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$317+ 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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
CPH — ORD
ene. 26 — feb. 21
dom. 1/26
dom. 2/2
1 adult, Economy
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Cheap flight deals from Denmark to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Denmark (DK0) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated enero 21, 2025.

Round-trip from

$396
(Ticket)

One-way from

$317
(Mytrip)

Good round-trip deal

$546 or less

Good one-way deal

$629 or less
From Denmark to Illinois
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One-way flight from Denmark to Illinois
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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 enero 21, 2025.

This Ticket deal was found by Cheapflights users on 1/20. 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.
mié. 2/124:15 pmBLL - STL
2 stops31h 18mBritish Airways
mié. 2/1912:00 pmSTL - BLL
2 stops20h 20mBritish Airways
Deal found 1/20$396
This Ticket deal was found by Cheapflights users on 1/20. 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.
mié. 2/126:30 amBLL - STL
1 stop14h 25mLufthansa
mié. 2/191:03 pmSTL - BLL
2 stops16h 27mLufthansa
Deal found 1/20$398
This Ticket deal was found by Cheapflights users on 1/21. 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.
dom. 3/166:50 amCPH - ORD
1 stop16h 50mBritish Airways
mar. 4/19:15 pmORD - CPH
1 stop29h 35mBritish Airways
Deal found 1/21$405
This Ticket deal was found by Cheapflights users on 1/21. 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.
dom. 3/166:50 amCPH - ORD
1 stop16h 50mMultiple Airlines
mar. 4/110:25 pmORD - CPH
2 stops17h 45mMultiple Airlines
Deal found 1/21$410
This American Airlines deal was found by Cheapflights users on 1/21. 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.
lun. 4/218:40 amCPH - ORD
1 stop16h 10mAmerican Airlines
mié. 4/307:15 pmORD - CPH
1 stop17h 50mAmerican Airlines
Deal found 1/21$425
This Finnair deal was found by Cheapflights users on 1/21. 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.
lun. 3/2412:45 pmCPH - ORD
1 stop13h 00mFinnair
lun. 3/315:55 pmORD - CPH
1 stop12h 40mFinnair
Deal found 1/21$427
This United Airlines deal was found by Cheapflights users on 1/20. 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.
vie. 2/286:50 amCPH - STL
2 stops39h 16mUnited Airlines
mié. 3/58:05 amSTL - CPH
2 stops22h 55mUnited Airlines
Deal found 1/20$433
This Flybillet deal was found by Cheapflights users on 1/19. 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 Flybillet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 2/26:50 amCPH - STL
1 stop14h 05mLufthansa
dom. 2/91:02 pmSTL - CPH
2 stops26h 48mLufthansa
Deal found 1/19$442
This Mytrip deal was found by Cheapflights users on 1/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/710:35 pmCPH - ORD
1 stop29h 40mIcelandair
mié. 1/76:30 pmORD - CPH
1 stop18h 20mIcelandair
Deal found 1/21$442
This British Airways deal was found by Cheapflights users on 1/21. 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.
vie. 2/286:45 amCPH - STL
2 stops22h 18mBritish Airways
mié. 3/510:49 amSTL - CPH
2 stops17h 31mBritish Airways
Deal found 1/21$449
This LATAM Airlines deal was found by Cheapflights users on 1/21. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 2/286:50 amCPH - STL
1 stop14h 05mMultiple Airlines
mié. 3/53:45 pmSTL - CPH
1 stop14h 45mMultiple Airlines
Deal found 1/21$453
This American Airlines deal was found by Cheapflights users on 1/21. 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. 2/134:05 pmBLL - ORD
1 stop31h 55mAmerican Airlines
lun. 2/176:26 pmORD - BLL
1 stop13h 39mAmerican Airlines
Deal found 1/21$459

Find flights from Denmark to Illinois within your budget

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 enero 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BillundSt. Louis

BLL - STL

BLLSTL

Billund

mié. 2/12

4:15 pm-4:33 pm

2 stops31h 18m

Lambert-St Louis

mié. 2/19

12:00 pm-3:20 pm

2 stops20h 20m

$396

BillundSt. Louis

BLL - STL

BLLSTL

Billund

mié. 2/12

6:30 am-1:55 pm

1 stop14h 25m

Lambert-St Louis

mié. 2/19

1:03 pm-12:30 pm

2 stops16h 27m

$398

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

lun. 2/24

6:40 am-2:45 pm

1 stop15h 05m

Chicago O'Hare Intl

lun. 3/10

7:30 pm-5:25 pm

1 stop15h 55m

$405

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

lun. 2/24

8:50 pm-5:20 pm

1 stop27h 30m

Chicago O'Hare Intl

lun. 3/10

7:30 pm-7:50 pm

1 stop18h 20m

$418

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

dom. 3/16

6:50 am-5:40 pm

1 stop16h 50m

Chicago O'Hare Intl

mar. 4/1

5:55 pm-6:40 pm

2 stops17h 45m

$421

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

jue. 3/6

3:15 pm-1:55 pm

1 stop29h 40m

Chicago O'Hare Intl

dom. 3/9

7:30 pm-2:20 pm

1 stop12h 50m

$426

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

vie. 2/28

6:50 am-3:06 pm

2 stops39h 16m

Lambert-St Louis

mié. 3/5

8:05 am-2:00 pm

2 stops22h 55m

$433

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

jue. 3/6

8:40 am-7:24 pm

2 stops17h 44m

Chicago O'Hare Intl

dom. 3/9

7:30 pm-1:30 pm

1 stop12h 00m

$435

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

lun. 2/24

7:00 am-7:37 pm

2 stops19h 37m

Chicago O'Hare Intl

lun. 3/10

8:30 pm-9:05 am

1 stop30h 35m

$441

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

dom. 2/2

6:50 am-1:55 pm

1 stop14h 05m

Lambert-St Louis

dom. 2/9

1:02 pm-10:50 pm

2 stops26h 48m

$442

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 44 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.

Travel insights for flights from Denmark to Illinois

Get recent, data-driven insights about flights from Denmark to Illinois including ideal travel times, pricing trends, and more.

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 $320). 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 enero 21, 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 enero 21, 2025.
Get a feel of what it's like to fly with Lufthansa, Scandinavian Airlines 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
8,521 reviews

Crew

8.6

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Comfort

8.0

Reviews

1 / 10

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

Delta
8.0
Very good
8,521 reviews
Delta
8.0
Very good
8,521 reviews

Crew

8.6

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Comfort

8.0

Reviews

1 / 10

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

KLM
7.8
Good
1,341 reviews
Delta
8.0
Very good
8,521 reviews

Crew

8.6

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Comfort

8.0

Reviews

1 / 10

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

LOT
7.6
Good
1,117 reviews
Delta
8.0
Very good
8,521 reviews

Crew

8.6

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Comfort

8.0

Reviews

1 / 10

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

Finnair
7.6
Good
1,286 reviews
Delta
8.0
Very good
8,521 reviews

Crew

8.6

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Comfort

8.0

Reviews

1 / 10

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

SWISS
7.5
Good
1,600 reviews
Delta
8.0
Very good
8,521 reviews

Crew

8.6

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Comfort

8.0

Reviews

1 / 10

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 Icelandair ($387), Finnair ($412), and Air Serbia ($421).

  • 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 $320). 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 7 airlines flying from Denmark to Illinois

Discover the top 7 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 enero 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$352Average$449FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$401Average$505FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$405Average$510FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$427Average$646FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$455Average$678FlexibilityNo cancel feeOn-time76%
KLMCheapest$463Average$801FlexibilityNo cancel feeOn-time75%
Scandinavian AirlinesCheapest$499Average$610FlexibilityNo cancel feeOn-time77%
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