When did momondo last update prices for flights from Billund Airport to Illinois?

Prices for flights from Billund Airport to Illinois were last updated today.

How many operators does momondo search for flights from Billund Airport to Illinois?

As of December 2025, there is 1 operator available to choose from for flights from Billund Airport to Illinois.

How old do you have to be to fly from Billund Airport to Illinois?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Billund Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$468 Cheap Flights from Billund to Illinois in 2025/26

1 adult

0 bags

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Find the cheapest flights from Billund to Illinois

Round-trip

Cheap round-trip flights

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1:00 pm - 6:14 pm

BLL

STL

36h 14m2 stops

12:11 pm - 12:20 pm

STL

BLL

17h 09m2 stops

$509British Airways

Thu, Jan 22 - Mon, Jan 26

1:05 pm - 6:45 pm

BLL

ORD

12h 40m1 stop

11:40 am - 12:10 pm

ORD

BLL

41h 30m2 stops

$542British Airways

Sat, Feb 14 - Tue, Feb 17

1:05 pm - 6:45 pm

BLL

ORD

12h 40m1 stop

11:40 am - 12:10 pm

ORD

BLL

41h 30m2 stops

$544British Airways

Sat, Feb 14 - Tue, Feb 17

6:00 am - 4:29 pm

BLL

MDW

17h 29m2 stops

12:48 pm - 9:40 am

MDW

BLL

13h 52m2 stops

$556Delta

Fri, Jan 16 - Tue, Jan 20

2:15 pm - 11:43 pm

BLL

ORD

16h 28m2 stops

7:30 am - 9:45 am

ORD

BLL

19h 15m2 stops

$564United Airlines

Sat, Feb 14 - Tue, Feb 17

10:35 am - 11:43 pm

BLL

ORD

20h 08m2 stops

1:02 pm - 1:40 pm

ORD

BLL

17h 38m2 stops

$565United Airlines

Sat, Feb 14 - Tue, Feb 17

1:05 pm - 6:45 pm

BLL

ORD

12h 40m1 stop

9:45 pm - 12:10 pm

ORD

BLL

31h 25m1 stop

$668British Airways

Sat, Feb 14 - Tue, Feb 17

United Airlines flights from Billund to Illinois

Our best United Airlines deals on Billund to Illinois flight tickets

United Airlines

Feb 14

BLL2:15 pmBillund

16h 28m

2 stops

ORD11:43 pmChicago O'Hare Intl

Feb 17

ORD1:02 pmChicago O'Hare Intl

17h 38m

2 stops

BLL1:40 pmBillund

$564

Find similar

United Airlines

Feb 14

BLL10:35 amBillund

20h 08m

2 stops

ORD11:43 pmChicago O'Hare Intl

Feb 17

ORD1:02 pmChicago O'Hare Intl

17h 38m

2 stops

BLL1:40 pmBillund

$565

Find similar

British Airways flights from Billund to Illinois

Our best British Airways deals on Billund to Illinois flight tickets

British Airways

Jan 22

BLL1:00 pmBillund

36h 14m

2 stops

STL6:14 pmLambert-St Louis

Jan 26

STL12:11 pmLambert-St Louis

17h 09m

2 stops

BLL12:20 pmBillund

$509

Find similar

British Airways

Jan 22

BLL1:00 pmBillund

55h 09m

2 stops

STL1:09 pmLambert-St Louis

Jan 26

STL1:35 pmLambert-St Louis

15h 45m

2 stops

BLL12:20 pmBillund

$511

Find similar

British Airways

Feb 14

BLL1:05 pmBillund

12h 40m

1 stop

ORD6:45 pmChicago O'Hare Intl

Feb 17

ORD11:40 amChicago O'Hare Intl

41h 30m

2 stops

BLL12:10 pmBillund

$542

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BillundSt. Louis

BLL - STL

BLLSTL

Billund

Thu 1/22

1:00 pm-6:14 pm

2 stops36h 14m

Lambert-St Louis

Mon 1/26

12:11 pm-12:20 pm

2 stops17h 09m

$509

BillundChicago

BLL - ORD

BLLORD

Billund

Sat 2/14

1:05 pm-6:45 pm

1 stop12h 40m

Chicago O'Hare Intl

Tue 2/17

11:40 am-12:10 pm

2 stops41h 30m

$542

BillundChicago

BLL - ORD

BLLORD

Billund

Sat 2/14

1:05 pm-6:45 pm

1 stop12h 40m

Chicago O'Hare Intl

Tue 2/17

11:40 am-12:10 pm

2 stops41h 30m

$544

BillundChicago

BLL - MDW

BLLMDW

Billund

Fri 1/16

6:00 am-4:29 pm

2 stops17h 29m

Chicago Midway

Tue 1/20

12:48 pm-9:40 am

2 stops13h 52m

$556

BillundChicago

BLL - ORD

BLLORD

Billund

Sat 2/14

2:15 pm-11:43 pm

2 stops16h 28m

Chicago O'Hare Intl

Tue 2/17

7:30 am-9:45 am

2 stops19h 15m

$564

BillundChicago

BLL - ORD

BLLORD

Billund

Sat 2/14

10:35 am-11:43 pm

2 stops20h 08m

Chicago O'Hare Intl

Tue 2/17

1:02 pm-1:40 pm

2 stops17h 38m

$565

BillundChicago

BLL - ORD

BLLORD

Billund

Sat 2/14

1:05 pm-6:45 pm

1 stop12h 40m

Chicago O'Hare Intl

Tue 2/17

9:45 pm-12:10 pm

1 stop31h 25m

$668

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Billund to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Billund is in February. Flight prices, which tend to average around $535, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of February, then flying in December is also cheap. Prices for this month can be found on momondo for an average of $536.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Billund to Illinois is on a Tuesday when prices can be found for as low as $408. Flights from Billund to Illinois on a Saturday will generally be more expensive and average around $850. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the morning. Flights from Billund to Illinois during this time can be as low as $564. Flights at noon are often more expensive with an average ticket price of $595.

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Billund when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $664 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Billund for as low as $444 on momondo.

Cheap Billund to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Billund to Illinois

Fastest flight time	12h 40m
Direct flights	None

The fastest flight from Billund to Illinois takes 12h 40m

There are no direct flights from Billund to Illinois. There are no popular flight routes from Billund to Illinois.

Search flight deals

When did momondo last update prices for flights from Billund Airport to Illinois?
Prices for flights from Billund Airport to Illinois were last updated today.
How many operators does momondo search for flights from Billund Airport to Illinois?
As of December 2025, there is 1 operator available to choose from for flights from Billund Airport to Illinois.
How old do you have to be to fly from Billund Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Billund Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Billund to Illinois

Compare and see reviews for airlines that fly from Billund to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Lufthansa	PriceFrom $530	Free Cancellation	Rating 6.8 7,649 reviews		Search Lufthansa flights

Why use momondo?

Why should I use momondo to find a flight deal from Billund to Illinois?

Finding the right flight to Illinois from Billund is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.

Can I find flights from Billund to Illinois with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Illinois from Billund with this policy.

How can momondo help me find flights from Billund to Illinois?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Billund.

I’m not ready to book a flight from Billund to Illinois right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Illinois from Billund. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.