$355 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 8/25. 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

Thu, Apr 30 - Wed, Jun 24
Icelandair Logo
2:00 pm - 6:15 pm
CPH
-
ORD
11h 15m
1 stop
Icelandair Logo
10:25 pm - 9:45 pm
ORD
-
CPH
16h 20m
1 stop
$496Icelandair
Wed, May 20 - Wed, May 27
Icelandair Logo
4:55 pm - 9:25 pm
CPH
-
ORD
11h 30m
1 stop
Icelandair Logo
7:25 pm - 6:20 am
ORD
-
CPH
27h 55m
1 stop
$500Icelandair
Mon, May 18 - Mon, May 25
Finnair Logo
6:45 am - 5:50 pm
CPH
-
ORD
18h 05m
1 stop
Finnair Logo
9:30 pm - 8:20 pm
ORD
-
CPH
15h 50m
1 stop
$502Finnair
Sat, May 2 - Tue, Jun 2
British Airways Logo
7:50 pm - 6:15 pm
CPH
-
ORD
29h 25m
1 stop
British Airways Logo
4:29 pm - 7:15 pm
ORD
-
CPH
19h 46m
2 stops
$510British Airways
Tue, Sep 1 - Sat, Sep 12
Multiple Airlines Logo
5:40 pm - 7:25 am
CPH
-
ORD
20h 45m
2 stops
Multiple Airlines Logo
1:59 pm - 11:05 am
ORD
-
CPH
14h 06m
2 stops
$511Multiple Airlines
Sat, May 2 - Tue, Jun 2
British Airways Logo
7:50 pm - 6:15 pm
CPH
-
ORD
29h 25m
1 stop
British Airways Logo
4:29 pm - 7:15 pm
ORD
-
CPH
19h 46m
2 stops
$512British Airways
Mon, May 4 - Tue, May 12
Finnair Logo
8:50 am - 10:17 pm
CPH
-
STL
20h 27m
2 stops
Finnair Logo
12:27 pm - 1:10 pm
STL
-
CPH
17h 43m
2 stops
$619Finnair
Sat, May 23 - Wed, May 27
Multiple Airlines Logo
8:50 am - 6:30 pm
CPH
-
STL
16h 40m
2 stops
Multiple Airlines Logo
9:35 pm - 11:20 pm
STL
-
CPH
18h 45m
1 stop
$625Multiple Airlines
Sat, May 23 - Wed, May 27
Lufthansa Logo
6:40 am - 7:26 pm
CPH
-
STL
19h 46m
2 stops
Lufthansa Logo
8:35 am - 9:25 am
STL
-
CPH
17h 50m
2 stops
$626Lufthansa
Fri, May 1 - Fri, May 8
Lufthansa Logo
6:30 am - 1:25 pm
CPH
-
STL
13h 55m
1 stop
Lufthansa Logo
1:24 pm - 6:00 pm
STL
-
CPH
21h 36m
2 stops
$661Lufthansa
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 $534 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 $534.

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

The average price for all round-trip flights from Copenhagen to Illinois depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Illinois is generally in the afternoon, when round-trip flights cost $700 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 $1,067.

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 1 stop layover the cheapest option at $596 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 February, when tickets cost $541 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $827 and $800 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 Sunday, 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 30% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 20 weeks before departure.

Find deals

Good to know

Low seasonJanuary
Cheapest flight$355
Best time to beat the crowds but there is an average 2% increase in price.
Most popular time to fly and prices are also 4% 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.

Reviews of the top airline 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.
7.3
Scandinavian AirlinesOverall score based on 1742 reviews
8.0Crew
6.7Entertainment
6.7Food
7.6Boarding
7.3Comfort
Airline reviews

Excellent crew members, but my seat and food wasn’t the best

6.0 GoodAnonymous, Mar 2026
CPH - PRG
Read more Scandinavian Airlines reviews

Excellent crew members, but my seat and food wasn’t the best

All went smoothly. That's what I want on a long flight.

I expected more, but they will nickel and dime you for everything. I did not enjoy flying with this airline.

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.

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

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

Information on your arrival and departure airports

Copenhagen (CPH)