$496 Find Cheap Flights from Billund to Illinois

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Billund to Illinois departing on 11/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Billund to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Billund to Illinois, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Billund to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
St. Louis
St. Louis2 stops$509
St. Louis
St. Louis2 stops$509

Book Cheap Billund to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Billund to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Billund to Illinois

Sat, Nov 8 - Wed, Nov 12
British Airways Logo
1:05 pm - 6:45 pmBLL-ORD
12h 40m1 stop
British Airways Logo
6:30 pm - 7:50 pmORD-BLL
18h 20m1 stop
$496British Airways
Find Deal
Sat, Nov 8 - Wed, Nov 12
British Airways Logo
1:05 pm - 6:45 pmBLL-ORD
12h 40m1 stop
British Airways Logo
1:45 pm - 12:10 pmORD-BLL
15h 25m2 stops
$498British Airways
Find Deal
Sun, Nov 16 - Thu, Nov 20
Lufthansa Logo
6:30 am - 8:05 pmBLL-ORD
20h 35m1 stop
Lufthansa Logo
3:20 pm - 1:20 pmORD-BLL
15h 00m1 stop
$517Lufthansa
Find Deal
Sat, Nov 8 - Wed, Nov 12
Air France Logo
10:25 am - 6:25 pmBLL-MDW
15h 00m2 stops
Air France Logo
1:47 pm - 11:20 amMDW-BLL
14h 33m2 stops
$528Air France
Find Deal
Sat, Nov 8 - Wed, Nov 12
KLM Logo
10:25 am - 6:25 pmBLL-MDW
15h 00m2 stops
KLM Logo
1:14 pm - 9:40 amMDW-BLL
13h 26m2 stops
$529KLM
Find Deal
Sat, Nov 8 - Wed, Nov 12
Multiple Airlines Logo
6:45 am - 2:55 pmBLL-ORD
15h 10m2 stops
Multiple Airlines Logo
12:50 pm - 10:00 amORD-BLL
14h 10m2 stops
$537Multiple Airlines
Find Deal
Sun, Nov 16 - Thu, Nov 20
Multiple Airlines Logo
6:30 am - 2:55 pmBLL-ORD
15h 25m2 stops
Multiple Airlines Logo
6:25 pm - 1:20 pmORD-BLL
11h 55m1 stop
$547Multiple Airlines
Find Deal
Fri, Oct 10 - Mon, Oct 20
Lufthansa Logo
10:45 am - 11:57 pmBLL-STL
20h 12m2 stops
Lufthansa Logo
5:28 pm - 12:25 pmSTL-BLL
35h 57m2 stops
$659Lufthansa
Find Deal
Thu, Oct 2 - Mon, Oct 6
KLM Logo
2:15 pm - 2:10 pmBLL-ORD
30h 55m1 stop
KLM Logo
5:40 pm - 1:30 pmORD-BLL
12h 50m2 stops
$701KLM
Find Deal
Thu, Oct 2 - Tue, Oct 7
Air France Logo
2:15 pm - 2:10 pmBLL-ORD
30h 55m1 stop
Air France Logo
4:15 pm - 5:40 pmORD-BLL
18h 25m1 stop
$722Air France
Find Deal
Booking Insights

KAYAK's insights & trends for Billund to Illinois flights

Get data-powered insights and trends into flights from Billund to Illinois to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Billund to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Billund to Illinois, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Billund to Illinois is February, when tickets cost $464 (return) on average. On the other hand, the most expensive months are July and June, when the average cost of round-trip tickets is $810 and $688 respectively.

What’s the cheapest day of the week to fly from Billund to Illinois?

The average price of all round-trip flights from Billund to Illinois clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Illinois on a Saturday and more expensive on a Wednesday. On your return trip to Billund, you should consider flying back on a Tuesday, and avoid Mondays for better deals.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Billund to Illinois, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Billund to Illinois, you should book around 4 weeks before departure, which saves you about 13% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$496
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly with an average 5% increase in price.
Flight from Billund to Chicago

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Billund to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Billund to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Billund to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Billund to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Billund to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Billund to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Billund to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Billund to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Illinois?

    The cheapest time of day to fly to Illinois is generally in the morning, when round-trip flights cost $564 on average. The most expensive time of day to fly to Illinois is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $595.

Reviews of the top airline flying from Billund to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Billund to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Billund to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
6.8
LufthansaOverall score based on 7407 reviews
6.4Entertainment
7.0Boarding
6.8Comfort
7.6Crew
6.3Food
Airline reviews

It was a short flight, everything was good with it.

8.0 ExcellentAnonymous, Aug 2025CMH - ORD
Read more Lufthansa reviews

It was a short flight, everything was good with it.

I darted through the Frankfurt airport to make my connecting flight. I asked if it was a possibility to upgrade and the agent did. This was the kindest gesture and it made up for the previous delayed flight and distress/anxiety of anticipating that Zi was going to miss my Frankfurt-Chicago connection. I cannot express my gratitude for the upgrade.. I am 5feet 10 inches do the leg space was amazing.

I meant this flight was not good, the one from Tirana to Frankfurt was better!

I was very grateful for Lufthansa's role in organizing mobility support. The touchscreen on my seat was faulty: slow, stained (I couldn't get it clean), and glitchy. This made selecting movies extremely time consuming, and twice I had to start all over from the beginning.

The crew was the best I’ve ever encountered. Business class was spacious, immaculate, and very modern.

I wish seats were not reclinable. It's so claustrophobic when the person in front of you spends most of a nine hour flight leaned all the way back. The crew was really nice though and the dinner (red Thai curry) was pretty compelling.

Our flights were severely delayed, then canceled and we had to fly out next day with no sleep accommodation help. This led to our baggage being lost and the service reps after baggage couldn’t be bothered to help. They kept sending us to different counters when we were at the right counter to begin with. The only saving grace was the angel woman supervisor with blond hair who helped us put in a missing baggage claim.

The boarding system was all bogus - employees at the boarding gate were not sound like proffesional or may be possibly rational

I got an email in the morning of the flight 1/7, from Kayak, that I was rebooked from UA 906 to LH 430. Nobody at Lufthansa ot United knew about this. I went to both counters. at the airport. Also, Cheap Flights, who I booked the ticket through, did not know. I ended up staying on the United flight. But this was very disturbing, since I got a very late notice that I was rebooked to an earlier flight, I hurried to the airport to find out after a lot of inquiring that this was a mistake. Not a good Kayak experience.

After living in Europe for five years and flying with Lufthansa and KLM airlines, I’ve realized that United Airlines is now a budget carrier. The flight attendant are not friendly. The seats are not comfortable. And everything comes at a cost. I will be flying with KLM and Skyteam like Delta to the US going forward no doubt. United Airlines is not what it once was:

Everything you need to know for your flight from Billund to Illinois

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.