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$302+ 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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
CPH — ORD
Apr 7 — Apr 141
Mon 4/7
Mon 4/14
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 April 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$401
(Travelis)

One-way from

$302
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$557

Good round-trip deal

$726 or less

Good one-way deal

$682 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. 15% potential increase in price ($105 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 2, 2025.

This Travelis deal was found by Cheapflights users on 4/1. 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 Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/222:10 pmBLL - ORD
1 stop34h 40mFinnair
Mon 5/2610:25 pmORD - BLL
2 stops32h 00mFinnair
Deal found 4/1$401
This Finnair deal was found by Cheapflights users on 3/31. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/28:50 amCPH - ORD
1 stop16h 00mFinnair
Mon 5/59:30 pmORD - CPH
1 stop14h 10mFinnair
Deal found 3/31$444
This American Airlines deal was found by Cheapflights users on 4/1. 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.
Mon 4/281:15 pmCPH - ORD
1 stop11h 35mAmerican Airlines
Tue 5/65:40 pmORD - CPH
1 stop22h 40mAmerican Airlines
Deal found 4/1$446
This Flysmarter deal was found by Cheapflights users on 4/1. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/18:40 amCPH - ORD
2 stops17h 56mBritish Airways
Sat 9/134:42 pmORD - CPH
1 stop11h 33mBritish Airways
Deal found 4/1$452
This Flysmarter deal was found by Cheapflights users on 4/1. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1712:25 pmCPH - STL
2 stops16h 47mBritish Airways
Sun 4/275:27 pmSTL - CPH
2 stops22h 23mBritish Airways
Deal found 4/1$457
This Billigflug deal was found by Cheapflights users on 4/1. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/158:50 amCPH - ORD
1 stop16h 00mMultiple Airlines
Thu 5/2910:25 pmORD - CPH
1 stop18h 05mMultiple Airlines
Deal found 4/1$465
This British Airways deal was found by Cheapflights users on 3/31. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/175:05 pmBLL - ORD
2 stops23h 08mBritish Airways
Sun 9/281:19 pmORD - BLL
2 stops20h 01mBritish Airways
Deal found 3/31$489
This lol.travel deal was found by Cheapflights users on 4/1. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/112:45 pmCPH - STL
1 stop30h 51mAir Canada
Mon 5/57:30 amSTL - CPH
1 stop20h 20mAir Canada
Deal found 4/1$497
This United Airlines deal was found by Cheapflights users on 4/1. 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.
Thu 4/172:40 pmBLL - STL
2 stops32h 07mUnited Airlines
Mon 4/215:35 pmSTL - BLL
2 stops37h 25mUnited Airlines
Deal found 4/1$512
This United Airlines deal was found by Cheapflights users on 3/31. 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.
Fri 5/26:10 amCPH - ORD
2 stops19h 12mUnited Airlines
Mon 5/54:25 pmORD - CPH
2 stops14h 50mUnited Airlines
Deal found 3/31$513
This United Airlines deal was found by Cheapflights users on 4/1. 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.
Thu 4/1712:55 pmCPH - STL
3 stops33h 52mUnited Airlines
Sun 4/275:35 pmSTL - CPH
2 stops40h 45mUnited Airlines
Deal found 4/1$517
This Gotogate deal was found by Cheapflights users on 4/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/2410:35 pmCPH - ORD
1 stop26h 40mIcelandair
Thu 5/2910:15 pmORD - CPH
1 stop16h 30mIcelandair
Deal found 4/1$524

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 April 2, 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

Thu 5/22

2:10 pm-5:50 pm

1 stop34h 40m

Chicago O'Hare Intl

Mon 5/26

10:25 pm-1:25 pm

2 stops32h 00m

$401

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Fri 5/2

8:50 am-5:50 pm

1 stop16h 00m

Chicago O'Hare Intl

Mon 5/5

9:30 pm-6:40 pm

1 stop14h 10m

$444

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Mon 4/28

1:15 pm-5:50 pm

1 stop11h 35m

Chicago O'Hare Intl

Tue 5/6

5:40 pm-11:20 pm

1 stop22h 40m

$446

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Mon 9/1

8:40 am-7:36 pm

2 stops17h 56m

Chicago O'Hare Intl

Sat 9/13

4:42 pm-11:15 am

1 stop11h 33m

$452

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Thu 4/17

12:25 pm-10:12 pm

2 stops16h 47m

Lambert-St Louis

Sun 4/27

5:27 pm-10:50 pm

2 stops22h 23m

$457

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Thu 5/15

8:50 am-5:50 pm

1 stop16h 00m

Chicago O'Hare Intl

Thu 5/29

10:25 pm-11:30 pm

1 stop18h 05m

$465

BillundChicago

BLL - ORD

BLLORD

Billund

Wed 9/17

5:05 pm-9:13 am

2 stops23h 08m

Chicago O'Hare Intl

Sun 9/28

1:19 pm-4:20 pm

2 stops20h 01m

$489

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Thu 5/1

12:45 pm-12:36 pm

1 stop30h 51m

Lambert-St Louis

Mon 5/5

7:30 am-10:50 am

1 stop20h 20m

$497

BillundSt. Louis

BLL - STL

BLLSTL

Billund

Thu 4/17

2:40 pm-3:47 pm

2 stops32h 07m

Lambert-St Louis

Mon 4/21

5:35 pm-2:00 pm

2 stops37h 25m

$512

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Fri 5/2

6:10 am-6:22 pm

2 stops19h 12m

Chicago O'Hare Intl

Mon 5/5

4:25 pm-2:15 pm

2 stops14h 50m

$513

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Showing 1-10 of 51 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, August is the cheapest month in which you can book a flight from Denmark to Illinois (average of $245). Flying from Denmark to Illinois in March is currently the most expensive (average of $321). 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 April 2, 2025.

When flying from Denmark to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 April 2, 2025.
Get a feel of what it's like to fly with Delta, KLM and LOT from Denmark to Illinois by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,898 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,898 reviews
Delta
8.0
Very good
7,898 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,323 reviews
Delta
8.0
Very good
7,898 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
LOT
7.6
Good
1,065 reviews
Delta
8.0
Very good
7,898 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very good
7,898 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
SWISS
7.5
Good
1,572 reviews
Delta
8.0
Very good
7,898 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

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

    The cheapest airlines for a one-way flight from Denmark to Illinois are Air Serbia ($439), TAP AIR PORTUGAL ($443), and Finnair ($451).

  • 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, August is the cheapest month in which you can book a flight from Denmark to Illinois (average of $245). Flying from Denmark to Illinois in March is currently the most expensive (average of $321). 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 5 airlines flying from Denmark to Illinois

Discover the top 5 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 April 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$352Average$449FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$400Average$478FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$427Average$662FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$455Average$678FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$500Average$663FlexibilityNo cancel feeOn-time77%

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