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$529+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
BLL — ORD
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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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 June 12, 2025.

Round-trip from

$674
(Travelis)

Popular in

July

Cheapest in

February

Average price

$685
From Billund to Illinois
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($164 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 June 2025
Search Deals

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 June 12, 2025.

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.
Sun 8/316:00 amBLL - STL
2 stops17h 47mKLM
Fri 9/124:40 pmSTL - BLL
2 stops14h 05mKLM
Deal found 6/12$529
This Ticket 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/316:00 amBLL - STL
1 stop14h 30mLufthansa
Fri 9/123:30 pmSTL - BLL
1 stop11h 40mLufthansa
Deal found 6/12$594
This Travelis 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 Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/52:15 pmBLL - ORD
1 stop31h 25mAir France
Sat 8/233:50 pmORD - BLL
2 stops15h 00mAir France
Deal found 6/11$674
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.
Fri 8/156:00 amBLL - ORD
1 stop15h 10mDelta
Sat 9/61:25 pmORD - BLL
2 stops14h 05mDelta
Deal found 6/12$706
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.
Tue 8/52:15 pmBLL - ORD
1 stop31h 25mKLM
Sat 8/234:20 pmORD - BLL
1 stop23h 40mKLM
Deal found 6/12$715
This Travelis 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 Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1810:15 amBLL - MDW
2 stops15h 21mKLM
Sun 9/281:00 pmMDW - BLL
2 stops13h 35mKLM
Deal found 6/11$749
This Travelis 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 Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/276:00 amBLL - STL
2 stops17h 53mAir France
Tue 7/111:29 amSTL - BLL
2 stops16h 36mAir France
Deal found 6/11$751
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/31:05 pmBLL - ORD
2 stops16h 00mMultiple Airlines
Tue 7/86:00 pmORD - BLL
1 stop11h 25mMultiple Airlines
Deal found 6/12$752
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.
Sat 6/286:00 amBLL - STL
2 stops21h 30mDelta
Wed 7/210:48 amSTL - BLL
2 stops17h 17mDelta
Deal found 6/12$786
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/166:00 amBLL - ORD
2 stops21h 16mAir Canada
Thu 9/410:40 amORD - BLL
2 stops20h 20mAir Canada
Deal found 6/12$811
This Ticket 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/2510:25 amBLL - ORD
1 stop16h 15mLOT
Fri 8/14:55 pmORD - BLL
2 stops57h 50mLOT
Deal found 6/10$824
This British Airways 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/144:15 pmBLL - ORD
2 stops31h 10mBritish Airways
Fri 9/52:55 pmORD - BLL
2 stops17h 40mBritish Airways
Deal found 6/12$930

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 June 12, 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

BillundSt. Louis

BLL - STL

BLLSTL

Billund

Sun 8/31

6:00 am-4:47 pm

2 stops17h 47m

Lambert-St Louis

Fri 9/12

4:40 pm-1:45 pm

2 stops14h 05m

$529

BillundSt. Louis

BLL - STL

BLLSTL

Billund

Sun 8/31

6:00 am-1:30 pm

1 stop14h 30m

Lambert-St Louis

Fri 9/12

3:30 pm-10:10 am

1 stop11h 40m

$594

BillundChicago

BLL - ORD

BLLORD

Billund

Tue 8/5

2:15 pm-2:40 pm

1 stop31h 25m

Chicago O'Hare Intl

Sat 8/23

3:50 pm-1:50 pm

2 stops15h 00m

$674

BillundChicago

BLL - ORD

BLLORD

Billund

Fri 8/15

6:00 am-2:10 pm

1 stop15h 10m

Chicago O'Hare Intl

Sat 9/6

1:25 pm-10:30 am

2 stops14h 05m

$706

BillundChicago

BLL - ORD

BLLORD

Billund

Tue 8/5

2:15 pm-2:40 pm

1 stop31h 25m

Chicago O'Hare Intl

Sat 8/23

4:20 pm-11:00 pm

1 stop23h 40m

$715

BillundChicago

BLL - MDW

BLLMDW

Billund

Thu 9/18

10:15 am-6:36 pm

2 stops15h 21m

Chicago Midway

Sun 9/28

1:00 pm-9:35 am

2 stops13h 35m

$749

BillundSt. Louis

BLL - STL

BLLSTL

Billund

Fri 6/27

6:00 am-4:53 pm

2 stops17h 53m

Lambert-St Louis

Tue 7/1

11:29 am-11:05 am

2 stops16h 36m

$751

BillundChicago

BLL - ORD

BLLORD

Billund

Thu 7/3

1:05 pm-10:05 pm

2 stops16h 00m

Chicago O'Hare Intl

Tue 7/8

6:00 pm-12:25 pm

1 stop11h 25m

$752

BillundSt. Louis

BLL - STL

BLLSTL

Billund

Sat 6/28

6:00 am-8:30 pm

2 stops21h 30m

Lambert-St Louis

Wed 7/2

10:48 am-11:05 am

2 stops17h 17m

$786

BillundChicago

BLL - ORD

BLLORD

Billund

Sat 8/16

6:00 am-8:16 pm

2 stops21h 16m

Chicago O'Hare Intl

Thu 9/4

10:40 am-2:00 pm

2 stops20h 20m

$811

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 17 results
1
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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, August is the cheapest month in which you can book a flight from Billund to Illinois (average of $245). Flying from Billund 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.

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 June 12, 2025.
Get a feel of what it's like to fly with Delta, KLM and LOT from Billund to Illinois by reading reviews from past customers. 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.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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!
Air France
7.5
Good
1,463 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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!
Scandinavian Airlines
7.3
Good
1,387 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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 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.

  • 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, August is the cheapest month in which you can book a flight from Billund to Illinois (average of $245). Flying from Billund 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 Billund to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Billund to Illinois

Discover the top 2 airlines 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$427Average$697FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$559Average$697FlexibilityNo cancel feeOn-time76%

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