$330 Find Cheap Flights from Denmark to Illinois

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 for flights to Illinois
These are the airlines KAYAK users have selected most often from within our search results for flights to Illinois
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Useful Info

What is the cheapest flight to Illinois?

These are the best round-trip prices found by users searching on KAYAK in the last 72 hours.

The cheapest ticket to Illinois from Denmark found in the last 72 hours was to Chicago O'Hare Intl Airport, at $707 round-trip. The most popular route is 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 $707.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Denmark 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 Denmark to Illinois is January, when tickets cost $495 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $856 and $789 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights 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 Denmark to Illinois, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Which is the cheapest airport to fly into in Illinois?

Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Illinois is Chicago O'Hare Intl Airport (ORD), with an average flight price of $860.


Good to know

Low seasonJanuary
High seasonJuly
Cheapest flight$330
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly with an average 31% increase in price.
Flight from Copenhagen to Chicago

FAQs for booking flights from Denmark to Illinois

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

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Denmark 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 Denmark 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 Denmark 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 Denmark 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 Denmark 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 day to fly to Illinois?

    Based on KAYAK data, the cheapest day to fly to Illinois is Saturday where round-trip tickets can be as cheap as $573. On the other hand, the most expensive day to fly is Friday, where round-trip prices are $714 on average.

  • 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 $532 on average. Morning departures are around 30% 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 $746.

Reviews of the top 5 airlines serving from Denmark to Illinois

 
See real verified KAYAK customer reviews for airlines flying to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Denmark to Illinois. 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 Denmark 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 8846 reviews
6.6Food
7.0Entertainment
8.1Crew
7.3Comfort
7.7Boarding
Airline reviews

Overall it was good. I missed my connection but I was put on another flight.

8.0 ExcellentJohanna, Jul 2025IAH - ORD
Read more United Airlines reviews

Overall it was good. I missed my connection but I was put on another flight.

Overall a very poor experience - booked premium economy tickets but due to last minute flight delays , all my itinery went for a toss and had to fly economy class with no access to lounge or any compensation by united airlines to make up for the flight delays . i had expected better experience than that from united.

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

I liked that the flight was nonstop from ORD to CIU for $200 round trip.

The schedule to Moline changed 5 times. The gate changed 6 times. That is a pathetic way to run an airline. No wonder that no one in our company flies on United Express to or from Moline. Changes happen most of the time. I learned my lesson on this trip…never again!

All flight attendants could benefit by taking an international flight on Qantas Airline. Qantas attendants are much more hospitable in every way. Much superior than and attendants on any US airline.

While the staff was pleasant and helpful, the following observations are for your awareness. There was some delay on the tarmac on take off and landing. The paid lunch/food offerings were limited. Entertainment was only available on WiFi at a cost.

The first flight was better in terms of the aircraft.

So far so good but food and entertainment are not available for this flight

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

No TV screen, free WiFi or power outlets, but seats were comfortable, food and drinks were great, service was awesome!

Very difficult to clearly hear the dialogue on videos due to airplane engine sound. Flying to Copenhagen audio was very clear. Food was excellent. Returning flight--Lunch and breakfast food was the worst I've experienced. Audio was terrible. Why the difference?

The check in not ok! Demanding that we check our carry ons on check in! When there was plenty of available space inside the plane! And the staff at check- in was rude and not helpful and I was traveling with my autistic son and his service dog! Boarding was easy since we were priority boarding! The crew was ok expect from one guy flight attendant that was actually great!

Crew was unresponsive to request for a soda. Food was horrible and I’d venture to guess many others thought so as well by the amount that they trashed. Made me sick to my stomach and ended up in bed the remainder of the day once we arrived. Screaming child for 3/4 of the almost 8 hour flight. Crew had no headphones whatsoever for free or purchase. Seating way too tight and we upgraded our seats. I do not see us ever flying this airline again.

Standard short hop flight. No food, no entertainment. Just get in, get something to drink, and try to be as comfortable as you can for an hour.

Travelling coach, comfort is all in one's perspective. Movie choices were great. Food was OK. Flight crew were pleasant. Tip: If they come through asking if you want tea or coffee, do not ask for water. They get miffed. So use the call button after they pass through.

They cancelled our flight home less than 24 hours before it was supposed to leave. It partially ruined our last day because I was on the phone trying to get 5 people home and the stress that it causes. We still arrived at the airport with no definite flight plans. The actual flight was good but my kids really misses the kids meals I had ordered for them which obviously didn’t make it to the new flight.

Maybe more diverse entertainment. Although the inflight cameras were amazing 10/10

Boarding was chaotic and the flight left late but arrived at a decent time. This may have been because of the sxsw festival that was going on.

I was pleasantly surprised as it was my first time flying with them. The seats were comfortable with more legroom than usual. The service was great too! The entertainment was good but could use a few more new movies.

Still one of my favorite airlines, but the entertainment options were a bit lacking. It didn't help that my screen didn't work on one of the legs of the trip.

The plane was very small and the aisle was so narrow that every time someone walked by they rubbed against me, so it was very uncomfortable.

Overall good for an economy fare. IMO the movie selection could be improved. Great that you can now connect bluetooth headphones to the entertainment system.

For a four hour flight, I was disappointed that everything was for purchase except for coffee, tea, or water. The disembarking in Iceland was so inefficient and time-consuming. We landed and stopped in the middle of the tarmac, had to disembark in the rain, and then squeeze into a bus which took us to the airport. Crazy! How does that work in winter?

Paid for a Premium seat...minimal recline, no footrest. Maybe slightly wider than a cheap economy seat. Zero chance of getting any rest on this plane

Comfort of seats is not good. Like sitting on a rock for 6 hours. Also no in flight food and limited beverages unless you pay is not nice. Need flight to be dark during the “night” but attendants don’t ask for shades to be lowered..

Iceland airlines doesn't provide any meal on flight to and from New York, except water and soda. Airline over charge for checking in luggage. I'm really upset.

The seats on this airline are sooo small, even for a petite person. I felt like the seat tilted forward and I was fighting to stay in it. The lavatory is horribly small, with a wet floor because the sink is so small you can't help but splash the water all over when washing up.

For an economy lite experience, it's by far the best I've had. New planes, clean, great destinations. Very happy to have discovered Iceland Air.

Smooth efficient airline. Think they should have their own bag drop as the queue took 30mins to bmscan and drop

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.

I had to fly United where the flight crew was atrocious

3/4 bags delayed and 1/4 damaged at the other end. Flight was freezing

The crew were good. The flight was on time. The entertainment choice was ok. But the food was bad, tasted and texture were awful.

After boarding we were waiting in the plane for more than one hour to take off without AC with very high temperature inside

The flight was an hour late leaving Heathrow. The food was mediocre. When we got to Austin, my husband’s luggage was missing. He filled out information at baggage claim. We are waiting to hear something. His name is Henry Jacob Braunig.

The food was very good and it came multiple times

Flight from LGW to JFK delayed by 4 hrs No explanation given until the pilot said the delay due to planned maintenance on the aircraft

We arrived late to London, and consequently were 5 min. late to be allowed through security for our next flight. Even though dozens of people missed the same flight, BA did not radio ahead to hold open security for an extra 5-10 min. to allow people to get on the flight. This caused an additional 6 hour delay in London after waiting over an hour in Customer Service to get rebooked. They did not have enough staff on hand to help people in a timely manner. Not at all happy with the BA's customer care or customer service.

All service prior to the flight was terrible: online check-in not working, no customer service tel,, multiple airport scanners not working, A huge mess.

CONSTANT ERROR MESSAGE THAT THE WIFI COULD NOT BE PURCHASED DUE TO INABILITY TO CONNECT PAYMENT SYSTEM VIA SATELLITE. THIS HAPPENED IN BOTH DIRECTIONS. THE MAIN REASON I TRAVEL IN PRIORITY IS TO BE ABLE TO WORK FOR WHICH I NEED ACCESS TO INTERNET. .

They lost my luggage. Lady who was helping with it in Austin was rude. Not very helpful!

Book cheap flights from Denmark to Illinois

Recent round-trip flight deals

 
These are the cheapest round-trip flights to Illinois found on KAYAK in the last 72 hours.
8/22Fri
1 stop
11h 50mCPH-ORD
9/4Thu
1 stop
16h 55mORD-CPH
$461
8/22Fri
1 stop
11h 50mCPH-ORD
9/4Thu
1 stop
22h 45mORD-CPH
$463
8/22Fri
1 stopIcelandair
26h 40mCPH-ORD
9/4Thu
1 stopIcelandair
19h 20mORD-CPH
$476
9/30Tue
1 stopIcelandair
32h 30mCPH-ORD
10/9Thu
1 stopIcelandair
10h 30mORD-CPH
$483
8/22Fri
1 stopBritish Airways
13h 11mCPH-ORD
9/4Thu
1 stopBritish Airways
13h 15mORD-CPH
$503
10/14Tue
2 stopsBritish Airways
31h 29mBLL-ORD
1/7Wed
2 stopsBritish Airways
16h 45mORD-BLL
$505
12/4Thu
2 stopsUnited Airlines
26h 08mBLL-ORD
12/8Mon
2 stopsUnited Airlines
15h 35mORD-BLL
$511
12/4Thu
2 stopsUnited Airlines
19h 55mBLL-ORD
12/8Mon
1 stopUnited Airlines
11h 55mORD-BLL
$512
8/22Fri
nonstopScandinavian Airlines
9h 15mCPH-ORD
9/4Thu
nonstopScandinavian Airlines
8h 30mORD-CPH
$527
8/22Fri
nonstopScandinavian Airlines
9h 15mCPH-ORD
9/4Thu
nonstopScandinavian Airlines
8h 30mORD-CPH
$528

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Recent one-way flight deals

 
Only flying one-way? Below are some of the best deals for one-way flights to Illinois found on KAYAK in the last 72 hours.
9/11Thu
2 stops
40h 37mCPH-ORD
$330
9/26Fri
2 stops
48h 23mCPH-ORD
$346
9/29Mon
2 stops
36h 01mCPH-ORD
$349
12/7Sun
1 stopTAP AIR PORTUGAL
16h 00mCPH-ORD
$427
11/11Tue
1 stopTAP AIR PORTUGAL
27h 30mCPH-ORD
$429
8/10Sun
2 stopsIcelandair
31h 35mCPH-ORD
$528
8/20Wed
1 stopIcelandair
20h 55mCPH-ORD
$531
12/8Mon
1 stopLufthansa
12h 40mCPH-ORD
$545
9/25Thu
1 stopLufthansa
11h 50mCPH-ORD
$555
9/27Sat
2 stopsVirgin Atlantic
19h 13mCPH-MDW
$649

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Last minute flights to Illinois

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights to Illinois that are departing in the next 10 days.
7/15Tue
multi-stopUnited Airlines
27h 24mCPH-ORD
7/20Sun
multi-stopUnited Airlines
11h 40mORD-CPH
$715
7/15Tue
multi-stopUnited Airlines
27h 24mCPH-ORD
7/20Sun
multi-stopUnited Airlines
16h 52mORD-CPH
$717
7/15Tue
multi-stopUnited Airlines
17h 45mCPH-ORD
7/20Sun
multi-stopUnited Airlines
16h 52mORD-CPH
$723
7/15Tue
multi-stopSWISS
13h 15mCPH-ORD
7/21Mon
multi-stopSWISS
11h 35mORD-CPH
$728
7/11Fri
multi-stopUnited Airlines
27h 24mCPH-ORD
7/13Sun
multi-stopUnited Airlines
16h 10mORD-CPH
$729
7/15Tue
multi-stopAir Canada
27h 24mCPH-ORD
7/20Sun
multi-stopAir Canada
16h 00mORD-CPH
$734
7/15Tue
multi-stopAir Canada
33h 10mCPH-ORD
7/21Mon
multi-stopAir Canada
21h 15mORD-CPH
$738
7/13Sun
multi-stopLOT
31h 15mCPH-ORD
7/21Mon
multi-stopLOT
29h 15mORD-CPH
$752
7/12Sat
multi-stopLOT
19h 40mCPH-ORD
7/20Sun
multi-stopLOT
12h 50mORD-CPH
$754
7/15Tue
multi-stopLufthansa
13h 50mCPH-ORD
7/21Mon
multi-stopLufthansa
13h 15mORD-CPH
$791

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Everything you need to know for your flight to Illinois

Cabin class types available on flights to Illinois

Cabin classes available on flights to Illinois. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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