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$321+ Cheap flights from Denmark to Illinois

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 3/19. Fares are subject to change and may not be available on all flights or dates of travel.
CPH — ORD
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Denmark to Illinois

Keep the following information in mind while searching for Denmark to Illinois flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$477
(Cheapflightsfares)

One-way from

$321
(Finnair)

Popular in

July

Cheapest in

February

Average price

$569

Good round-trip deal

$883 or less

Good one-way deal

$601 or less
Provider with most accurate pricing for Kastrup Copenhagen-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Kastrup Copenhagen-Chicago (CHI) flights.
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From Denmark to Illinois
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One-way flight from Denmark to Illinois
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Highest demand for flights based on searches. 13% potential increase in price ($96 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Denmark to Illinois.
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Price to beat on a one-way flight from Denmark to Illinois.
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Find flight deals from Denmark to Illinois

Cheapest flights from Denmark to Illinois
Explore the most affordable flight options available from Denmark to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Ticket deal was found by Cheapflights users on 10/28. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/176:00 amBLL - ORD
1 stop15h 20mAir France
Mon 11/245:20 pmORD - BLL
1 stop14h 15mAir France
Deal found 10/28$477
This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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.
Fri 12/122:30 pmCPH - ORD
Nonstop9h 15mScandinavian Airlines
Sun 12/287:20 pmORD - CPH
Nonstop8h 05mScandinavian Airlines
Deal found 10/30$477
This Ticket deal was found by Cheapflights users on 10/28. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/176:00 amBLL - ORD
1 stop15h 20mMultiple Airlines
Mon 11/241:25 pmORD - BLL
2 stops13h 15mMultiple Airlines
Deal found 10/28$485
This ResecentrumGruppen deal was found by Cheapflights users on 10/28. 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 ResecentrumGruppen is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1712:30 pmCPH - ORD
1 stop14h 35mLufthansa
Sun 11/309:50 pmORD - CPH
1 stop18h 15mLufthansa
Deal found 10/28$485
This Flightnetwork deal was found by Cheapflights users on 10/29. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/52:30 pmCPH - ORD
Nonstop9h 15mScandinavian Airlines
Sun 12/77:20 pmORD - CPH
Nonstop8h 05mScandinavian Airlines
Deal found 10/29$486
This ResecentrumGruppen deal was found by Cheapflights users on 10/29. 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 ResecentrumGruppen is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/179:55 amCPH - ORD
1 stop11h 25mMultiple Airlines
Sun 11/305:20 pmORD - CPH
1 stop14h 20mMultiple Airlines
Deal found 10/29$489
This Ticket deal was found by Cheapflights users on 10/28. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/176:00 amCPH - ORD
1 stop15h 20mKLM
Sun 11/304:25 pmORD - CPH
1 stop11h 45mKLM
Deal found 10/28$491
This Iberia deal was found by Cheapflights users on 10/29. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1410:35 amCPH - ORD
1 stop13h 25mMultiple Airlines
Tue 11/186:30 pmORD - CPH
1 stop11h 45mMultiple Airlines
Deal found 10/29$492
This American Airlines deal was found by Cheapflights users on 10/30. 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.
Wed 12/106:55 amCPH - ORD
1 stop17h 05mAmerican Airlines
Sun 9/68:30 pmORD - CPH
1 stop17h 25mAmerican Airlines
Deal found 10/30$494
This Delta deal was found by Cheapflights users on 10/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/269:55 amCPH - ORD
1 stop11h 25mDelta
Wed 12/35:20 pmORD - CPH
1 stop14h 20mDelta
Deal found 10/28$495
This Scandinavian Airlines deal was found by Cheapflights users on 10/30. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/222:30 pmCPH - ORD
Nonstop9h 15mScandinavian Airlines
Sun 12/287:20 pmORD - CPH
Nonstop8h 05mScandinavian Airlines
Deal found 10/30$497
This FlightHub deal was found by Cheapflights users on 10/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/222:30 pmCPH - ORD
Nonstop9h 15mScandinavian Airlines
Mon 12/297:20 pmORD - CPH
Nonstop8h 05mScandinavian Airlines
Deal found 10/29$498

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
Use the filters below to find and compare flights from Denmark to Illinois that are best for you.

Fly from

Denmark

Fly to

Illinois

Route

Depart

Return

Price

BillundChicago

BLL - ORD

BLLORD

Billund

Mon 11/17

6:00 am-2:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Mon 11/24

5:20 pm-2:35 pm

1 stop14h 15m

$477

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Thu 3/26

10:30 am-7:45 pm

1 stop15h 15m

Chicago O'Hare Intl

Wed 6/10

7:05 pm-11:30 pm

1 stop21h 25m

$494

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Tue 3/24

6:25 am-2:50 pm

1 stop14h 25m

Chicago O'Hare Intl

Wed 6/10

7:05 pm-11:30 pm

1 stop21h 25m

$494

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Mon 3/23

8:25 pm-2:50 pm

1 stop24h 25m

Chicago O'Hare Intl

Tue 6/9

7:05 pm-7:15 pm

1 stop17h 10m

$494

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Sun 3/22

6:40 pm-2:50 pm

1 stop26h 10m

Chicago O'Hare Intl

Tue 6/9

7:05 pm-3:25 pm

1 stop13h 20m

$494

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Tue 3/24

6:25 am-2:50 pm

1 stop14h 25m

Chicago O'Hare Intl

Mon 6/8

7:05 pm-1:35 pm

1 stop11h 30m

$494

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Wed 3/25

8:05 pm-2:50 pm

1 stop24h 45m

Chicago O'Hare Intl

Tue 6/9

7:05 pm-7:15 pm

1 stop17h 10m

$494

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Wed 11/26

9:55 am-2:20 pm

1 stop11h 25m

Chicago O'Hare Intl

Wed 12/3

5:20 pm-2:40 pm

1 stop14h 20m

$495

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Fri 11/14

9:55 am-2:20 pm

1 stop11h 25m

Chicago O'Hare Intl

Tue 11/18

2:35 pm-1:10 pm

2 stops15h 35m

$502

BillundChicago

BLL - ORD

BLLORD

Billund

Mon 11/17

6:00 am-2:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Mon 11/24

5:20 pm-2:35 pm

1 stop14h 15m

$505

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 46 results
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Best time to book a flight from Denmark to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Denmark 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 Denmark to Illinois

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

Currently, January is the cheapest month in which you can book a flight from Denmark to Illinois (average of $368). Flying from Denmark to Illinois in July is currently the most expensive (average of $542). 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 DK to IL?

Find hourly flight availability from Denmark to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 42% on flights from Denmark to Illinois by exploring options for tickets in the evening.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated October 30, 2025.
See what other customers who have flown with Scandinavian Airlines, United Airlines, and American Airlines from Denmark to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Scandinavian Airlines
7.4
Good
1,548 reviews

Food

6.6

Crew

8.0

Comfort

7.3

Overall

7.4

Boarding

7.6

Entertainment

6.6

Reviews

1 / 20
8.0
Excellent

Scott,Sep 2025

CPH - LAX

Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.
Scandinavian Airlines
7.4
Good
1,548 reviews
Scandinavian Airlines
7.4
Good
1,548 reviews

Food

6.6

Crew

8.0

Comfort

7.3

Overall

7.4

Boarding

7.6

Entertainment

6.6

Reviews

1 / 20
8.0
Excellent

Scott,Sep 2025

CPH - LAX

Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.
United Airlines
7.4
Good
8,996 reviews
Scandinavian Airlines
7.4
Good
1,548 reviews

Food

6.6

Crew

8.0

Comfort

7.3

Overall

7.4

Boarding

7.6

Entertainment

6.6

Reviews

1 / 20
8.0
Excellent

Scott,Sep 2025

CPH - LAX

Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.
American Airlines
7.2
Good
11,034 reviews
Scandinavian Airlines
7.4
Good
1,548 reviews

Food

6.6

Crew

8.0

Comfort

7.3

Overall

7.4

Boarding

7.6

Entertainment

6.6

Reviews

1 / 20
8.0
Excellent

Scott,Sep 2025

CPH - LAX

Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.
Icelandair
7.1
Good
562 reviews
Scandinavian Airlines
7.4
Good
1,548 reviews

Food

6.6

Crew

8.0

Comfort

7.3

Overall

7.4

Boarding

7.6

Entertainment

6.6

Reviews

1 / 20
8.0
Excellent

Scott,Sep 2025

CPH - LAX

Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.
Lufthansa
6.8
Okay
7,542 reviews
Scandinavian Airlines
7.4
Good
1,548 reviews

Food

6.6

Crew

8.0

Comfort

7.3

Overall

7.4

Boarding

7.6

Entertainment

6.6

Reviews

1 / 20
8.0
Excellent

Scott,Sep 2025

CPH - LAX

Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.

Related info for your journey

Find useful and relevant information for your journey from Denmark to Illinois. 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 Denmark to Illinois?

    Departing from Denmark to Illinois will take you 15h 15m. There are 4256 mi between Denmark and Illinois. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Denmark to Illinois 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 Denmark to Illinois?

    Currently, January is the cheapest month in which you can book a flight from Denmark to Illinois (average of $368). Flying from Denmark to Illinois in July is currently the most expensive (average of $542). 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 Denmark to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Denmark to Illinois

Discover the top 4 airlines that operate flights from Denmark to Illinois. 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$364Average$520FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$460Average$653FlexibilityNo cancel feeOn-time69%
Scandinavian AirlinesCheapest$520Average$809FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$530Average$768FlexibilityNo cancel feeOn-time76%

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