$309 Find Cheap Flights from Brussels to Illinois

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Brussels to Illinois departing on 10/9. 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 Brussels to Illinois.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Brussels to Illinois.
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Best Illinois Flight Deals from Brussels

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Chicago
Chicago1 stop$480
Chicago
Chicago1 stop$480

Cheap Flights from Brussels to Illinois

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

Mon, Aug 11 - Mon, Aug 18
British Airways Logo
9:15 pm - 5:00 pmBRU-ORD
26h 45m1 stop
British Airways Logo
10:35 pm - 9:55 amORD-BRU
28h 20m1 stop
$480British Airways
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Thu, Sep 11 - Thu, Sep 25
TAP AIR PORTUGAL Logo
8:55 pm - 4:10 pmBRU-ORD
26h 15m1 stop
TAP AIR PORTUGAL Logo
6:00 pm - 11:55 pmORD-BRU
22h 55m1 stop
$482TAP AIR PORTUGAL
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Thu, Nov 6 - Thu, Nov 13
Aer Lingus Logo
10:15 am - 5:55 pmBRU-ORD
14h 40m1 stop
Aer Lingus Logo
7:40 pm - 8:10 pmORD-BRU
17h 30m1 stop
$488Aer Lingus
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Thu, Oct 2 - Wed, Dec 3
Aer Lingus Logo
10:20 am - 7:00 pmBRU-ORD
15h 40m1 stop
Aer Lingus Logo
3:55 pm - 9:35 amORD-BRU
10h 40m1 stop
$490Aer Lingus
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Wed, Aug 27 - Wed, Sep 3
Icelandair Logo
1:50 pm - 6:15 pmBRU-ORD
11h 25m1 stop
Icelandair Logo
10:15 pm - 12:50 pmORD-BRU
31h 35m1 stop
$516Icelandair
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Tue, Aug 26 - Tue, Sep 2
Icelandair Logo
1:50 pm - 9:15 pmBRU-ORD
14h 25m1 stop
Icelandair Logo
10:15 pm - 12:50 pmORD-BRU
31h 35m1 stop
$528Icelandair
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Mon, Aug 25 - Wed, Sep 3
United Airlines Logo
10:00 am - 8:00 pmBRU-STL
17h 00m1 stop
United Airlines Logo
9:17 am - 8:05 amSTL-BRU
15h 48m2 stops
$631United Airlines
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Mon, Aug 11 - Mon, Aug 18
United Airlines Logo
10:10 am - 8:00 pmBRU-STL
16h 50m1 stop
United Airlines Logo
1:30 pm - 8:00 amSTL-BRU
11h 30m1 stop
$633United Airlines
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Thu, Dec 4 - Mon, Dec 8
Lufthansa Logo
7:00 am - 5:03 pmBRU-STL
17h 03m2 stops
Lufthansa Logo
11:50 am - 8:05 amSTL-BRU
13h 15m1 stop
$641Lufthansa
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Mon, Aug 11 - Fri, Aug 22
Lufthansa Logo
10:15 am - 3:47 pmBRU-STL
12h 32m1 stop
Lufthansa Logo
12:35 pm - 4:15 pmSTL-BRU
20h 40m2 stops
$653Lufthansa
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Useful Info

KAYAK's insights & trends for Brussels to Illinois flights

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

What is the cheapest Brussels to Illinois flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from Brussels to Illinois.

The cheapest ticket to Illinois from Brussels found in the last 72 hours was to Chicago, at $612 round-trip. The most popular route is from 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 $612.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Brussels 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 Brussels to Illinois is February, when tickets cost $526 (return) on average. On the other hand, the most expensive months are August and July, when the average cost of round-trip tickets is $744 and $716 respectively.

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

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

If you are looking for a flight deal from Brussels to Illinois, look for departures on Thursdays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from Illinois, Monday is the cheapest day to fly and Saturday is the most expensive.

How far in advance should I book a flight from Brussels 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 Brussels 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 Brussels 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.


FAQs - booking Illinois flights

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

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Brussels 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 Brussels 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 Brussels 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 Brussels 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 Brussels 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 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 Brussels to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Brussels 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 Brussels 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 8858 reviews
8.1Crew
7.7Boarding
7.0Entertainment
7.3Comfort
6.6Food
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.

Bad baggage and people management at boarding forcing me to dispatch my bad despite being the perfect size and respecting everything perfectly, whereas many did not and many free empty spots on the plane as usual… making me loose time and my planned bus at arrival to go to Geneva. Costing me 100 euros extra! So Brussels airlines needs to refund me

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 ?

In business class overhead bins were minuscule. Had to use cabin staff to find a place for my carry-on bag. Boarding process was shambolic, as “passengers who needed assistance in boarding” absorbed an excessive amount of time and attention that Aer Lingus was apparently unprepared for.

Aer Lingus was fabulous.nhowever, Aiirfare Assist who Kayak routes me to to purchase tickets for m was awful. They messed up my reservation so bad that after about six hours on the phone with them over the week before departure, I had been choice but to show up at the airport. The Aer Lingus staff were amazing and got it sorted out but I would recommend not using Airfare Assist.

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.

No entertained. food and beverages were not complimentary. they lost my checked luggage which made my 10 day vacation unpleasant.

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

The ease of boarding was good. I wish they had something to eat on the plane.

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. We were told we'd 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. 😕

Good service. No complementary food for international flight. WiFi kinda pricey. Got the job done for the right price.

For a four hour flight, I was disappointed that everything was for purchase except for coffee, tea, or water. The disembarking in Iceland was so inefficient and time-consuming. We landed and stopped in the middle of the tarmac, had to disembark in the rain, and then squeeze into a bus which took us to the airport. Crazy! How does that work in winter?

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.

Smooth efficient airline. Think they should have their own bag drop as the queue took 30mins to bmscan and drop

Good. Lacking overhead bin space. No food offered but you can order online or in flight and pay for snacks.

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:

I flew from Brussels to Munich, then from Munich to Denver. The flight from Brussels was only about 2.5 hours and it was okay. But the flight from Munich was about 12 hours and we sat on the plane for a very long time after everyone boarded. I paid something like $75 for a “preferred” seat in economy and it was so cramped my knees rubbed against the hard shell pocket. You couldn’t turn your legs to the side because the passenger next to you was too close. I was on the aisle but couldn’t put my leg out because there was often traffic or carts. Maybe I’m expecting too much but on such a long flight I’d like to see more comfortable seats. I think it was a United A380 plane. I won’t be flying anywhere that far away again. My legs and feet are still swollen 4 days later.

Everything you need to know for your flight from Brussels 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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