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Denmark

$235+ Cheap flights from Illinois to Denmark

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — CPH
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap flight deals from Illinois to Denmark

Cheapest flights from Illinois to Denmark
Explore the most affordable flight options available from Illinois to Denmark. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

This United Airlines deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/134:10 pmORD - CPH
1 stop14h 50mUnited Airlines
Tue 12/166:55 amCPH - ORD
1 stop12h 15mUnited Airlines
Deal found 12/13$545
This Air France deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:20 pmORD - CPH
1 stop15h 45mMultiple Airlines
Thu 1/85:30 pmCPH - ORD
1 stop27h 50mMultiple Airlines
Deal found 12/13$569
This American Airlines deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/305:10 pmORD - CPH
1 stop16h 45mAmerican Airlines
Wed 1/710:30 amCPH - ORD
1 stop15h 15mAmerican Airlines
Deal found 12/13$571
This Delta deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/319:41 amORD - CPH
2 stops18h 34mDelta
Thu 1/82:15 pmCPH - ORD
1 stop31h 05mDelta
Deal found 12/13$578
This Booking.com deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/134:10 pmORD - CPH
1 stop14h 50mMultiple Airlines
Wed 12/171:05 pmCPH - ORD
1 stop29h 05mMultiple Airlines
Deal found 12/13$580
This SWISS deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:50 pmORD - CPH
2 stops14h 45mSWISS
Thu 1/87:55 pmCPH - ORD
2 stops25h 15mSWISS
Deal found 12/13$584
This KAYAK deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/134:10 pmORD - CPH
1 stop19h 55mSWISS
Sat 12/276:40 amCPH - ORD
1 stop16h 40mSWISS
Deal found 12/13$597
This United Airlines deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/314:20 pmORD - CPH
1 stop12h 25mUnited Airlines
Sat 1/1010:05 amCPH - ORD
2 stops31h 55mUnited Airlines
Deal found 12/13$599
This United Airlines deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/132:30 pmORD - CPH
2 stops20h 00mUnited Airlines
Sat 12/276:55 amCPH - ORD
1 stop12h 15mUnited Airlines
Deal found 12/13$601
This Cheapflightsfares deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/156:10 pmORD - CPH
2 stops16h 25mLufthansa
Sat 12/2012:40 pmCPH - ORD
2 stops29h 20mLufthansa
Deal found 12/14$608
This United Airlines deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/1511:50 amSTL - CPH
2 stops22h 40mUnited Airlines
Fri 12/196:55 amCPH - STL
2 stops34h 13mUnited Airlines
Deal found 12/15$916
This KAYAK deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/157:10 amORD - AAL
2 stops19h 10mScandinavian Airlines
Wed 1/72:35 pmAAL - ORD
1 stop33h 10mScandinavian Airlines
Deal found 12/13$942

Find flight deals from Illinois to Denmark

Keep the following information in mind while searching for Illinois to Denmark flight deals. Data was last updated December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$483
(Ticket)

One-way from

$235
(oojo)

Popular in

June

Cheapest in

January

Average price

$758

Good round-trip deal

$506 or less

Good one-way deal

$373 or less
Provider with most accurate pricing for Chicago (CHI)-Kastrup Copenhagen flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Kastrup Copenhagen flights.
Search Deals
From Illinois to Denmark
Search Deals
One-way flight from Illinois to Denmark
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($146 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Illinois to Denmark.
Search Deals
Price to beat on a one-way flight from Illinois to Denmark.
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated December 15, 2025.
Use the filters below to find and compare flights from Illinois to Denmark that are best for you.

Fly from

Illinois

Fly to

Denmark

Route

Depart

Return

Price

ChicagoAalborg

ORD - AAL

ORDAAL

Chicago O'Hare Intl

Mon 3/2

7:20 pm-11:55 pm

1 stop21h 35m

Aalborg

Fri 3/6

8:25 am-4:55 pm

1 stop15h 30m

$500

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Wed 2/25

6:00 pm-5:35 pm

1 stop16h 35m

Kastrup Copenhagen

Fri 2/27

6:50 am-3:20 pm

1 stop15h 30m

$505

ChicagoBillund

ORD - BLL

ORDBLL

Chicago O'Hare Intl

Wed 2/25

7:20 pm-11:55 pm

1 stop21h 35m

Billund

Sun 3/1

9:55 am-4:45 pm

1 stop13h 50m

$505

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Mon 3/23

10:50 pm-5:35 pm

1 stop12h 45m

Kastrup Copenhagen

Wed 3/25

1:05 pm-9:05 pm

1 stop14h 00m

$506

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Mon 3/23

10:50 pm-5:35 pm

1 stop12h 45m

Kastrup Copenhagen

Wed 3/25

6:50 am-8:10 pm

2 stops19h 20m

$509

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Fri 2/27

10:04 am-5:35 pm

2 stops24h 31m

Kastrup Copenhagen

Tue 3/24

1:00 pm-10:58 pm

2 stops39h 58m

$528

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Wed 3/25

1:37 pm-1:10 pm

2 stops17h 33m

Kastrup Copenhagen

Wed 4/1

11:50 am-2:15 pm

1 stop33h 25m

$533

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Tue 3/24

5:39 pm-1:10 pm

2 stops13h 31m

Kastrup Copenhagen

Tue 3/31

9:00 am-8:30 pm

1 stop18h 30m

$534

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Tue 3/17

5:39 pm-1:10 pm

2 stops13h 31m

Kastrup Copenhagen

Thu 4/2

6:00 am-2:15 pm

1 stop15h 15m

$534

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Mon 3/16

5:39 pm-1:10 pm

2 stops13h 31m

Kastrup Copenhagen

Tue 3/31

2:45 pm-2:30 pm

1 stop30h 45m

$534

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 50 results
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Best time to book a flight from Illinois to Denmark

Have a flexible travel schedule? Discover the best time to fly to Denmark from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Denmark

What is the cheapest month to book a flight from Illinois to Denmark?

Currently, February is the cheapest month in which you can book a flight from Illinois to Denmark (average of $397). Flying from Illinois to Denmark in June is currently the most expensive (average of $651). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to DK?

Find hourly flight availability from Illinois to Denmark. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 15, 2025.

It’s typically best to fly out from Illinois to Denmark in the morning. Doing so could potentially save you 29% on the flight price compared to flying in the afternoon, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from Illinois to Denmark. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Illinois to Denmark flight should consider departing on Saturday afternoons when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Denmark. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Illinois to Denmark?

    For as low as $506, Scandinavian Airlines can have you in Denmark from Illinois in 12h 45m. The distance between Illinois and Denmark is about 4256 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Illinois to Denmark one-way?

    To fly one-way, consider booking your trip with TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at $155. Icelandair flights start at $200 while deals on SWISS start at $271 one-way.

  • Can I find deals for flights from Illinois to Denmark that include hotel bookings?

    Yes. In addition to deals on Illinois to Denmark flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Denmark?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Denmark.

  • Can I find deals for business class flights from Illinois to Denmark?

    Yes. Cheapflights offers flight deals from Illinois to Denmark by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Denmark?

    Currently, February is the cheapest month in which you can book a flight from Illinois to Denmark (average of $397). Flying from Illinois to Denmark in June is currently the most expensive (average of $651). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Illinois to Denmark

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Illinois to Denmark

Discover the top 10 airlines that operate flights from Illinois to Denmark. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$421Average$606FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$454Average$779FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$489Average$766FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$496Average$831FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$508Average$690FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$540Average$683FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$541Average$705FlexibilityNo cancel feeOn-time67%
SWISSCheapest$548Average$792FlexibilityNo cancel feeOn-time79%
FinnairCheapest$580Average$746FlexibilityNo cancel feeOn-time76%
KLMCheapest$596Average$736FlexibilityNo cancel feeOn-time75%

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