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$451+ Cheap flights from Billund (BLL) 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 1/17. Fares are subject to change and may not be available on all flights or dates of travel.
BLL — ORD
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
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Find flight deals from Billund to Illinois

Cheapest flights from Billund to Illinois
Explore the most affordable flight options available from Billund to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 13, 2025.

This Travelis deal was found by Cheapflights users on 11/13. 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 Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:30 amBLL - ORD
1 stop15h 40mAir France
Tue 12/95:20 pmORD - BLL
1 stop14h 15mAir France
Deal found 11/13$489
This Travelis deal was found by Cheapflights users on 11/13. 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 Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/410:25 amBLL - ORD
2 stops15h 02mMultiple Airlines
Tue 12/95:20 pmORD - BLL
1 stop14h 15mMultiple Airlines
Deal found 11/13$494
This Delta deal was found by Cheapflights users on 11/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/410:25 amBLL - ORD
2 stops15h 02mDelta
Tue 12/92:30 pmORD - BLL
2 stops16h 20mDelta
Deal found 11/13$514
This United Airlines deal was found by Cheapflights users on 11/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/272:00 pmBLL - ORD
2 stops28h 51mUnited Airlines
Wed 12/317:55 pmORD - BLL
2 stops30h 50mUnited Airlines
Deal found 11/13$533
This United Airlines deal was found by Cheapflights users on 11/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/286:30 amBLL - ORD
2 stops18h 49mUnited Airlines
Wed 12/3110:35 pmORD - BLL
1 stop28h 10mUnited Airlines
Deal found 11/13$560
This United Airlines deal was found by Cheapflights users on 11/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/216:30 amBLL - ORD
1 stop13h 40mUnited Airlines
Sun 11/303:20 pmORD - BLL
1 stop11h 40mUnited Airlines
Deal found 11/12$610
This United Airlines deal was found by Cheapflights users on 11/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/232:05 pmBLL - ORD
1 stop13h 00mUnited Airlines
Wed 12/319:05 pmORD - BLL
2 stops29h 40mUnited Airlines
Deal found 11/13$618
This Air Canada deal was found by Cheapflights users on 11/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/216:30 amBLL - ORD
2 stops20h 00mAir Canada
Sun 11/308:15 pmORD - BLL
2 stops30h 25mAir Canada
Deal found 11/13$624
This Delta deal was found by Cheapflights users on 11/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2510:25 amBLL - MDW
2 stops20h 15mDelta
Sun 1/49:29 amMDW - BLL
2 stops17h 11mDelta
Deal found 11/11$742
This Delta deal was found by Cheapflights users on 11/12. 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.
Wed 11/2612:05 pmBLL - MDW
2 stops18h 35mDelta
Sun 1/49:29 amMDW - BLL
2 stops17h 11mDelta
Deal found 11/12$812
This Delta deal was found by Cheapflights users on 11/12. 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.
Fri 12/122:25 pmBLL - MDW
2 stops16h 22mDelta
Wed 12/179:34 amMDW - BLL
2 stops17h 06mDelta
Deal found 11/12$1,148

Cheap flight deals from Billund to Illinois

Keep the following information in mind while searching for Billund to Illinois flight deals. Data was last updated November 13, 2025.

Round-trip from

$451
(Travelis)

Popular in

July

Cheapest in

February

Average price

$567
From Billund to Illinois
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($116 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Billund 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 November 13, 2025.
Use the filters below to find and compare flights from Billund to Illinois that are best for you.

Fly from

Billund

Fly to

Illinois

Route

Depart

Return

Price

BillundChicago

BLL - ORD

BLLORD

Billund

Sat 1/17

1:05 pm-1:50 pm

1 stop31h 45m

Chicago O'Hare Intl

Sat 1/24

5:10 pm-12:30 pm

1 stop12h 20m

$451

BillundChicago

BLL - ORD

BLLORD

Billund

Sat 1/17

2:15 pm-10:06 am

2 stops26h 51m

Chicago O'Hare Intl

Sat 1/24

8:00 am-9:40 am

2 stops18h 40m

$497

BillundChicago

BLL - ORD

BLLORD

Billund

Sat 1/17

6:45 am-8:15 pm

2 stops20h 30m

Chicago O'Hare Intl

Sat 1/24

3:20 pm-9:40 am

1 stop11h 20m

$503

BillundChicago

BLL - MDW

BLLMDW

Billund

Sat 1/17

6:00 am-4:16 pm

2 stops17h 16m

Chicago Midway

Sat 1/24

11:45 am-9:35 am

2 stops14h 50m

$516

BillundChicago

BLL - MDW

BLLMDW

Billund

Sat 1/17

6:00 am-4:16 pm

2 stops17h 16m

Chicago Midway

Sat 1/24

4:30 pm-1:25 pm

2 stops13h 55m

$516

BillundChicago

BLL - ORD

BLLORD

Billund

Thu 5/7

4:15 pm-3:55 pm

1 stop30h 40m

Chicago O'Hare Intl

Mon 5/11

7:05 pm-4:20 pm

1 stop14h 15m

$518

BillundChicago

BLL - ORD

BLLORD

Billund

Thu 5/7

5:55 am-11:00 am

1 stop12h 05m

Chicago O'Hare Intl

Mon 5/11

2:55 pm-2:10 pm

1 stop16h 15m

$528

BillundChicago

BLL - ORD

BLLORD

Billund

Thu 5/7

6:00 am-2:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Mon 5/11

2:10 pm-11:10 am

2 stops14h 00m

$530

BillundChicago

BLL - ORD

BLLORD

Billund

Thu 11/27

10:35 am-7:41 am

2 stops28h 06m

Chicago O'Hare Intl

Tue 1/6

6:16 pm-1:25 pm

2 stops36h 09m

$533

BillundChicago

BLL - ORD

BLLORD

Billund

Thu 11/27

2:00 pm-11:51 am

2 stops28h 51m

Chicago O'Hare Intl

Wed 12/31

7:55 pm-9:45 am

2 stops30h 50m

$533

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/11

Showing 1-10 of 16 results
1
2

Best time to book a flight from Billund to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Billund 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 Billund to Illinois

What is the cheapest month to book a flight from Billund to Illinois?

Currently, January is the cheapest month in which you can book a flight from Billund to Illinois (average of $417). Flying from Billund to Illinois in July is currently the most expensive (average of $638). 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.

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 November 13, 2025.
See what other customers who have flown with Lufthansa from Billund 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.
Lufthansa
6.8
Okay
7,572 reviews

Food

6.3

Overall

6.8

Boarding

7.0

Comfort

6.8

Crew

7.6

Entertainment

6.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Jan 2025

FRA - TPA

I had ordered a gluten-free meal through you I double triple checked that through you got screamed at by one of your representatives. She yelled at me and said that she had ordered the mail, she had chosen my seat, and made sure that all my baggage is were paid for. That was a lie. My experience with discover airlines in and of itself was GOOD but your representative was out of line did not do anything that she screamed at me and told me she did and I literally had to call the airlines myself to get my seat selected to double check on my gluten-free meal which still was not on board and to pay for my bags which I thought that I paid for all of them until I got to the airport and I still had to pay for my check back. So cheap flights I will never use you again.
Lufthansa
6.8
Okay
7,572 reviews
Lufthansa
6.8
Okay
7,572 reviews

Food

6.3

Overall

6.8

Boarding

7.0

Comfort

6.8

Crew

7.6

Entertainment

6.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Jan 2025

FRA - TPA

I had ordered a gluten-free meal through you I double triple checked that through you got screamed at by one of your representatives. She yelled at me and said that she had ordered the mail, she had chosen my seat, and made sure that all my baggage is were paid for. That was a lie. My experience with discover airlines in and of itself was GOOD but your representative was out of line did not do anything that she screamed at me and told me she did and I literally had to call the airlines myself to get my seat selected to double check on my gluten-free meal which still was not on board and to pay for my bags which I thought that I paid for all of them until I got to the airport and I still had to pay for my check back. So cheap flights I will never use you again.

Related info for your journey

Find useful and relevant information for your journey from Billund to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Billund to Illinois?

    Billund (BLL), located 1.7 mi from the city center, is the airport you fly out of when you book flights from Billund to Illinois.

  • How long is the flight from Billund to Illinois?

    For as low as $503, British Airways can have you in Illinois from Billund in 20h 30m. Airlines will cover a distance of 4136 mi. This flight may include one or multiple stops.

  • What are the most popular routes from Billund to Illinois?

    Most travelers choose Billund - Chicago O'Hare Intl, Billund - Chicago Midway or Billund - Lambert-St Louis when deciding on the best route from Billund to Illinois.

  • Can I find deals for flights from Billund to Illinois that include hotel bookings?

    Yes. In addition to deals on Billund to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Billund to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Billund to Illinois.

  • Can I find deals for business class flights from Billund to Illinois?

    Yes. Cheapflights offers flight deals from Billund 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 Billund to Illinois?

    Currently, January is the cheapest month in which you can book a flight from Billund to Illinois (average of $417). Flying from Billund to Illinois in July is currently the most expensive (average of $638). 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.

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Alternative routes for Billund to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Billund to Illinois

Discover the top airline that operate flights from Billund 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 November 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$530Average$768FlexibilityNo cancel feeOn-time76%

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