting their passengers.

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

I so appreciate the crew members on each flight of United. They are outstanding.

Reliable, nice crew, I fly often on that flight and I like it all.

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

Curious and efficient service ! First time flying with SAS and very pleased!

Very uncomfortable and cramped seating. Only 1 bathroom for entire economy section, most of the plane. No food provided for a 5.5 hour flight. Bad experience

I wish they have given us explanations for the delays. And the rebooking process in Copenhagen was too long. I had to wait about 4 hours before they assign me a hotel. From there the handling process (accommodation, transportation and meal) was excellent.

Our trip plan from Kayak stated we were flying SAS. That was not true. The first leg was a Delta flight. We wasted 25 minutes before finding out to check in with the correct airline. Then our SAS flight for the second leg arrived 25 minutes late, and our third leg flight with SAS closed the gate knowing the flight delay was SAS’s fault, and that this flight would only be backed up 5 minutes. The final kicker was that between Delta and SAS, they lost all our checked luggage.

Since our earlier flight was delayed, we missed this flight and were rerouted on Lufthansa 2 days later.

Scandinavian Airlines is terrible. Flight was late. Lost luggage. Rude flight attendants. Terrible experience.

The flight was very cold, and the seats were rather uncomfortable. The food has been better on our other SAS experiences. Most significantly, the luggage with most of my wife's personal items and clothes didn't make the flight. Hoping for a quick resolution, but no real opportunity to speak with a Human has us concerned.

Ancient aircraft (busted armrests, poor cabin temperature with no option for passenger control). Garbage everywhere. Risible checking of safely conditions on landing. Also, late.

Feels like economy sits are getting smaller especially while eating food

I was surprised how good an American airline can be - I was really impressed.

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

Information on your arrival and departure airports