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Cheap flights from Illinois to Denmark from $171

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Denmark departing on 11/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Illinois to Denmark

Cheap round-trip flights

Icelandair Logo
7:25 pm - 3:45 pmORD-CPH
13h 20m1 stop
Icelandair Logo
2:00 pm - 6:15 pmCPH-ORD
11h 15m1 stop
$455Icelandair
Find Deal
Tue, Oct 7 - Tue, Oct 21
Scandinavian Airlines Logo
10:25 am - 6:55 amORD-CPH
13h 30m1 stop
Scandinavian Airlines Logo
2:30 pm - 4:45 pmCPH-ORD
9h 15mnonstop
$459Scandinavian Airlines
Find Deal
Tue, Nov 4 - Mon, Nov 10
Scandinavian Airlines Logo
6:20 pm - 7:10 amORD-CPH
29h 50m1 stop
Scandinavian Airlines Logo
2:30 pm - 4:45 pmCPH-ORD
9h 15mnonstop
$462Scandinavian Airlines
Find Deal
Wed, Nov 5 - Sun, Nov 9
Multiple Airlines Logo
8:15 pm - 11:40 pmORD-CPH
20h 25m1 stop
Multiple Airlines Logo
6:45 am - 6:45 pmCPH-ORD
19h 00m1 stop
$493Multiple Airlines
Find Deal
Fri, Nov 14 - Thu, Nov 27
Austrian Airlines Logo
4:20 pm - 4:55 pmORD-CPH
17h 35m1 stop
Austrian Airlines Logo
9:50 am - 3:00 pmCPH-ORD
35h 10m1 stop
$511Austrian Airlines
Find Deal
Tue, Oct 14 - Thu, Oct 30
Multiple Airlines Logo
7:10 pm - 5:45 pmORD-CPH
15h 35m1 stop
Multiple Airlines Logo
6:55 am - 5:55 pmCPH-ORD
18h 00m2 stops
$518Multiple Airlines
Find Deal
Wed, Nov 12 - Sun, Nov 16
KLM Logo
4:25 pm - 10:50 pmORD-BLL
23h 25m1 stop
KLM Logo
6:00 am - 2:20 pmBLL-ORD
15h 20m1 stop
$546KLM
Find Deal
Wed, Dec 3 - Fri, Dec 5
Delta Logo
10:36 am - 9:40 amORD-BLL
16h 04m2 stops
Delta Logo
10:25 am - 2:20 pmBLL-ORD
10h 55m1 stop
$550Delta
Find Deal
Wed, Dec 3 - Fri, Dec 5
Delta Logo
1:00 pm - 1:10 pmMDW-CPH
17h 10m2 stops
Delta Logo
6:45 am - 6:34 pmCPH-MDW
18h 49m2 stops
$557Delta
Find Deal
Tue, Jan 13 - Tue, Jan 20
KLM Logo
5:31 pm - 9:55 amSTL-CPH
33h 24m1 stop
KLM Logo
9:00 am - 4:43 pmCPH-STL
14h 43m1 stop
$683KLM
Find Deal
Mon, Oct 6 - Thu, Oct 16

Lufthansa flights from Illinois to Denmark

Our best Lufthansa deals on Illinois to Denmark flight tickets
Lufthansa
Oct 31
ORD10:50 pmChicago O'Hare Intl
28h 50m
2 stops
BLL9:40 amBillund
Nov 14
BLL10:25 amBillund
15h 00m
2 stops
ORD6:25 pmChicago O'Hare Intl
$622
Find similar
Lufthansa
Oct 11
ORD9:40 pmChicago O'Hare Intl
18h 35m
1 stop
BLL11:15 pmBillund
Oct 26
BLL10:25 amBillund
11h 55m
1 stop
ORD4:20 pmChicago O'Hare Intl
$652
Find similar
Lufthansa
Oct 10
ORD4:00 pmChicago O'Hare Intl
11h 10m
1 stop
BLL10:10 amBillund
Oct 26
BLL10:25 amBillund
11h 55m
1 stop
ORD4:20 pmChicago O'Hare Intl
$656
Find similar

Icelandair flights from Illinois to Denmark

Our best Icelandair deals on Illinois to Denmark flight tickets
Icelandair
Oct 7
ORD7:25 pmChicago O'Hare Intl
13h 20m
1 stop
CPH3:45 pmKastrup Copenhagen
Oct 21
CPH2:00 pmKastrup Copenhagen
11h 15m
1 stop
ORD6:15 pmChicago O'Hare Intl
$455
Find similar
Icelandair
Oct 7
ORD7:25 pmChicago O'Hare Intl
19h 20m
1 stop
CPH9:45 pmKastrup Copenhagen
Oct 21
CPH2:00 pmKastrup Copenhagen
11h 15m
1 stop
ORD6:15 pmChicago O'Hare Intl
$467
Find similar
Icelandair
Oct 19
ORD7:25 pmChicago O'Hare Intl
19h 20m
1 stop
CPH9:45 pmKastrup Copenhagen
Oct 30
CPH12:55 pmKastrup Copenhagen
11h 25m
1 stop
ORD6:20 pmChicago O'Hare Intl
$475
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Denmark that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated September 23, 2025.
Use the filters below to find and compare flights from Illinois to Denmark that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Tue 10/7

7:25 pm-3:45 pm

1 stop13h 20m

Kastrup Copenhagen

Tue 10/21

2:00 pm-6:15 pm

1 stop11h 15m

$455

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Tue 11/4

10:25 am-6:55 am

1 stop13h 30m

Kastrup Copenhagen

Mon 11/10

2:30 pm-4:45 pm

Nonstop9h 15m

$459

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Wed 11/5

6:20 pm-7:10 am

1 stop29h 50m

Kastrup Copenhagen

Sun 11/9

2:30 pm-4:45 pm

Nonstop9h 15m

$462

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Fri 11/14

8:15 pm-11:40 pm

1 stop20h 25m

Kastrup Copenhagen

Thu 11/27

6:45 am-6:45 pm

1 stop19h 00m

$493

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Tue 10/14

4:20 pm-4:55 pm

1 stop17h 35m

Kastrup Copenhagen

Thu 10/30

9:50 am-3:00 pm

1 stop35h 10m

$511

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Wed 11/12

7:10 pm-5:45 pm

1 stop15h 35m

Kastrup Copenhagen

Sun 11/16

6:55 am-5:55 pm

2 stops18h 00m

$518

ChicagoBillund

ORD - BLL

ORDBLL

Chicago O'Hare Intl

Wed 12/3

4:25 pm-10:50 pm

1 stop23h 25m

Billund

Fri 12/5

6:00 am-2:20 pm

1 stop15h 20m

$546

ChicagoBillund

ORD - BLL

ORDBLL

Chicago O'Hare Intl

Wed 12/3

10:36 am-9:40 am

2 stops16h 04m

Billund

Fri 12/5

10:25 am-2:20 pm

1 stop10h 55m

$550

ChicagoCopenhagen

MDW - CPH

MDWCPH

Chicago Midway

Tue 1/13

1:00 pm-1:10 pm

2 stops17h 10m

Kastrup Copenhagen

Tue 1/20

6:45 am-6:34 pm

2 stops18h 49m

$557

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Mon 10/6

5:31 pm-9:55 am

1 stop33h 24m

Kastrup Copenhagen

Thu 10/16

9:00 am-4:43 pm

1 stop14h 43m

$683

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Denmark from

How to get the cheapest flight ticket from Illinois to Denmark

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Denmark?

In general, February is the cheapest month to fly from Illinois to Denmark. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $438. If you aren’t able to travel to Denmark during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $450.

What is the cheapest day to depart on your flight to Denmark?

The cheapest day to depart from Illinois to Denmark is on a Wednesday. Travelers who choose to depart for Denmark on a Wednesday will often find tickets for as low as $523. On the other hand, Friday is the most expensive day to depart from Illinois because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $659.

What is the cheapest time of day to depart on your flight to Denmark?

Flying to Denmark from Illinois in the evening is the least expensive time of day to depart. momondo users have found prices as low as $598 when looking at flights departing in the evening. At noon is when there is more demand to fly to Denmark, so prices are often more expensive at around $713 per ticket.

What is the cheapest Illinois to Denmark flight route?

Fly from Chicago O'Hare Intl to Kastrup Copenhagen for the best Illinois - Denmark flight prices

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

You are more likely to see cheaper flights to Denmark from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Denmark for around $644 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denmark from Illinois for as low as $576 on momondo.

What cabin class options are available on Illinois to Denmark flights?

There are 3 cabin classes available to choose from on Illinois to Denmark flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Illinois to Denmark flights?

You could potentially save up to 19% on your flight if you consider stops on a Illinois to Denmark flight.

Cheap Illinois to Denmark flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Denmark

Best Price Found

$373

Fastest flight time

8h 05m

Direct flights

Every day

Airports in Denmark

1 airport
The best one-way flight to Denmark from Illinois in the past 72 hours is $373. The best round-trip flight deal from Illinois to Denmark found on momondo in the last 72 hours is $451.
The fastest flight from Illinois to Denmark takes 8h 05m
Direct flights go from Illinois to Denmark every day.
There is 1 airport near Denmark: Kastrup Copenhagen (CPH)
Search flight deals

  • When did momondo last update prices for flights from Illinois to Denmark?

    Prices for flights from Illinois to Denmark were last updated today.

  • How many operators does momondo search for flights from Illinois to Denmark?

  • How old do you have to be to fly from Illinois to Denmark?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to Denmark.

  • What documentation or ID do you need to fly to Denmark?

    The required travel and health documents for your Denmark trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Denmark. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Illinois to Denmark?

Best airlines flying from Illinois to Denmark

Compare and see reviews for airlines that fly from Illinois to Denmark with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $397Free CancellationRating
7.0
545 reviews
Search Icelandair flights
Scandinavian AirlinesPriceFrom $437Free CancellationRating
7.4
1,492 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom $471Free CancellationRating
6.8
7,421 reviews
Search Lufthansa flights
American AirlinesPriceFrom $489Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $513Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
British AirwaysPriceFrom $531Free CancellationRating
6.7
7,391 reviews
Search British Airways flights
Air CanadaPriceFrom $533Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
SWISSPriceFrom $554Free CancellationRating
7.6
1,742 reviews
Search SWISS flights
FinnairPriceFrom $570Free CancellationRating
7.6
1,326 reviews
Search Finnair flights
DeltaPriceFrom $611Free CancellationRating
7.9
7,974 reviews
Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Denmark?

Finding the right flight to Denmark from Illinois is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Denmark quick and easy, saving you time and money.

Can I find flights from Illinois to Denmark with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Illinois to Denmark flights to just show those with flexible booking policies.

How can momondo help me find flights from Illinois to Denmark?

Once you have performed a search for Illinois to Denmark flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Illinois to Denmark right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Illinois to Denmark flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Denmark trip

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