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$309+ 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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
CPH — ORD
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
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 September 15, 2025.

Round-trip from

$461
(Mytrip)

One-way from

$309
(Flysmarter)

Popular in

July

Cheapest in

February

Average price

$554

Good round-trip deal

$667 or less

Good one-way deal

$677 or less
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. 14% potential increase in price ($104 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 15, 2025.

This Mytrip deal was found by Cheapflights users on 9/14. 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.
Tue 10/1410:35 pmCPH - ORD
1 stop29h 40mIcelandair
Tue 10/217:25 pmORD - CPH
1 stop19h 20mIcelandair
Deal found 9/14$461
This oojo deal was found by Cheapflights users on 9/14. 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.
Thu 11/201:05 pmCPH - ORD
1 stop11h 15mIcelandair
Sat 11/296:30 pmORD - CPH
1 stop19h 05mIcelandair
Deal found 9/14$462
This Travelis deal was found by Cheapflights users on 9/14. 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.
Fri 10/318:40 amCPH - STL
2 stops18h 11mFinnair
Wed 11/51:20 pmSTL - CPH
2 stops19h 55mFinnair
Deal found 9/14$466
This Ticket deal was found by Cheapflights users on 9/13. 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.
Sat 11/16:15 amCPH - ORD
1 stop17h 30mBritish Airways
Fri 11/142:03 pmORD - CPH
2 stops22h 07mBritish Airways
Deal found 9/13$474
This Ticket deal was found by Cheapflights users on 9/14. 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.
Sat 11/12:30 pmCPH - ORD
Nonstop9h 15mScandinavian Airlines
Fri 11/147:20 pmORD - CPH
Nonstop8h 05mScandinavian Airlines
Deal found 9/14$475
This Flysmarter deal was found by Cheapflights users on 9/15. 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.
Sat 11/110:35 amCPH - ORD
1 stop13h 10mMultiple Airlines
Fri 11/143:08 pmORD - CPH
2 stops15h 37mMultiple Airlines
Deal found 9/15$481
This Gotogate deal was found by Cheapflights users on 9/13. 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.
Thu 10/24:45 pmCPH - ORD
1 stop32h 30mIcelandair
Thu 2/196:30 pmORD - CPH
1 stop18h 20mIcelandair
Deal found 9/13$485
This American Airlines deal was found by Cheapflights users on 9/15. 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 11/178:40 amCPH - ORD
2 stops18h 00mAmerican Airlines
Mon 11/246:25 pmORD - CPH
1 stop17h 40mAmerican Airlines
Deal found 9/15$486
This Flysmarter deal was found by Cheapflights users on 9/14. 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.
Tue 10/217:20 amCPH - ORD
2 stops19h 51mMultiple Airlines
Sun 10/269:45 pmORD - CPH
1 stop18h 00mMultiple Airlines
Deal found 9/14$487
This Flysmarter deal was found by Cheapflights users on 9/14. 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.
Wed 11/126:55 amCPH - STL
2 stops18h 30mBritish Airways
Tue 11/256:45 pmSTL - CPH
2 stops15h 10mBritish Airways
Deal found 9/14$488
This American Airlines deal was found by Cheapflights users on 9/13. 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.
Fri 12/2610:35 amCPH - ORD
1 stop13h 25mAmerican Airlines
Thu 1/299:45 pmORD - CPH
1 stop12h 35mAmerican Airlines
Deal found 9/13$488
This American Airlines deal was found by Cheapflights users on 9/15. 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.
Sat 11/16:15 amCPH - ORD
1 stop17h 30mAmerican Airlines
Fri 11/143:08 pmORD - CPH
2 stops15h 37mAmerican Airlines
Deal found 9/15$490

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 September 15, 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

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Tue 10/14

7:20 am-5:00 pm

1 stop16h 40m

Chicago O'Hare Intl

Tue 10/21

1:43 pm-1:05 pm

2 stops16h 22m

$485

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 11/16

6:55 am-5:54 pm

2 stops17h 59m

Lambert-St Louis

Tue 11/25

1:20 pm-1:15 pm

2 stops16h 55m

$488

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Sat 11/1

6:15 am-5:45 pm

1 stop17h 30m

Chicago O'Hare Intl

Fri 11/14

3:08 pm-1:45 pm

2 stops15h 37m

$494

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Wed 10/8

4:15 pm-3:45 pm

2 stops30h 30m

Lambert-St Louis

Tue 10/21

8:04 pm-11:20 pm

2 stops20h 16m

$495

BillundChicago

BLL - ORD

BLLORD

Billund

Sat 11/8

1:05 pm-6:45 pm

1 stop12h 40m

Chicago O'Hare Intl

Wed 11/12

6:30 pm-7:50 pm

1 stop18h 20m

$496

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Thu 12/4

10:30 am-11:58 pm

2 stops20h 28m

Lambert-St Louis

Mon 12/8

2:54 pm-11:30 am

2 stops13h 36m

$496

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Sat 11/1

10:35 am-8:28 pm

2 stops15h 53m

Chicago O'Hare Intl

Fri 11/14

3:43 pm-1:45 pm

2 stops15h 02m

$504

CopenhagenChicago

CPH - ORD

CPHORD

Kastrup Copenhagen

Thu 10/30

6:45 am-5:34 pm

2 stops16h 49m

Chicago O'Hare Intl

Thu 11/6

4:06 pm-2:25 pm

2 stops15h 19m

$504

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Wed 10/8

6:10 am-3:44 pm

2 stops16h 34m

Lambert-St Louis

Wed 10/22

12:25 pm-12:00 pm

2 stops16h 35m

$506

BillundSt. Louis

BLL - STL

BLLSTL

Billund

Thu 12/4

8:40 pm-8:51 pm

2 stops31h 11m

Lambert-St Louis

Mon 12/8

4:49 pm-12:30 pm

2 stops36h 41m

$509

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 56 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 September 15, 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.

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 September 15, 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
1,484 reviews

Food

6.7

Entertainment

6.7

Boarding

7.7

Crew

8.0

Comfort

7.3

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu
Scandinavian Airlines
7.4
Good
1,484 reviews
Scandinavian Airlines
7.4
Good
1,484 reviews

Food

6.7

Entertainment

6.7

Boarding

7.7

Crew

8.0

Comfort

7.3

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu
United Airlines
7.4
Good
8,931 reviews
Scandinavian Airlines
7.4
Good
1,484 reviews

Food

6.7

Entertainment

6.7

Boarding

7.7

Crew

8.0

Comfort

7.3

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu
American Airlines
7.2
Good
10,000 reviews
Scandinavian Airlines
7.4
Good
1,484 reviews

Food

6.7

Entertainment

6.7

Boarding

7.7

Crew

8.0

Comfort

7.3

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu
Lufthansa
6.8
Okay
7,409 reviews
Scandinavian Airlines
7.4
Good
1,484 reviews

Food

6.7

Entertainment

6.7

Boarding

7.7

Crew

8.0

Comfort

7.3

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu
British Airways
6.7
Okay
7,361 reviews
Scandinavian Airlines
7.4
Good
1,484 reviews

Food

6.7

Entertainment

6.7

Boarding

7.7

Crew

8.0

Comfort

7.3

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu

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 16h 34m. There are 4511 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, 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 3 airlines flying from Denmark to Illinois

Discover the top 3 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$460Average$662FlexibilityNo cancel feeOn-time69%
Scandinavian AirlinesCheapest$516Average$851FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$530Average$755FlexibilityNo cancel feeOn-time76%

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