What is the cheapest airline that flies from Denmark to Illinois?

American Airlines, British Airways, and TAP AIR PORTUGAL are the most popular carriers operating from Denmark to Illinois

How many flights depart from Denmark to Illinois on average per week?

As of November 2025, 12 flights take off from Denmark and land in Illinois each week. The most common flight departure day for this route is Mon, with 25% of weekly flights taking off on this day.

What airlines fly to Illinois?

Scandinavian Airlines, Lufthansa and United Airlines are the top three most popular airlines that fly to Illinois from Denmark according to our data. Scandinavian Airlines is the first choice among our users, with 62% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 4 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

How many flights depart from Denmark to Illinois on average per day?

As of November 2025, 1 flights take off from Denmark and land in Illinois each day. The most common flight departure time for this route is 2:00PM, with 100% of daily flights taking off in the afternoon.

How long is the flight from Denmark to Illinois?

The flight from Denmark to Illinois depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Copenhagen (a popular airport in Denmark) to Chicago O'Hare Intl Airport (the most popular airport in Illinois), then the flight time is 9h 15m on average. If you fly from Billund (another popular airport in Denmark) to Chicago O'Hare Intl Airport, then the average flight time is 10h 55m.

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?

As of November 2025, there are 5 operators available to choose from 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.

$312 Cheap Flights from Denmark to Illinois in 2025/26

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Find the cheapest flights from Denmark to Illinois

Round-trip

One-way

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Recent round-trip flight deals from Denmark to Illinois

Enter your travel dates to find the best prices.

2:30 pm - 4:45 pmCPH-ORD

9h 15mnonstop

7:20 pm - 10:25 amORD-CPH

8h 05mnonstop

$475Scandinavian Airlines

Find Deal

Fri, Dec 12 - Sun, Dec 28

2:30 pm - 4:45 pmCPH-ORD

9h 15mnonstop

7:20 pm - 10:25 amORD-CPH

8h 05mnonstop

$477Scandinavian Airlines

Find Deal

Mon, Jan 12 - Mon, Jan 19

10:50 am - 6:15 pmCPH-ORD

14h 25m1 stop

9:15 pm - 1:35 pmORD-CPH

33h 20m1 stop

$485American Airlines

Find Deal

Thu, Apr 30 - Sun, May 3

11:00 am - 5:00 pmCPH-ORD

13h 00m1 stop

2:50 pm - 1:30 pmORD-CPH

15h 40m2 stops

$488British Airways

Find Deal

Mon, Jan 26 - Sun, Feb 8

10:50 am - 8:02 pmCPH-ORD

16h 12m2 stops

10:35 pm - 8:55 pmORD-CPH

15h 20m1 stop

$490American Airlines

Find Deal

Thu, Apr 30 - Sun, May 3

6:15 am - 5:47 pmCPH-ORD

18h 32m2 stops

5:10 pm - 5:40 pmORD-CPH

17h 30m1 stop

$497British Airways

Find Deal

Sat, Jan 10 - Sat, Jan 17

10:10 am - 3:20 pmCPH-ORD

12h 10m1 stop

3:20 pm - 9:20 amORD-CPH

11h 00m1 stop

$500Lufthansa

Find Deal

Fri, Dec 12 - Sun, Dec 28

6:50 am - 1:55 pmCPH-STL

14h 05m1 stop

12:31 pm - 9:20 amSTL-CPH

13h 49m2 stops

$506Lufthansa

Find Deal

Sun, Nov 23 - Fri, Nov 28

6:30 am - 8:05 pmBLL-ORD

20h 35m1 stop

4:20 pm - 1:30 pmORD-BLL

14h 10m1 stop

$526United Airlines

Find Deal

Fri, Nov 21 - Sun, Nov 30

6:30 am - 10:13 pmBLL-STL

22h 43m2 stops

3:13 pm - 1:20 pmSTL-BLL

16h 07m2 stops

$532United Airlines

Find Deal

Thu, Mar 5 - Mon, Mar 9

American Airlines flights from Denmark to Illinois

Our best American Airlines deals on Denmark to Illinois flight tickets

American Airlines

Apr 30

CPH10:50 amKastrup Copenhagen

14h 25m

1 stop

ORD6:15 pmChicago O'Hare Intl

May 3

ORD9:15 pmChicago O'Hare Intl

33h 20m

1 stop

CPH1:35 pmKastrup Copenhagen

$485

Find similar

American Airlines

Apr 30

CPH10:50 amKastrup Copenhagen

16h 12m

2 stops

ORD8:02 pmChicago O'Hare Intl

May 3

ORD10:35 pmChicago O'Hare Intl

15h 20m

1 stop

CPH8:55 pmKastrup Copenhagen

$490

Find similar

American Airlines

Jan 26

CPH6:45 amKastrup Copenhagen

20h 30m

2 stops

ORD8:15 pmChicago O'Hare Intl

Feb 8

ORD2:50 pmChicago O'Hare Intl

15h 40m

2 stops

CPH1:30 pmKastrup Copenhagen

$491

Find similar

British Airways flights from Denmark to Illinois

Our best British Airways deals on Denmark to Illinois flight tickets

British Airways

Jan 26

CPH11:00 amKastrup Copenhagen

13h 00m

1 stop

ORD5:00 pmChicago O'Hare Intl

Feb 8

ORD2:50 pmChicago O'Hare Intl

15h 40m

2 stops

CPH1:30 pmKastrup Copenhagen

$488

Find similar

British Airways

Jan 10

CPH6:15 amKastrup Copenhagen

18h 32m

2 stops

ORD5:47 pmChicago O'Hare Intl

Jan 17

ORD5:10 pmChicago O'Hare Intl

17h 30m

1 stop

CPH5:40 pmKastrup Copenhagen

$497

Find similar

British Airways

Dec 3

CPH6:55 amKastrup Copenhagen

17h 05m

1 stop

ORD5:00 pmChicago O'Hare Intl

Dec 10

ORD10:06 amChicago O'Hare Intl

18h 14m

2 stops

CPH11:20 amKastrup Copenhagen

$510

Find similar

Fly from

Fly to

Route

Depart

Return

Price

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Fri 12/12

2:30 pm-4:45 pm

Nonstop9h 15m

Chicago O'Hare Intl

Sun 12/28

7:20 pm-10:25 am

Nonstop8h 05m

$475

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Mon 1/12

2:30 pm-4:45 pm

Nonstop9h 15m

Chicago O'Hare Intl

Mon 1/19

7:20 pm-10:25 am

Nonstop8h 05m

$477

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Thu 4/30

10:50 am-6:15 pm

1 stop14h 25m

Chicago O'Hare Intl

Sun 5/3

9:15 pm-1:35 pm

1 stop33h 20m

$485

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Mon 1/26

11:00 am-5:00 pm

1 stop13h 00m

Chicago O'Hare Intl

Sun 2/8

2:50 pm-1:30 pm

2 stops15h 40m

$488

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Thu 4/30

10:50 am-8:02 pm

2 stops16h 12m

Chicago O'Hare Intl

Sun 5/3

10:35 pm-8:55 pm

1 stop15h 20m

$490

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Sat 1/10

6:15 am-5:47 pm

2 stops18h 32m

Chicago O'Hare Intl

Sat 1/17

5:10 pm-5:40 pm

1 stop17h 30m

$497

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Fri 12/12

10:10 am-3:20 pm

1 stop12h 10m

Chicago O'Hare Intl

Sun 12/28

3:20 pm-9:20 am

1 stop11h 00m

$500

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 11/23

6:50 am-1:55 pm

1 stop14h 05m

Lambert-St Louis

Fri 11/28

12:31 pm-9:20 am

2 stops13h 49m

$506

BillundChicago

BLL - ORD

BLLORD

Billund

Fri 11/21

6:30 am-8:05 pm

1 stop20h 35m

Chicago O'Hare Intl

Sun 11/30

4:20 pm-1:30 pm

1 stop14h 10m

$526

BillundSt. Louis

BLL - STL

BLLSTL

Billund

Thu 3/5

6:30 am-10:13 pm

2 stops22h 43m

Lambert-St Louis

Mon 3/9

3:13 pm-1:20 pm

2 stops16h 07m

$532

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

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 $499, 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 March is also cheap. Prices for this month can be found on momondo for an average of $547.

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

The cheapest day to depart from Denmark to Illinois is on a Wednesday when prices can be found for as low as $504. Flights from Denmark to Illinois on a Friday will generally be more expensive and average around $844. 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 $632 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 $575 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 26% 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	$582
Fastest flight time	9h 15m
Direct flights	Mon, Tue, Thu, Fri, Sat and Sun
Airports in Illinois	1 airport

The best one-way flight to Illinois from Denmark in the past 72 hours is $582. The best round-trip flight deal from Denmark to Illinois found on momondo in the last 72 hours is $858.

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 is 1 airport near Illinois: 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?
As of November 2025, there are 5 operators available to choose from 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?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Denmark to Illinois is Airbus A350-900 (56.51% of total bookings). The next most popular plane models are Airbus A330-300 (42.49%) and Airbus A321neo (1.00%).

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
Icelandair	PriceFrom $364	Free Cancellation	Rating 7.1 568 reviews	Search Icelandair flights
United Airlines	PriceFrom $460	Free Cancellation	Rating 7.4 8,998 reviews	Search United Airlines flights
Scandinavian Airlines	PriceFrom $520	Free Cancellation	Rating 7.4 1,557 reviews	Search Scandinavian Airlines flights
Lufthansa	PriceFrom $530	Free Cancellation	Rating 6.8 7,547 reviews	Search Lufthansa 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.

An easier way to manage your Illinois trip

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Find better results for your trip to Illinois

Popular cities in Illinois

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Cheap flights from Denmark to Illinois from $312

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 4/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

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Find the cheapest flights from Denmark to Illinois

Recent round-trip flight deals from Denmark to Illinois

Recent one-way flight deals from Denmark to Illinois

Recent last minute flight deals from Denmark to Illinois

Recent direct flight deals from Denmark to Illinois

American Airlines flights from Denmark to Illinois

Our best American Airlines deals on Denmark to Illinois flight tickets

British Airways flights from Denmark to Illinois

Our best British Airways deals on Denmark to Illinois flight tickets

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Use the filters below to find and compare flights from Denmark to Illinois that are best for you.

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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?

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

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?

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 26% on your flight if you consider stops on a Denmark to Illinois flight.

What is the cheapest airline that flies from Denmark to Illinois?

American Airlines, British Airways, and TAP AIR PORTUGAL are the most popular carriers operating from Denmark to Illinois

What airlines fly to Illinois?

How many flights depart from Denmark to Illinois on average per day?

As of November 2025, 1 flights take off from Denmark and land in Illinois each day. The most common flight departure time for this route is 2:00PM, with 100% of daily flights taking off in the afternoon.

How many flights depart from Denmark to Illinois on average per week?

As of November 2025, 12 flights take off from Denmark and land in Illinois each week. The most common flight departure day for this route is Mon, with 25% of weekly flights taking off on this day.

How long is the flight from Denmark to Illinois?

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

Fastest flight time

Direct flights

Airports in Illinois

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

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?

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

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

Why use momondo?

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

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

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

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

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo