HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$486+ Cheap flights from Denmark to Illinois

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
CPH — ORD
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Denmark to Illinois with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 junio 12, 2025.

Round-trip from

$486
(American Airlines)

Popular in

July

Cheapest in

February

Average price

$657

Good round-trip deal

$851 or less

Good one-way deal

$744 or less
From Denmark to Illinois
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($111 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals
Price to beat on a round-trip flight from Denmark to Illinois.
Search Deals
Price to beat on a one-way flight from Denmark to Illinois.
Search Deals

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 junio 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/11. 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.
mar. 11/2510:30 amCPH - STL
2 stops16h 30mAmerican Airlines
vie. 1/911:58 amSTL - CPH
2 stops16h 27mAmerican Airlines
Deal found 6/11$486
This Delta deal was found by Cheapflights users on 6/12. 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.
jue. 6/269:00 amCPH - STL
2 stops18h 40mDelta
sáb. 7/56:40 amSTL - CPH
2 stops16h 50mDelta
Deal found 6/12$488
This ResecentrumGruppen deal was found by Cheapflights users on 6/10. 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.
mié. 11/266:45 amCPH - STL
1 stop14h 10mLufthansa
mar. 12/91:27 pmSTL - CPH
2 stops16h 08mLufthansa
Deal found 6/10$492
This Flightsearch deal was found by Cheapflights users on 6/10. 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.
mié. 11/266:45 amCPH - STL
1 stop14h 10mMultiple Airlines
jue. 12/114:15 pmSTL - CPH
2 stops14h 45mMultiple Airlines
Deal found 6/10$494
This ResecentrumGruppen deal was found by Cheapflights users on 6/10. 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.
vie. 9/269:00 amCPH - STL
1 stop14h 00mAir France
sáb. 10/115:40 pmSTL - CPH
2 stops16h 10mAir France
Deal found 6/10$498
This Finnair deal was found by Cheapflights users on 6/10. 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.
vie. 9/267:25 pmCPH - STL
2 stops30h 02mFinnair
lun. 10/131:54 pmSTL - CPH
2 stops20h 01mFinnair
Deal found 6/10$506
This American Airlines deal was found by Cheapflights users on 6/11. 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.
mié. 6/182:00 pmCPH - ORD
1 stop33h 55mAmerican Airlines
dom. 6/229:36 pmORD - CPH
1 stop30h 39mAmerican Airlines
Deal found 6/11$506
This British Airways deal was found by Cheapflights users on 6/11. 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.
mié. 8/68:00 pmCPH - ORD
1 stop22h 55mBritish Airways
jue. 8/145:00 pmORD - CPH
1 stop23h 30mBritish Airways
Deal found 6/11$518
This United Airlines deal was found by Cheapflights users on 6/11. 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.
mié. 11/266:45 amCPH - STL
2 stops15h 41mUnited Airlines
mié. 12/313:15 pmSTL - CPH
2 stops15h 45mUnited Airlines
Deal found 6/11$520
This British Airways deal was found by Cheapflights users on 6/10. 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.
jue. 9/257:05 amCPH - STL
2 stops20h 20mBritish Airways
sáb. 10/111:22 pmSTL - CPH
2 stops16h 13mBritish Airways
Deal found 6/10$524
This Gotogate deal was found by Cheapflights users on 6/11. 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.
mié. 10/156:10 amCPH - ORD
2 stops15h 45mAir Canada
mar. 10/2110:40 amORD - CPH
2 stops15h 15mAir Canada
Deal found 6/11$527
This Travelis deal was found by Cheapflights users on 6/12. 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.
dom. 8/316:00 amBLL - STL
2 stops17h 47mKLM
vie. 9/124:40 pmSTL - BLL
2 stops14h 05mKLM
Deal found 6/12$529

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 junio 12, 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

mar. 11/25

10:30 am-8:00 pm

2 stops16h 30m

Lambert-St Louis

vie. 1/9

11:58 am-11:25 am

2 stops16h 27m

$486

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

jue. 6/26

9:00 am-8:40 pm

2 stops18h 40m

Lambert-St Louis

sáb. 7/5

6:40 am-6:30 am

2 stops16h 50m

$488

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

mié. 11/26

6:45 am-1:55 pm

1 stop14h 10m

Lambert-St Louis

mar. 12/9

1:27 pm-12:35 pm

2 stops16h 08m

$492

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

mié. 11/26

6:45 am-1:55 pm

1 stop14h 10m

Lambert-St Louis

jue. 12/11

4:15 pm-2:00 pm

2 stops14h 45m

$494

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

vie. 9/26

9:00 am-4:00 pm

1 stop14h 00m

Lambert-St Louis

sáb. 10/11

5:40 pm-4:50 pm

2 stops16h 10m

$498

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

vie. 9/26

7:25 pm-6:27 pm

2 stops30h 02m

Lambert-St Louis

lun. 10/13

1:54 pm-4:55 pm

2 stops20h 01m

$506

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

mié. 8/6

8:00 pm-11:55 am

1 stop22h 55m

Chicago O'Hare Intl

jue. 8/14

5:00 pm-11:30 pm

1 stop23h 30m

$518

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

mié. 11/26

6:45 am-3:26 pm

2 stops15h 41m

Lambert-St Louis

mié. 12/31

3:15 pm-2:00 pm

2 stops15h 45m

$520

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

jue. 9/25

7:05 am-8:25 pm

2 stops20h 20m

Lambert-St Louis

sáb. 10/11

1:22 pm-12:35 pm

2 stops16h 13m

$524

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

mié. 10/15

6:10 am-2:55 pm

2 stops15h 45m

Chicago O'Hare Intl

mar. 10/21

10:40 am-8:55 am

2 stops15h 15m

$527

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 48 results
1
2
3
...
5

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 junio 12, 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 junio 12, 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
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
LOT
7.6
Good
1,077 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Austrian Airlines
7.6
Good
802 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,290 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 ($537), LOT ($545), and British Airways ($550).

  • 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Denmark to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Charles de Gaulle to John F Kennedy Intl flights
Charles de Gaulle to Newark flights
Heathrow to John F Kennedy Intl flights
Heathrow to Newark flights
Orly to Newark flights
Frankfurt to Newark flights
Frankfurt to John F Kennedy Intl flights
Orly to John F Kennedy Intl flights
Charles de Gaulle to LaGuardia flights
Heathrow to LaGuardia flights
Charles de Gaulle to Miami flights
London City to John F Kennedy Intl flights
Gatwick to Newark flights
Gatwick to John F Kennedy Intl flights
Bruxelles-National to John F Kennedy Intl flights
Bruxelles-National to Newark flights
Gatwick to LaGuardia flights
Madrid to John F Kennedy Intl flights
Charles de Gaulle to Stewart flights
Madrid to Newark flights
London City to Newark flights
Frankfurt to Los Angeles flights
Charles de Gaulle to Los Angeles flights
Frankfurt to LaGuardia flights
Dublin to John F Kennedy Intl flights
Dublin to Newark flights
Frederic Chopin to John F Kennedy Intl flights
Malpensa to Newark flights
Barcelona-El Prat to Newark flights
Leonardo da Vinci/Fiumicino to Newark flights
Malpensa to John F Kennedy Intl flights
Stansted to John F Kennedy Intl flights
Munich to John F Kennedy Intl flights
Heathrow to Los Angeles flights
Leonardo da Vinci/Fiumicino to John F Kennedy Intl flights
Barcelona-El Prat to John F Kennedy Intl flights
Heathrow to Boston flights
Frederic Chopin to Newark flights
Vienna to Newark flights
Madrid to Miami flights
Frankfurt to Miami flights
Berlin to Newark flights
Amsterdam to John F Kennedy Intl flights
Luton to John F Kennedy Intl flights
Vienna to John F Kennedy Intl flights
Munich to Newark flights
Zurich to John F Kennedy Intl flights
Charles de Gaulle to San Francisco flights
Orly to Miami flights

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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$352Average$449FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$406Average$526FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$427Average$704FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$484Average$678FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$502Average$728FlexibilityNo cancel feeOn-time77%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.