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$445+ 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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
CPH — ORD
may. 6 — may. 131
mar. 5/6
mar. 5/13
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 mayo 1, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$453
(Ticket)

One-way from

$445
(Cheapflightsfares)

Popular in

July

Cheapest in

February

Average price

$534

Good round-trip deal

$675 or less

Good one-way deal

$630 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 ($104 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 May 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 mayo 1, 2025.

This Ticket deal was found by Cheapflights users on 4/29. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/127:25 pmCPH - STL
2 stops35h 29mFinnair
sáb. 8/234:18 pmSTL - CPH
2 stops23h 52mFinnair
Deal found 4/29$453
This oojo deal was found by Cheapflights users on 4/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/217:20 amCPH - ORD
1 stop17h 55mIcelandair
mar. 8/267:25 pmORD - CPH
1 stop19h 20mIcelandair
Deal found 4/29$456
This Ticket deal was found by Cheapflights users on 4/29. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/56:00 amCPH - ORD
1 stop15h 10mMultiple Airlines
sáb. 6/2110:50 amORD - CPH
1 stop16h 15mMultiple Airlines
Deal found 4/29$459
This AirNGo deal was found by Cheapflights users on 4/30. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/56:00 amCPH - ORD
1 stop15h 10mKLM
sáb. 6/213:58 pmORD - CPH
1 stop11h 07mKLM
Deal found 4/30$462
This Flightsearch deal was found by Cheapflights users on 4/29. 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 Flightsearch is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/122:00 pmCPH - STL
1 stop13h 19mBritish Airways
sáb. 8/234:18 pmSTL - CPH
2 stops24h 17mBritish Airways
Deal found 4/29$463
This Finnair deal was found by Cheapflights users on 4/29. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/167:25 amBLL - ORD
2 stops18h 52mFinnair
jue. 9/410:35 pmORD - BLL
2 stops25h 10mFinnair
Deal found 4/29$466
This Ticket deal was found by Cheapflights users on 4/29. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/57:05 amCPH - ORD
2 stops19h 25mBritish Airways
sáb. 6/211:40 pmORD - CPH
2 stops26h 55mBritish Airways
Deal found 4/29$468
This Ticket deal was found by Cheapflights users on 4/30. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/55:00 pmCPH - ORD
2 stops25h 55mFinnair
sáb. 6/219:30 pmORD - CPH
1 stop11h 45mFinnair
Deal found 4/30$470
This British Airways deal was found by Cheapflights users on 4/29. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/165:05 pmBLL - ORD
2 stops23h 08mBritish Airways
sáb. 9/277:10 pmORD - BLL
1 stop12h 35mBritish Airways
Deal found 4/29$474
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/2112:25 pmCPH - ORD
1 stop12h 25mAmerican Airlines
mié. 8/2711:43 amORD - CPH
2 stops16h 32mAmerican Airlines
Deal found 4/29$477
This Delta deal was found by Cheapflights users on 4/28. 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.
lun. 6/29:20 amCPH - ORD
1 stop11h 50mDelta
lun. 6/97:00 amORD - CPH
1 stop16h 30mDelta
Deal found 4/28$482
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 6/132:00 pmCPH - STL
1 stop34h 07mAmerican Airlines
sáb. 8/234:18 pmSTL - CPH
2 stops16h 57mAmerican Airlines
Deal found 4/29$484

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 mayo 1, 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

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

jue. 6/12

7:25 pm-11:54 pm

2 stops35h 29m

Lambert-St Louis

sáb. 8/23

4:18 pm-11:10 pm

2 stops23h 52m

$453

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

jue. 8/21

7:20 am-6:15 pm

1 stop17h 55m

Chicago O'Hare Intl

mar. 8/26

7:25 pm-9:45 pm

1 stop19h 20m

$456

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

jue. 6/5

6:00 am-2:10 pm

1 stop15h 10m

Chicago O'Hare Intl

sáb. 6/21

10:50 am-10:05 am

1 stop16h 15m

$459

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

jue. 6/5

6:00 am-2:10 pm

1 stop15h 10m

Chicago O'Hare Intl

sáb. 6/21

3:58 pm-10:05 am

1 stop11h 07m

$462

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

jue. 6/12

2:00 pm-8:19 pm

1 stop13h 19m

Lambert-St Louis

sáb. 8/23

4:18 pm-11:35 pm

2 stops24h 17m

$463

BillundChicago

BLL - ORD

BLLORD

Billund

sáb. 8/16

7:25 am-7:17 pm

2 stops18h 52m

Chicago O'Hare Intl

jue. 9/4

10:35 pm-6:45 am

2 stops25h 10m

$466

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

jue. 6/5

7:05 am-7:30 pm

2 stops19h 25m

Chicago O'Hare Intl

sáb. 6/21

1:40 pm-11:35 pm

2 stops26h 55m

$468

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

jue. 6/5

5:00 pm-11:55 am

2 stops25h 55m

Chicago O'Hare Intl

sáb. 6/21

9:30 pm-4:15 pm

1 stop11h 45m

$470

BillundChicago

BLL - ORD

BLLORD

Billund

mar. 9/16

5:05 pm-9:13 am

2 stops23h 08m

Chicago O'Hare Intl

sáb. 9/27

7:10 pm-2:45 pm

1 stop12h 35m

$474

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

jue. 8/21

12:25 pm-5:50 pm

1 stop12h 25m

Chicago O'Hare Intl

mié. 8/27

11:43 am-11:15 am

2 stops16h 32m

$477

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 50 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 mayo 1, 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 mayo 1, 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
7,934 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

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
7,934 reviews
Delta
8.0
Very good
7,934 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

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
1,334 reviews
Delta
8.0
Very good
7,934 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

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
1,069 reviews
Delta
8.0
Very good
7,934 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

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
1,275 reviews
Delta
8.0
Very good
7,934 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

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
Austrian Airlines
7.6
Good
780 reviews
Delta
8.0
Very good
7,934 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

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 ($445), Finnair ($469), and British Airways ($482).

  • 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 mayo 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$352Average$449FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$400Average$464FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$427Average$705FlexibilityNo cancel feeOn-time69%
Scandinavian AirlinesCheapest$502Average$679FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$559Average$696FlexibilityNo cancel feeOn-time76%

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