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Denmark

$225+ 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 2/23. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — CPH
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This oojo deal was found by Cheapflights users on 1/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/87:25 pm
ORD
-
CPH
1 stop13h 30m
Icelandair
Fri 4/172:00 pm
CPH
-
ORD
1 stop14h 25m
Icelandair
Deal found 1/26$473
This Icelandair deal was found by Cheapflights users on 1/26. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/96:30 pm
ORD
-
CPH
1 stop10h 15m
Icelandair
Fri 2/1312:55 pm
CPH
-
ORD
1 stop11h 25m
Icelandair
Deal found 1/26$474
This KAYAK deal was found by Cheapflights users on 1/28. 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.
Tue 2/36:30 pm
ORD
-
CPH
1 stop18h 50m
Icelandair
Fri 2/1312:55 pm
CPH
-
ORD
1 stop11h 25m
Icelandair
Deal found 1/28$475
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/66:30 pm
ORD
-
CPH
1 stop27h 50m
Icelandair
Wed 2/1112:55 pm
CPH
-
ORD
1 stop11h 25m
Icelandair
Deal found 1/28$476
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/66:30 pm
ORD
-
CPH
1 stop27h 50m
Icelandair
Thu 2/128:50 pm
CPH
-
ORD
1 stop27h 30m
Icelandair
Deal found 1/28$477
This oojo deal was found by Cheapflights users on 1/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/77:25 pm
ORD
-
CPH
1 stop10h 30m
Icelandair
Sat 10/172:00 pm
CPH
-
ORD
1 stop11h 15m
Icelandair
Deal found 1/28$479
This oojo deal was found by Cheapflights users on 1/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/137:25 pm
ORD
-
CPH
1 stop10h 30m
Icelandair
Tue 10/204:55 pm
CPH
-
ORD
1 stop32h 20m
Icelandair
Deal found 1/27$480
This oojo deal was found by Cheapflights users on 1/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:25 pm
ORD
-
CPH
1 stop10h 30m
Icelandair
Sun 5/34:55 pm
CPH
-
ORD
1 stop11h 30m
Icelandair
Deal found 1/27$482
This CrystalTravel deal was found by Cheapflights users on 1/28. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/297:25 pm
ORD
-
CPH
1 stop13h 30m
Icelandair
Wed 5/132:00 pm
CPH
-
ORD
1 stop11h 15m
Icelandair
Deal found 1/28$484
This KAYAK deal was found by Cheapflights users on 1/28. 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.
Sun 3/16:30 pm
ORD
-
CPH
1 stop10h 15m
Icelandair
Sun 3/89:25 pm
CPH
-
ORD
1 stop26h 55m
Icelandair
Deal found 1/28$485
This oojo deal was found by Cheapflights users on 1/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/67:15 pm
ORD
-
AAR
2 stops15h 00m
Scandinavian Airlines
Mon 9/145:50 pm
AAR
-
ORD
2 stops29h 20m
Scandinavian Airlines
Deal found 1/28$543
This United Airlines deal was found by Cheapflights users on 1/26. 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.
Sun 2/153:20 pm
ORD
-
BLL
1 stop11h 40m
United Airlines
Thu 2/196:30 am
BLL
-
ORD
1 stop15h 50m
United Airlines
Deal found 1/26$543

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$473
(oojo)

One-way from

$225
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$515

Good round-trip deal

$495 or less

Good one-way deal

$379 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. 19% potential increase in price ($148 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 29, 2026.
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

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Fri 5/8

10:25 pm-3:55 pm

1 stop10h 30m

Kastrup Copenhagen

Fri 5/15

2:00 pm-6:15 pm

1 stop11h 15m

$533

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Tue 4/21

1:36 pm-1:20 pm

2 stops16h 44m

Kastrup Copenhagen

Thu 4/30

9:00 am-5:41 pm

1 stop15h 41m

$536

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Mon 3/30

9:40 pm-4:35 pm

1 stop11h 55m

Kastrup Copenhagen

Wed 4/8

6:20 am-11:00 am

1 stop11h 40m

$541

ChicagoBillund

ORD - BLL

ORDBLL

Chicago O'Hare Intl

Sun 2/15

3:20 pm-10:00 am

1 stop11h 40m

Billund

Thu 2/19

6:30 am-3:20 pm

1 stop15h 50m

$543

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Mon 3/30

10:40 am-6:45 am

1 stop13h 05m

Kastrup Copenhagen

Fri 4/3

9:00 am-5:10 pm

1 stop15h 10m

$545

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Wed 5/6

12:00 pm-10:50 am

2 stops15h 50m

Kastrup Copenhagen

Tue 5/12

10:10 am-7:55 pm

1 stop16h 45m

$546

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Sat 5/9

9:55 am-10:50 am

1 stop17h 55m

Kastrup Copenhagen

Tue 5/12

10:10 am-7:55 pm

1 stop16h 45m

$546

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Sat 3/28

3:55 pm-9:50 am

1 stop11h 55m

Kastrup Copenhagen

Fri 4/3

12:45 pm-5:45 pm

1 stop12h 00m

$547

ChicagoAalborg

ORD - AAL

ORDAAL

Chicago O'Hare Intl

Thu 2/19

7:20 pm-11:55 pm

1 stop21h 35m

Aalborg

Mon 2/23

7:00 am-4:45 pm

1 stop16h 45m

$548

ChicagoCopenhagen

ORD - CPH

ORDCPH

Chicago O'Hare Intl

Sun 5/10

10:25 pm-3:55 pm

1 stop10h 30m

Kastrup Copenhagen

Sat 5/16

2:00 pm-6:15 pm

1 stop11h 15m

$552

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 60 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 $419). Flying from Illinois to Denmark in June is currently the most expensive (average of $645). 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 January 29, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Denmark as you normally would.

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 $533, Icelandair can have you in Denmark from Illinois in 10h 30m. 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 $419). Flying from Illinois to Denmark in June is currently the most expensive (average of $645). 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

Browse thousands of different options on Cheapflights for your next trip

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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.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
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Newark to Charles de Gaulle flights
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John F Kennedy Intl to Gatwick flights
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Dulles Intl to Heathrow flights
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John F Kennedy Intl to Dublin flights
Dallas/Fort Worth to Heathrow flights
Miami to Madrid flights
Newark to Malpensa flights
John F Kennedy Intl to Malpensa flights
O'Hare Intl to Leonardo da Vinci/Fiumicino flights
Boston to Charles de Gaulle flights
John F Kennedy Intl to Stansted flights
John F Kennedy Intl to Istanbul flights
LaGuardia to Gatwick flights
Los Angeles to Charles de Gaulle flights
John F Kennedy Intl to Athens flights
Dulles Intl to Charles de Gaulle flights
John F Kennedy Intl to Barcelona-El Prat flights
LaGuardia to Leonardo da Vinci/Fiumicino flights
Seattle to Heathrow flights
O'Hare Intl to Charles de Gaulle flights
John F Kennedy Intl to Amsterdam flights
Baltimore to Heathrow flights
Boston to Leonardo da Vinci/Fiumicino flights
Dulles Intl to Leonardo da Vinci/Fiumicino flights
San Francisco to Charles de Gaulle flights
John F Kennedy Intl to Frederic Chopin flights
Newark to Lisbon flights
Newark to Amsterdam flights
Dallas/Fort Worth to Leonardo da Vinci/Fiumicino flights

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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$431Average$610FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$452Average$804FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$489Average$766FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$498Average$688FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$514Average$714FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$540Average$653FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$541Average$705FlexibilityNo cancel feeOn-time67%
SWISSCheapest$548Average$741FlexibilityNo cancel feeOn-time79%
FinnairCheapest$576Average$701FlexibilityNo cancel feeOn-time76%
KLMCheapest$596Average$736FlexibilityNo cancel feeOn-time75%

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