$333 Find Cheap Flights from Belgium to Illinois

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 for flights to Illinois
These are the airlines KAYAK users have selected most often from within our search results for flights to Illinois
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Useful Info

What is the cheapest flight to Illinois?

These are the best round-trip prices found by users searching on KAYAK in the last 72 hours.

The cheapest ticket to Illinois from Belgium found in the last 72 hours was to Chicago O'Hare Intl Airport, at $660 round-trip. The most popular route is Brussels Bruxelles-National Airport (BRU) to Chicago O'Hare Intl Airport (ORD) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $660.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Belgium 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 Belgium to Illinois is February, when tickets cost $519 (return) on average. On the other hand, the most expensive months are August and December, when the average cost of round-trip tickets is $930 and $767 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights 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 Belgium to Illinois, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Which is the cheapest airport to fly into in Illinois?

Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Illinois is Chicago O'Hare Intl Airport (ORD), with an average flight price of $788.


Good to know

Low seasonJanuary
High seasonAugust
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly with an average 3% increase in price.

FAQs for booking flights from Belgium to Illinois

  • How does KAYAK find such low prices on flights from Belgium 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 Belgium to Illinois.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Belgium 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 Belgium 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 Belgium 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 Belgium 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 Belgium 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 day to fly to Illinois?

    Based on KAYAK data, the cheapest day to fly to Illinois is Thursday where round-trip tickets can be as cheap as $743. On the other hand, the most expensive day to fly is Monday, where round-trip prices are $830 on average.

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

    The cheapest time of day to fly to Illinois is generally in the evening, when round-trip flights cost $583 on average. Morning departures are around 32% more expensive than evening flights, 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 $800.

Reviews of the top 5 airlines serving from Belgium to Illinois

 
See real verified KAYAK customer reviews for airlines flying to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Belgium to Illinois. 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 Belgium 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 8846 reviews
8.1Crew
7.7Boarding
6.6Food
7.3Comfort
7.0Entertainment
Airline reviews

Overall it was good. I missed my connection but I was put on another flight.

8.0 ExcellentJohanna, Jul 2025IAH - ORD
Read more United Airlines reviews

Overall it was good. I missed my connection but I was put on another flight.

Overall a very poor experience - booked premium economy tickets but due to last minute flight delays , all my itinery went for a toss and had to fly economy class with no access to lounge or any compensation by united airlines to make up for the flight delays . i had expected better experience than that from united.

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.

I never board the flight. My visa was delayed and when I tried calling Kayak, no one answer and I still have not heard from anyone.

All great. Very efficient. Good emails that kept us in the know

Original flight was canceled, booked another one and find out when checking I was on the waiting list. Horrible experience

Actually this is my first time using airline I was in every single thing that happened throughout our journey, the appearance of the plane inside furnished about the seating the flight attendants and many many more I was so excited throughout thank you Brussels Airlines for the great service.

On board service was decent. I like the legroom at UA that seems to be more than in other airlines

It was really good because the employees were very nice and fun to talk to. The entertainment was nice because they had plenty of movies to watch.

Crew was enthusiastic. Meal was surprisingly good. They came to give water very frequently. Negative that the seat reclining didn't work

That was a short flight by the only time I could actually sleep

How can a national carrier and part of Lufthansa group not even provide complimentary water and a snack in such a long flight ?

The flight went well, only during the flight from Brussels to Vilnius I would have liked if they had at least given us plain water to drink.

Dublin to Boston was decent. Food and entertainment was included and that was expected for the rate paid.

The Nice airport was a horrible boarding experience. I have never experienced the kind of compressed mob (in the B12-B17 gate area) of people all unclear what was happening and no airport staff to assist. There was no signage and 1000’s of people waiting for any info for 2 hours.

Flight was on time. Boarding was quick and efficient. Seats were comfortable. Food was fine.

Weeeeeeell, you folks know economy class on Airbuses well--you're packed in like sardines. We may actually spring for more expensive seats next time, with a little room to stretch out. NO room to stretch out in Airbus economy class! :-) Apart from this, the food was decent (considering that it's mass-produced, and has severe spatial restrictions of its own), the staff were friendly enough, and there was a wide selection of movies, etc. to watch. Overall, I'd tend to use the word "adequate" rather than "exceptional" for my experience. But really, how could it be otherwise?

I like Aer Lingus so that is why I’m writing this critique so they can become better. The boarding gate was too small to board properly. Our seats were toward the back of the plane knowing we would be boarding after business class, we moved to that area after business class boarded. An Aer Lingus employee told us we couldn’t stand there. We explained we were the next group to board and wouldn’t even be able to hear when our boarding was called. She didn’t care and was not very professional. The cabin was freezing. I wouldn’t feed my dog the food. We were over an hour late coming into chicago because of weather which can’t be avoided. I asked the crew if they could make an annoucement for before whose final destination is chicago to wait and allow the people with connecting to deplane first. He said there are a lot of people with connecting flights. He said, it doesn’t matter. Well, yes it does. He could have been more considerate of his passengers.

The flight was delayed by about an hour, but the staff and signs at the airport never actually said it was delayed. At the expected boarding time, we were told we would be boarding in about 10 minutes, then 20 minutes passed, and were told again that we would board in about 10 minutes. That happened multiple times, such that "10 minutes" turned into an hour.

The seat spacing was good. The food, not so good... typical airline food. 😕

I would face like to have more selections for entertainments overall it was very good. .

It was fine. We were delayed leaving but a situation of too many planes, not the airlines fault.

One cold drinks service. No snacks with drinks. No tomato juice or apple juice, coke - only fanta or sprite then ran out of that. Went to gally after meal service no one there / no self service for water at least. Waited 25 min for cabin crew to assist. No recycling of cardboard/ plastic - all put to garbage. Breakfast was a nutrigrain bar and an orange juice. Also I'm sure I booked a flight with checked luggage allowance but had to buy extra when I had my booking confirmation. Movies were good. Chairs comfy. Pillow and blanket and ac vents.

Still one of my favorite airlines, but the entertainment options were a bit lacking. It didn't help that my screen didn't work on one of the legs of the trip.

The plane was very small and the aisle was so narrow that every time someone walked by they rubbed against me, so it was very uncomfortable.

Everything was good. Only issue comes from being vegan and flying. The food options are super limited.

Overall good for an economy fare. IMO the movie selection could be improved. Great that you can now connect bluetooth headphones to the entertainment system.

Paid for a Premium seat...minimal recline, no footrest. Maybe slightly wider than a cheap economy seat. Zero chance of getting any rest on this plane

Comfort of seats is not good. Like sitting on a rock for 6 hours. Also no in flight food and limited beverages unless you pay is not nice. Need flight to be dark during the “night” but attendants don’t ask for shades to be lowered..

Seats in premier saga class were narrow and hard. Very uncomfortable for a 5-hour flight.

Iceland airlines doesn't provide any meal on flight to and from New York, except water and soda. Airline over charge for checking in luggage. I'm really upset.

I had an exit row and so was Comfortable on the long flight.

The seats on this airline are sooo small, even for a petite person. I felt like the seat tilted forward and I was fighting to stay in it. The lavatory is horribly small, with a wet floor because the sink is so small you can't help but splash the water all over when washing up.

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

Book cheap flights from Belgium to Illinois

Recent round-trip flight deals

 
These are the cheapest round-trip flights to Illinois found on KAYAK in the last 72 hours.
8/11Mon
1 stopBritish Airways
13h 20mBRU-ORD
8/24Sun
1 stopBritish Airways
19h 45mORD-BRU
$477
8/11Mon
1 stopBritish Airways
13h 20mBRU-ORD
8/24Sun
1 stopBritish Airways
16h 50mORD-BRU
$481
11/5Wed
1 stopAer Lingus
14h 40mBRU-ORD
11/12Wed
1 stopAer Lingus
10h 40mORD-BRU
$488
10/2Thu
1 stopAer Lingus
15h 40mBRU-ORD
12/3Wed
1 stopAer Lingus
10h 40mORD-BRU
$491
10/4Sat
1 stopIcelandair
11h 25mBRU-ORD
10/9Thu
1 stopIcelandair
10h 25mORD-BRU
$510
10/1Wed
1 stopIcelandair
11h 25mBRU-ORD
10/9Thu
1 stopIcelandair
10h 25mORD-BRU
$545
12/4Thu
2 stopsLufthansa
17h 14mBRU-STL
12/8Mon
1 stopLufthansa
12h 41mSTL-BRU
$643
12/4Thu
2 stopsLufthansa
16h 20mBRU-STL
12/8Mon
1 stopLufthansa
12h 41mSTL-BRU
$644
8/1Fri
1 stopUnited Airlines
28h 59mBRU-STL
8/22Fri
1 stopUnited Airlines
19h 25mSTL-BRU
$674
7/29Tue
1 stopUnited Airlines
19h 30mBRU-STL
8/3Sun
2 stopsUnited Airlines
20h 00mSTL-BRU
$768

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Recent one-way flight deals

 
Only flying one-way? Below are some of the best deals for one-way flights to Illinois found on KAYAK in the last 72 hours.
10/15Wed
2 stops
39h 12mCRL-ORD
$333
10/22Wed
3 stops
49h 03mBRU-ORD
$342
8/26Tue
3 stops
31h 02mBRU-ORD
$351
12/31Wed
2 stopsAer Lingus
28h 10mBRU-ORD
$606
8/10Sun
2 stopsAer Lingus
28h 10mBRU-ORD
$609
9/15Mon
nonstopBrussels Airlines
8h 50mBRU-ORD
$619
10/4Sat
nonstopBrussels Airlines
8h 50mBRU-ORD
$642
12/31Wed
nonstopLufthansa
9h 00mBRU-ORD
$681
1/6Tue
nonstopLufthansa
9h 00mBRU-ORD
$694
7/22Tue
2 stopsBritish Airways
16h 24mBRU-STL
$732

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Last minute flights to Illinois

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights to Illinois that are departing in the next 10 days.
7/15Tue
multi-stopITA Airways
25h 15mBRU-ORD
8/13Wed
multi-stopITA Airways
20h 00mORD-BRU
$551
7/15Tue
multi-stopBritish Airways
29h 18mBRU-ORD
7/25Fri
multi-stopBritish Airways
30h 35mORD-BRU
$554
7/15Tue
multi-stopDelta
17h 40mBRU-MDW
7/25Fri
multi-stopDelta
13h 41mMDW-BRU
$924
7/15Tue
nonstopUnited Airlines
8h 40mBRU-ORD
7/25Fri
multi-stopUnited Airlines
14h 20mORD-BRU
$976
7/13Sun
multi-stopDelta
15h 00mBRU-ORD
8/8Fri
multi-stopDelta
12h 34mORD-BRU
$1,001
7/15Tue
multi-stopUnited Airlines
17h 14mBRU-ORD
8/13Wed
nonstopUnited Airlines
8h 05mORD-BRU
$1,066
7/14Mon
multi-stopLufthansa
14h 55mBRU-ORD
7/25Fri
nonstopLufthansa
8h 05mORD-BRU
$1,072
7/13Sun
multi-stopLufthansa
13h 25mBRU-ORD
8/8Fri
nonstopLufthansa
8h 00mORD-BRU
$1,076
7/12Sat
nonstopBrussels Airlines
8h 40mBRU-ORD
8/9Sat
multi-stopBrussels Airlines
12h 10mORD-BRU
$1,257
7/15Tue
nonstopBrussels Airlines
8h 40mBRU-ORD
7/25Fri
nonstopBrussels Airlines
8h 05mORD-BRU
$3,053

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Everything you need to know for your flight to Illinois

Cabin class types available on flights to Illinois

Cabin classes available on flights to Illinois. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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