$361 Find Cheap Flights from Brussels to Illinois - Compare and Save

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 9/24. 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

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals
Booking Insights
Flight Deals

Book Cheap Brussels 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 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 24 - Sun, Aug 30
Lufthansa Logo
6:20 am - 1:25 pm
BRU
-
STL
14h 05m
1 stop
Lufthansa Logo
3:30 pm - 11:50 am
STL
-
BRU
13h 20m
1 stop
$745Lufthansa
Mon, Aug 24 - Sun, Aug 30
Lufthansa Logo
6:20 am - 1:25 pm
BRU
-
STL
14h 05m
1 stop
Lufthansa Logo
3:30 pm - 11:50 am
STL
-
BRU
13h 20m
1 stop
$755Lufthansa
Mon, Aug 24 - Sun, Aug 30
Lufthansa Logo
6:20 am - 1:25 pm
BRU
-
STL
14h 05m
1 stop
Lufthansa Logo
12:27 pm - 7:45 am
STL
-
BRU
12h 18m
1 stop
$757Lufthansa
Mon, Aug 24 - Sun, Aug 30
Multiple Airlines Logo
6:20 am - 1:25 pm
BRU
-
STL
14h 05m
1 stop
Multiple Airlines Logo
9:30 am - 7:10 am
STL
-
BRU
14h 40m
2 stops
$760Multiple Airlines
Mon, Aug 24 - Sun, Aug 30
Multiple Airlines Logo
6:20 am - 3:38 pm
BRU
-
STL
16h 18m
2 stops
Multiple Airlines Logo
9:30 am - 7:10 am
STL
-
BRU
14h 40m
2 stops
$761Multiple Airlines
Mon, Aug 24 - Sun, Aug 30
Multiple Airlines Logo
6:20 am - 1:25 pm
BRU
-
STL
14h 05m
1 stop
Multiple Airlines Logo
1:00 pm - 7:15 am
STL
-
BRU
11h 15m
1 stop
$762Multiple Airlines
Mon, Aug 24 - Sun, Aug 30
Air Canada Logo
9:30 am - 6:42 pm
BRU
-
STL
16h 12m
1 stop
Air Canada Logo
12:10 pm - 8:00 pm
STL
-
BRU
24h 50m
2 stops
$765Air Canada
Sat, Aug 22 - Mon, Dec 14
Air Canada Logo
9:30 am - 6:42 pm
BRU
-
STL
16h 12m
1 stop
Air Canada Logo
7:33 am - 7:50 am
STL
-
BRU
17h 17m
2 stops
$766Air Canada
Fri, Oct 2 - Mon, Oct 5
Delta Logo
10:25 am - 2:15 pm
BRU
-
ORD
10h 50m
1 stop
Delta Logo
11:29 am - 7:35 am
ORD
-
BRU
13h 06m
2 stops
$781Delta
Mon, Sep 28 - Sun, Nov 29
Delta Logo
9:45 am - 6:33 pm
BRU
-
MDW
15h 48m
2 stops
Delta Logo
9:30 am - 10:55 am
MDW
-
BRU
18h 25m
2 stops
$782Delta
Booking Insights

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.

How much is a round-trip flight from Brussels 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 Brussels to Illinois departing in October.

What is the cheapest Brussels to Illinois flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Illinois from Brussels found in the last 5 days was to Chicago, at $780 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 5 days was $780.

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

The average price for all round-trip flights from Brussels to Illinois depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Illinois is generally in the morning, when round-trip flights cost $874 on average. The most expensive time of day to fly to Illinois is generally in the morning, which is peak travel time and where the average cost of a ticket is $874.

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 August, when tickets cost $374 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $594 and $519 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 Mondays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from Illinois, Tuesday 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, which saves you about 43% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 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.

Reviews of the top 4 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
Scandinavian AirlinesOverall score based on 1862 reviews
6.7Entertainment
7.3Comfort
6.7Food
8.0Crew
7.7Boarding
Airline reviews

It was ok but no WiFi I think I’ll fly Iceland air next time

6.0 GoodEmperor Billy, Jun 2026
CPH - IAD
Read more Scandinavian Airlines reviews

It was ok but no WiFi I think I’ll fly Iceland air next time

I feel the service staff do not treat American customers well. I also feel there may be discrimination against minorities.

Yes avoid JFK airport at all costs. A horror to navigate.

My daughter always gets sick when we order the gluten free meal option. Internet didn’t work as advertised.

The flight was very cold, and the seats were rather uncomfortable. The food has been better on our other SAS experiences. Most significantly, the luggage with most of my wife's personal items and clothes didn't make the flight. Hoping for a quick resolution, but no real opportunity to speak with a Human has us concerned.

It was so hot on the plane. No air jets above the seats

Please see my comments for the flight from Chicago to Copenhagen

We were sitting in SAS plus. Super friendly, service that went above and beyond on a Full Flight too! Meals were deliscious and trays were cleared promptly. Generous drinks offered throughout the flight. Would like to suggest better movies on offer to watch.... In all genres and maybe more cooking shows? There was only 1, Nadia's Everyday Baking... Thank you

This was my first time flying SAS and used them for 4 flights. The crews, flight and communication was outstanding. I flew premium economy and was extremely impressed by their SAS lounges. I will 100% ise SAS again. Everyone was so pleasant!

little entertainment choices. Seat/bed too firm an no sleeping mat

The flight was delayed an hour and a half while you tried to fix the plane so I missed my connecting flight in Chicago. In Chicago, it took an hour to get the luggage. Then the conveyor belt was broken where I have to transfer my flight from an international flight to the continuing flight so I had to carry a large suitcase through the airport. The elevators were broken in the airport. I paid people to carry the luggage for me up the escalators in two different areas. The person who helped me get the new flight was outstanding. The temperature in the airport in Chicago was horrible. We were all sweating. It was the day from hell. That was after two hours in a security line in Athens. I have TSA pre-checked and global entry and I still waited. Two hours in a security line. Something has got to be done to stream line this service. After I’ve been through all of that in Athens, why do I have to go through it again in Chicago. It was the worst travel experience I have had in a long time. Your bathrooms have gotten so small that you can hardly get your butt on the toilet. You’ve taken the airspace out of the inside of the top of the toilet. It really makes for a miserable experience. Also on a 4 1/2 hour flight from Chicago to Los Angeles. The only thing we’re given is a bag of pretzels. REALLY!!

1 flight cancelled Had to fly out of different city Flight at new departure city was delayed 3 hours causing us to miss connecting flights. By the time we did make it to Prague our luggage did not. Had to wait day and a half for luggage to be delivered. Customer service was not good. Agents did not arrive at gate until 5-10 minutes before boarding

Awful. Delayed flights, missed connection to Toronto. Hotel vouchers were for already booked hotels x3. Giant waste of my time

Everything works smoothly once I got to Brussels. Flying with United Airlines from Atlanta to Chicago and Leaving Chicago for Brussels was a nightmare though. Slept at the airport in Chicago because my flight got delayed from Atlanta to Chicago. No accommodation provided because united airlines said I had economy ticket.

In general, flight attendants were not very welcoming. Because of delays in departure and luggage handling, we missed our connecting flight. Offered a later flight on standby but available seats were then taken by 4 or 5 airline crew so slept at airport and got home next day. I am a frequent traveler, and this experience was the worst.

The flight was excellent. The crew was great. The food offerings were very good.

Liked the excellent United crew, the food selection, the comfortable cabin and the excellent movie and tv shows selection. The interface on the screen is also excellent and gives the option to let the crew know to wake you up for meals, or not. I disliked the onboarding experience at the Brussels airport. The process is convoluted and was not explained to any passengers. I also don't understand why thee is an additional security screening when getting off the plane from Africa, when there was none when getting off the plane from the US.

Worst and most inattentive in-flight service I've ever had.

The 787 Dreamliner was probably the smoothest aircraft I have ever flown on. Made for a lovely trip

It was a good flight. The entertainment could be better.

Unlike my prior three connections on this latest journey, this flight was fairly good. Only issue was boarding as it was once again one of those Icelandic issues of bunch up, walk in the rain to a bus that then has you run up three flights of stairs to board the plain. I was in Saga class but the bus scramble eliminates any chance you get on first and have to then find a place to squeeze your carry on into an overhead that the people in economy populate so they can grab it on their way out up front. But unlike other Icelandic flights this journey I did find more the of the business class like accommodations then the other air segments. This one found a pillow and blanket waiting for me and I actually received a small cup of sparkling wine and had a bottle of water in place. Service was attentive and the flight departed and arrived on time. Received a menu and had choices of a hot or cold meal. I choose the hot which was cod and it was good. Decent size portion, salad and a choice of dinner rolls. Beverage menu was a selection of wines, beer and soft drinks. Desert was a small Tiramisu. Overall the six hour flight was a good experience for the price point.

We paid for saga class, which is the business class for international. My seat was broken and did not recline and my monitor for in-flight entertainment was broken.

The flight itself was fine, even with a one-hour delay leaving on the Reykjavik tarmac (the lost time was made up during flight). Our experience at the Reykjavik airport on arrival was terrible due mostly to the one hour it took for passport control. Only two stations were open for our category, and the room was full with a huge crowd.

Awful. The Iceland airport was a complete mess. Boarding was a chaotic, the seats were awful, there was a group of rowdy 20 something men in our row hooting and hollering, ordering alcoholic drink after drink. Yelling and laughing at the top of their lungs and the crew just went along with it. Passengers complained to the men, asking if they could keep it down (it was a night time flight so people wanted to sleep). They never listened crew continued to laugh with them, flirt with them and serve them more drinks. No free food or snacks, seats were horribly uncomfortable. Worst flight I've had in a long time

At least one soda free, felt like I was nickeled to death.

Friendly flight crew. Airplane (757) configured as a domestic flight (no lie-flat seats) & no advanced meal selection.

The Icelandair crew was so kind!!! Thank you for making my first trip to Paris a great one!

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..

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

We had to be bussed to the plane. And it was raining. Not a pleasant experience.

The legroom was lacking and the entertainment system lacked adequate selection of older films. Modern films are generally not very good.

Perfect airline, super friendly, great service, tasty food. Would fly again.

Everything could have been better. What needed to be wrong with United went wrong

It was good. The seats in economy weren’t bad

Very good. Comfortable and I felt well taken care of from start to finish

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.

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.

On Time departure and arrival Entertainment system not very userfriendly

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.