BLL - ORD

$477 Find Cheap Flights from Billund to Chicago

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 Chicago departing on 3/18. 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 Chicago O'Hare Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Billund to Chicago, 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 Chicago, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$477
Overall average: $588
British Airways
Wed 3/18Wed 4/8
BLL - ORD • 1 stop
Cheapest one-way
Multiple Airlines
Wed 11/19
BLL - ORD • multi-stop
Top airlines
British Airways
Cheapest • from $477 (round-trip)
Lufthansa
Best reviews • 6.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 17% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 31% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Chicago!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Billund to Chicago (BLL-ORD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Billund to Chicago 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 Chicago

Wed, Mar 18 - Wed, Apr 8
British Airways Logo
1:20 pm - 7:45 pmBLL-ORD
12h 25m1 stop
British Airways Logo
5:00 pm - 12:05 pmORD-BLL
12h 05m1 stop
$477British Airways
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Thu, Dec 4 - Mon, Dec 8
Air France Logo
6:30 am - 3:10 pmBLL-ORD
15h 40m1 stop
Air France Logo
4:25 pm - 11:20 amORD-BLL
11h 55m1 stop
$501Air France
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Thu, Dec 4 - Mon, Dec 8
Multiple Airlines Logo
2:30 pm - 12:01 amBLL-ORD
16h 31m2 stops
Multiple Airlines Logo
1:23 pm - 9:40 amORD-BLL
13h 17m2 stops
$505Multiple Airlines
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Mon, Mar 23 - Thu, Apr 9
British Airways Logo
1:10 pm - 7:45 pmBLL-ORD
12h 35m1 stop
British Airways Logo
7:05 pm - 1:55 pmORD-BLL
11h 50m1 stop
$519British Airways
Find Deal
Thu, May 7 - Mon, May 11
British Airways Logo
4:15 pm - 6:15 pmBLL-ORD
33h 00m1 stop
British Airways Logo
5:00 pm - 4:20 pmORD-BLL
16h 20m1 stop
$520British Airways
Find Deal
Thu, Dec 4 - Mon, Dec 8
United Airlines Logo
6:30 am - 3:20 pmBLL-ORD
15h 50m1 stop
United Airlines Logo
1:05 pm - 9:40 amORD-BLL
13h 35m2 stops
$528United Airlines
Find Deal
Thu, Dec 4 - Tue, Dec 9
United Airlines Logo
2:00 pm - 11:43 pmBLL-ORD
16h 43m2 stops
United Airlines Logo
1:05 pm - 9:45 amORD-BLL
13h 40m2 stops
$533United Airlines
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Wed, Mar 25 - Sat, Apr 11
Delta Logo
6:00 am - 5:37 pmBLL-ORD
17h 37m2 stops
Delta Logo
5:45 pm - 4:25 pmORD-BLL
15h 40m2 stops
$535Delta
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Thu, May 7 - Mon, May 11
Delta Logo
10:15 am - 6:41 pmBLL-ORD
15h 26m2 stops
Delta Logo
4:20 pm - 9:35 amORD-BLL
10h 15m1 stop
$537Delta
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Thu, Mar 19 - Sat, Apr 11
British Airways Logo
1:00 pm - 7:45 pmBLL-ORD
12h 45m1 stop
British Airways Logo
7:05 pm - 2:45 pmORD-BLL
12h 40m1 stop
$560British Airways
Find Deal
Booking Insights

KAYAK's insights & trends for Billund to Chicago flights

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

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

The average price of all round-trip flights from Billund to Chicago O'Hare Intl Airport clicked on KAYAK for each day over the last 12 months.

When flying from Billund to Chicago, you should consider leaving on a Saturday and avoid Wednesdays if you are looking for the best rates. For your return to Billund, you’ll find the best rates on Tuesdays and the most expensive ones on Mondays.

What is the cheapest month to fly from Billund to Chicago O'Hare Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Billund to Chicago O'Hare Intl Airport, 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 Chicago O'Hare Intl Airport is January, where tickets cost $462 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $856 and $802 respectively.

How far in advance should I book a flight from Billund to Chicago O'Hare Intl Airport?

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 Chicago O'Hare Intl Airport, 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 Chicago O'Hare Intl Airport, you should book around 4 weeks before departure, which saves you about 17% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

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Good to know

Low seasonMarch
Cheapest flight$477
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly and prices are also 4% lower on average.
Flight from Billund to Chicago

When to book flights from Billund to Chicago

Are your dates flexible? Find out the best times to travel from Billund to Chicago based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Billund to Chicago flights

  • What is the cheapest flight from Billund to Chicago O'Hare Intl Airport?

    In the last 3 days, the lowest price for a flight from Billund to Chicago O'Hare Intl Airport was $477 for a round-trip ticket.

  • Do I need a passport to fly between Billund and Chicago?

    Yes, you’ll need a passport to travel to Chicago from Billund.

  • Which aircraft models fly most regularly from Billund to Chicago?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Billund to Chicago?

    Star Alliance is the only airline alliance operating flights between Billund and Chicago.

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

    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 Chicago.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago from Billund 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 Chicago?

    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 to Chicago with an airline and back to Billund with another airline. Booking your flights between Billund and ORD can sometimes prove cheaper using this method.

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

    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 to Chicago from Billund 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 Chicago

 
See real verified KAYAK customer reviews for airlines flying from Billund to Chicago. 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 Chicago? 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 7576 reviews
6.8Comfort
7.6Crew
6.4Entertainment
6.3Food
7.0Boarding
Airline reviews

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

10.0 ExcellentAnonymous, Oct 2025FRA - ORD
Read more Lufthansa reviews

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.

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.

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

Information on your arrival and departure airports

Billund (BLL)
O'Hare Intl (ORD)