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Cheap flights from Denmark to Illinois from $325

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Denmark to Illinois departing on 5/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Denmark to Illinois

Recent round-trip flight deals from Denmark to Illinois

Enter your travel dates to find the best prices.
British Airways Logo
1:00 pm - 6:45 pm
BLL
-
ORD
12h 45m1 stop
British Airways Logo
9:45 pm - 12:30 pm
ORD
-
BLL
31h 45m1 stop
$482British Airways
Thu, Jan 15 - Mon, Jan 19
Icelandair Logo
2:00 pm - 6:15 pm
CPH
-
ORD
11h 15m1 stop
Icelandair Logo
7:25 pm - 4:15 pm
ORD
-
CPH
13h 50m1 stop
$486Icelandair
Tue, Apr 7 - Sun, Apr 19
Scandinavian Airlines Logo
2:30 pm - 4:45 pm
CPH
-
ORD
9h 15mnonstop
Scandinavian Airlines Logo
7:20 pm - 10:25 am
ORD
-
CPH
8h 05mnonstop
$489Scandinavian Airlines
Thu, Jan 15 - Wed, Jan 28
Scandinavian Airlines Logo
2:30 pm - 4:45 pm
CPH
-
ORD
9h 15mnonstop
Scandinavian Airlines Logo
7:20 pm - 10:25 am
ORD
-
CPH
8h 05mnonstop
$500Scandinavian Airlines
Thu, Jan 15 - Wed, Jan 28
Lufthansa Logo
6:50 am - 1:55 pm
CPH
-
STL
14h 05m1 stop
Lufthansa Logo
6:40 pm - 5:35 pm
STL
-
CPH
15h 55m2 stops
$530Lufthansa
Sun, Jan 25 - Fri, Jan 30
Lufthansa Logo
6:50 am - 1:55 pm
CPH
-
STL
14h 05m1 stop
Lufthansa Logo
12:44 pm - 5:35 pm
STL
-
CPH
21h 51m2 stops
$535Lufthansa
Fri, Jan 23 - Wed, Jan 28
United Airlines Logo
6:30 am - 3:20 pm
BLL
-
ORD
15h 50m1 stop
United Airlines Logo
1:00 pm - 1:20 pm
ORD
-
BLL
17h 20m2 stops
$556United Airlines
Thu, Jan 15 - Mon, Jan 19
United Airlines Logo
2:15 pm - 11:39 pm
BLL
-
ORD
16h 24m2 stops
United Airlines Logo
1:00 pm - 1:25 pm
ORD
-
BLL
17h 25m2 stops
$561United Airlines
Sat, Jan 17 - Wed, Jan 21
American Airlines Logo
10:30 am - 9:03 am
CPH
-
STL
29h 33m2 stops
American Airlines Logo
11:27 am - 2:50 pm
STL
-
CPH
20h 23m2 stops
$573American Airlines
Thu, Jan 8 - Mon, Jan 19
American Airlines Logo
10:30 am - 9:03 am
CPH
-
STL
29h 33m2 stops
American Airlines Logo
2:54 pm - 4:55 pm
STL
-
CPH
19h 01m2 stops
$612American Airlines
Thu, Jan 8 - Tue, Jan 13

Icelandair flights from Denmark to Illinois

Our best Icelandair deals on Denmark to Illinois flight tickets
Icelandair
Mar 10
CPH12:55 pmKastrup Copenhagen
11h 25m
1 stop
ORD6:20 pmChicago O'Hare Intl
Mar 18
ORD7:30 pmChicago O'Hare Intl
18h 20m
1 stop
CPH7:50 pmKastrup Copenhagen
$486
Find similar
Icelandair
Mar 9
CPH8:50 pmKastrup Copenhagen
27h 30m
1 stop
ORD6:20 pmChicago O'Hare Intl
Mar 17
ORD7:30 pmChicago O'Hare Intl
10h 15m
1 stop
CPH11:45 amKastrup Copenhagen
$487
Find similar
Icelandair
Mar 15
CPH6:15 amKastrup Copenhagen
18h 05m
1 stop
ORD6:20 pmChicago O'Hare Intl
Mar 18
ORD7:30 pmChicago O'Hare Intl
18h 20m
1 stop
CPH7:50 pmKastrup Copenhagen
$524
Find similar

United Airlines flights from Denmark to Illinois

Our best United Airlines deals on Denmark to Illinois flight tickets
United Airlines
Jan 15
BLL6:30 amBillund
15h 50m
1 stop
ORD3:20 pmChicago O'Hare Intl
Jan 19
ORD4:05 pmChicago O'Hare Intl
14h 15m
1 stop
BLL1:20 pmBillund
$556
Find similar
United Airlines
Jan 17
BLL6:45 amBillund
20h 30m
2 stops
ORD8:15 pmChicago O'Hare Intl
Jan 21
ORD4:05 pmChicago O'Hare Intl
14h 20m
1 stop
BLL1:25 pmBillund
$561
Find similar
United Airlines
Jan 15
CPH10:10 amKastrup Copenhagen
12h 10m
1 stop
ORD3:20 pmChicago O'Hare Intl
Jan 28
ORD6:00 pmChicago O'Hare Intl
11h 25m
1 stop
CPH12:25 pmKastrup Copenhagen
$568
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Denmark to Illinois 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 December 11, 2025.
Use the filters below to find and compare flights from Denmark to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BillundChicago

BLL - ORD

BLLORD

Billund

Thu 1/15

1:00 pm-6:45 pm

1 stop12h 45m

Chicago O'Hare Intl

Mon 1/19

9:45 pm-12:30 pm

1 stop31h 45m

$482

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Tue 4/7

2:00 pm-6:15 pm

1 stop11h 15m

Chicago O'Hare Intl

Sun 4/19

7:25 pm-4:15 pm

1 stop13h 50m

$486

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Thu 1/15

2:30 pm-4:45 pm

Nonstop9h 15m

Chicago O'Hare Intl

Wed 1/28

7:20 pm-10:25 am

Nonstop8h 05m

$489

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Thu 1/15

2:30 pm-4:45 pm

Nonstop9h 15m

Chicago O'Hare Intl

Wed 1/28

7:20 pm-10:25 am

Nonstop8h 05m

$500

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 1/25

6:50 am-1:55 pm

1 stop14h 05m

Lambert-St Louis

Fri 1/30

6:40 pm-5:35 pm

2 stops15h 55m

$530

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Fri 1/23

6:50 am-1:55 pm

1 stop14h 05m

Lambert-St Louis

Wed 1/28

12:44 pm-5:35 pm

2 stops21h 51m

$535

BillundChicago

BLL - ORD

BLLORD

Billund

Thu 1/15

6:30 am-3:20 pm

1 stop15h 50m

Chicago O'Hare Intl

Mon 1/19

1:00 pm-1:20 pm

2 stops17h 20m

$556

BillundChicago

BLL - ORD

BLLORD

Billund

Sat 1/17

2:15 pm-11:39 pm

2 stops16h 24m

Chicago O'Hare Intl

Wed 1/21

1:00 pm-1:25 pm

2 stops17h 25m

$561

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Thu 1/8

10:30 am-9:03 am

2 stops29h 33m

Lambert-St Louis

Mon 1/19

11:27 am-2:50 pm

2 stops20h 23m

$573

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Thu 1/8

10:30 am-9:03 am

2 stops29h 33m

Lambert-St Louis

Tue 1/13

2:54 pm-4:55 pm

2 stops19h 01m

$612

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 Illinois from

How to get the cheapest flight ticket from Denmark to Illinois

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 Illinois?

The cheapest month to fly to Illinois from Denmark is in February. Flight prices, which tend to average around $516, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of February, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $544.

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

The cheapest day to depart from Denmark to Illinois is on a Tuesday when prices can be found for as low as $511. Flights from Denmark to Illinois on a Friday will generally be more expensive and average around $863. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our most recent data shows that the best time of day to fly to Illinois is in the morning. Flights from Denmark to Illinois during this time can be as low as $532. Flights in the afternoon are often more expensive with an average ticket price of $934.

What is the cheapest Denmark to Illinois flight route?

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

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

You are more likely to see cheaper flights to Illinois from Denmark when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $636 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Denmark for as low as $563 on momondo.

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

There are 3 cabin classes available to choose from on Denmark to Illinois 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 Denmark to Illinois flights?

You could potentially save up to 40% on your flight if you consider stops on a Denmark to Illinois flight.

Cheap Denmark to Illinois flight deals and tips

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

Best Price Found

$613

Fastest flight time

9h 15m

Direct flights

Mon, Tue, Thu, Fri, Sat and Sun

Airports in Illinois

98 airports
The best flight deal from Denmark to Illinois found on momondo in the last 72 hours is $613
The fastest flight from Denmark to Illinois takes 9h 15m
Direct flights go from Denmark to Illinois on Monday, Tuesday, Thursday, Friday, Saturday and Sunday. There are no airlines offering direct flights.
There are 98 airports in Illinois. From Denmark there are direct flights to Chicago O'Hare Intl (ORD).
Search flight deals

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

    Prices for flights from Denmark to Illinois are refreshed on a daily basis.

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

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

    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 Denmark to Illinois.

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

    The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

Best airlines flying from Denmark to Illinois

Compare and see reviews for airlines that fly from Denmark to Illinois with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $460Free CancellationRating
7.4
9,095 reviews
Search United Airlines flights
LufthansaPriceFrom $530Free CancellationRating
6.8
7,626 reviews
Search Lufthansa flights
Scandinavian AirlinesPriceFrom $537Free CancellationRating
7.4
1,605 reviews
Search Scandinavian Airlines flights

Why use momondo?

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

It is quick and easy to find Denmark to Illinois flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Illinois that suits you.

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

All flight searches from Denmark to Illinois on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Denmark.

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

Price alerts on flights to Illinois from Denmark are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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