$480 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 12/4. 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
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Best Illinois Flight Deals from Billund

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
St. Louis
St. Louis2 stops$486
St. Louis
St. Louis2 stops$486

Cheap Flights from Billund to Illinois

 
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

Thu, Dec 4 - Mon, Dec 8
British Airways Logo
8:40 pm - 1:55 pmBLL-ORD
24h 15m1 stop
British Airways Logo
11:45 am - 12:20 pmORD-BLL
17h 35m2 stops
$480British Airways
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Thu, Dec 4 - Mon, Dec 8
British Airways Logo
8:40 pm - 3:25 pmBLL-ORD
25h 45m1 stop
British Airways Logo
11:45 am - 12:20 pmORD-BLL
17h 35m2 stops
$481British Airways
Find Deal
Sat, Aug 23 - Thu, Aug 28
Finnair Logo
7:25 am - 5:25 pmBLL-ORD
17h 00m1 stop
Finnair Logo
10:25 pm - 6:45 amORD-BLL
25h 20m2 stops
$489Finnair
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Sat, Aug 23 - Thu, Aug 28
Finnair Logo
7:25 am - 5:25 pmBLL-ORD
17h 00m1 stop
Finnair Logo
10:25 pm - 6:45 amORD-BLL
25h 20m2 stops
$490Finnair
Find Deal
Thu, Dec 4 - Mon, Dec 8
United Airlines Logo
6:35 am - 4:07 pmBLL-ORD
16h 32m2 stops
United Airlines Logo
12:55 pm - 9:40 amORD-BLL
13h 45m2 stops
$548United Airlines
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Thu, Dec 4 - Mon, Dec 8
United Airlines Logo
2:05 pm - 11:38 pmBLL-ORD
16h 33m2 stops
United Airlines Logo
12:55 pm - 9:40 amORD-BLL
13h 45m2 stops
$558United Airlines
Find Deal
Wed, Sep 17 - Sun, Sep 28
Lufthansa Logo
6:00 am - 2:05 pmBLL-ORD
15h 05m1 stop
Lufthansa Logo
10:30 pm - 10:10 amORD-BLL
28h 40m1 stop
$564Lufthansa
Find Deal
Wed, Sep 17 - Sun, Sep 28
Lufthansa Logo
6:00 am - 2:05 pmBLL-ORD
15h 05m1 stop
Lufthansa Logo
10:30 pm - 10:10 amORD-BLL
28h 40m1 stop
$565Lufthansa
Find Deal
Wed, Sep 17 - Sat, Sep 27
Air France Logo
6:35 pm - 2:10 pmBLL-ORD
26h 35m1 stop
Air France Logo
4:20 pm - 1:30 pmORD-BLL
14h 10m1 stop
$566Air France
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Wed, Sep 17 - Sat, Sep 27
Air France Logo
10:15 am - 2:40 pmBLL-ORD
11h 25m1 stop
Air France Logo
4:20 pm - 10:30 amORD-BLL
11h 10m1 stop
$567Air France
Find Deal
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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 $456 (return) on average. On the other hand, the most expensive months are July and August, when the average cost of round-trip tickets is $796 and $760 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 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.


Good to know

Low seasonFebruary
High seasonDecember
Cheapest flight$480
Best time to beat the crowds with an average 32% drop in price.
Most popular time to fly with an average 3% 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 airlines 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.
7.4
United AirlinesOverall score based on 8849 reviews
7.3Comfort
7.7Boarding
7.0Entertainment
8.1Crew
6.6Food
Airline reviews

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

6.0 GoodAnonymous, Jun 2025MLI - ORD
Read more United Airlines reviews

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

I liked that the flight was nonstop from ORD to CIU for $200 round trip.

The schedule to Moline changed 5 times. The gate changed 6 times. That is a pathetic way to run an airline. No wonder that no one in our company flies on United Express to or from Moline. Changes happen most of the time. I learned my lesson on this trip…never again!

All flight attendants could benefit by taking an international flight on Qantas Airline. Qantas attendants are much more hospitable in every way. Much superior than and attendants on any US airline.

While the staff was pleasant and helpful, the following observations are for your awareness. There was some delay on the tarmac on take off and landing. The paid lunch/food offerings were limited. Entertainment was only available on WiFi at a cost.

The first flight was better in terms of the aircraft.

So far so good but food and entertainment are not available for this flight

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

Overall poor for me I paid extra for seats with leg room and my regional flights exit row seats have less leg room then the others that's money that could have been saved and on my final flight home the flights air was not operating it was unbearably hot in the cabin I will be contacting United and filing a DOT complaint

It was my first time with United Airlines and I would say it was very good experience and best of all the flights were on time. Will definitely fly with United Airlines next time.

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:

Delayed take off but I think they waited for passengers.

I had to fly United where the flight crew was atrocious

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

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