$493 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 2/23. 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, 0 bags

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
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Flight Deals

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

Mon, Feb 23 - Sun, Mar 1
British Airways Logo
1:10 pm - 6:45 pm
BLL
-
ORD
12h 35m
1 stop
British Airways Logo
5:10 pm - 11:10 am
ORD
-
BLL
11h 00m
1 stop
$493British Airways
Mon, Feb 23 - Sun, Mar 1
British Airways Logo
8:45 pm - 1:50 pm
BLL
-
ORD
24h 05m
1 stop
British Airways Logo
5:10 pm - 11:10 am
ORD
-
BLL
11h 00m
1 stop
$494British Airways
Mon, Feb 23 - Sun, Mar 1
British Airways Logo
8:45 pm - 6:00 pm
BLL
-
ORD
28h 15m
2 stops
British Airways Logo
5:10 pm - 11:10 am
ORD
-
BLL
11h 00m
1 stop
$499British Airways
Tue, Mar 24 - Sat, Apr 11
Multiple Airlines Logo
12:05 pm - 3:20 pm
BLL
-
ORD
33h 15m
1 stop
Multiple Airlines Logo
5:10 pm - 11:20 am
ORD
-
BLL
11h 10m
1 stop
$550Multiple Airlines
Sat, Feb 28 - Wed, Mar 4
United Airlines Logo
6:45 am - 8:23 pm
BLL
-
STL
20h 38m
2 stops
United Airlines Logo
9:55 am - 1:25 pm
STL
-
BLL
20h 30m
2 stops
$562United Airlines
Sat, Feb 28 - Wed, Mar 4
United Airlines Logo
6:45 am - 7:14 pm
BLL
-
STL
19h 29m
2 stops
United Airlines Logo
11:25 am - 10:00 am
STL
-
BLL
15h 35m
2 stops
$565United Airlines
Sat, Feb 7 - Wed, Feb 11
Lufthansa Logo
2:15 pm - 5:43 pm
BLL
-
STL
34h 28m
2 stops
Lufthansa Logo
6:40 pm - 9:45 am
STL
-
BLL
32h 05m
2 stops
$590Lufthansa
Tue, Mar 24 - Sat, Apr 11
Delta Logo
6:00 am - 5:54 pm
BLL
-
MDW
17h 54m
2 stops
Delta Logo
6:34 pm - 4:25 pm
MDW
-
BLL
14h 51m
2 stops
$656Delta
Tue, Mar 24 - Sat, Apr 11
Delta Logo
6:00 am - 10:31 pm
BLL
-
MDW
22h 31m
2 stops
Delta Logo
1:10 pm - 1:40 pm
MDW
-
BLL
17h 30m
2 stops
$664Delta
Sat, Feb 7 - Wed, Feb 11
Multiple Airlines Logo
2:15 pm - 5:11 am
BLL
-
STL
21h 56m
2 stops
Multiple Airlines Logo
12:44 pm - 10:00 am
STL
-
BLL
14h 16m
2 stops
$691Multiple Airlines
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.

How much is a round-trip flight from Billund to Illinois?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Billund to Illinois departing in February.

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 December, when tickets cost $530 (return) on average. On the other hand, the most expensive months are July and June, when the average cost of round-trip tickets is $819 and $755 respectively.

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 5 weeks before departure, which saves you about 45% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Find deals

Good to know

Low seasonJanuary
Cheapest flight$493
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly with an average 43% 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.

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 7738 reviews
6.8Comfort
6.3Food
7.0Boarding
6.4Entertainment
7.6Crew
Airline reviews

We were in premium economy seats that appeared to be locked in plae, No reclining. My aching back.

8.0 ExcellentAnonymous, Jan 2026
MUC - ORD
Read more Lufthansa reviews

We were in premium economy seats that appeared to be locked in plae, No reclining. My aching back.

I don’t understand how they charge as much as they do for such a poor experience

I wish the plane had pod seating for business class. I had a window seat (8K) and I had to climb over the person sitting on the aisle when I needed to get up. Also there is no partition between the seats for privacy when sleeping. The Asian airlines have much nicer business class seating. Their seats are wider for better comfort when sleeping.

The seat space seemed small especially when the person ahead reclined but other than that, very good.

Luggage transfer in Chicago was not performed in time. I received my luggage at my destination two days later.

Food was poor quality and the screens for entertainment didn’t work properly

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.

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

Information on your arrival and departure airports

Billund (BLL)