Cheap flights from Illinois to Brussels from $343
This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Brussels departing on 9/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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1 adult
Economy
0 bags
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Cheap round-trip flights
These are some of the best round-trip flight deals from Illinois to Brussels that have been recently found on momondo from popular airlines, departing in the coming months.
Cheap one-way flights
Flying one-way? These are some of the best deals recently discovered on momondo for flights from Illinois to Brussels.
Cheap last minute flights
Planning a quick getaway from Illinois to Brussels? These are the last-minute flight deals available now.
Cheap direct flights
If you prefer a non-stop journey, check out our latest direct flight deals to Brussels, so you can enjoy a seamless trip without layovers.
Icelandair flights from Illinois to Brussels Bruxelles-National Airport
Our best Icelandair deals on Illinois to Brussels Bruxelles-National Airport flight tickets
Icelandair![Icelandair]()
Aug 2![Icelandair]()
Aug 20
ORD7:25 pmChicago O'Hare Intl
10h 25m
1 stop
BRU12:50 pmBrussels Bruxelles-National
BRU1:50 pmBrussels Bruxelles-National
14h 25m
1 stop
ORD9:15 pmChicago O'Hare Intl
Icelandair![Icelandair]()
Aug 9![Icelandair]()
Aug 16
ORD7:25 pmChicago O'Hare Intl
10h 25m
1 stop
BRU12:50 pmBrussels Bruxelles-National
BRU1:50 pmBrussels Bruxelles-National
14h 25m
1 stop
ORD9:15 pmChicago O'Hare Intl
Air Canada flights from Illinois to Brussels Bruxelles-National Airport
Our best Air Canada deals on Illinois to Brussels Bruxelles-National Airport flight tickets
Air Canada![Air Canada]()
Aug 1![Air Canada]()
Aug 13
STL5:30 pmLambert-St Louis
55h 20m
2 stops
BRU7:50 amBrussels Bruxelles-National
BRU10:00 amBrussels Bruxelles-National
17h 00m
1 stop
STL8:00 pmLambert-St Louis
Air Canada![Air Canada]()
Aug 2![Air Canada]()
Aug 20
ORD3:50 pmChicago O'Hare Intl
33h 00m
1 stop
BRU7:50 amBrussels Bruxelles-National
BRU10:00 amBrussels Bruxelles-National
15h 54m
2 stops
ORD6:54 pmChicago O'Hare Intl
See travel insights to Brussels from
How to get the cheapest flight ticket from Illinois to Brussels Bruxelles-National Airport
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
Prices
Airlines
Other information
What is the cheapest month to fly to Brussels Bruxelles-National Airport?
The cheapest month to fly to Brussels Bruxelles-National Airport from Illinois is in October. Flight prices, which tend to average around $565, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of October, then book flights to Brussels Bruxelles-National Airport from Illinois during February instead. Flights to Brussels Bruxelles-National Airport in February, while not as cheap as those in October, still average around $591.
What is the cheapest day to depart on your flight to Brussels Bruxelles-National Airport?
The cheapest day to depart from Illinois to Brussels Bruxelles-National Airport is on a Monday. Travelers who choose to depart for Brussels Bruxelles-National Airport on a Monday will often find tickets for as low as $1,065. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to Brussels Bruxelles-National Airport for around $1,369.
What is the cheapest time of day to depart on your flight to Brussels Bruxelles-National Airport?
Our most recent data shows that the best time of day to fly to Brussels Bruxelles-National Airport is in the evening. Flights from Illinois to Brussels Bruxelles-National Airport during this time can be as low as $579. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,197 on average. Flights to Brussels Bruxelles-National Airport from Illinois in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.
What is the cheapest Illinois to Brussels Bruxelles-National flight route?
Fly from Chicago O'Hare Intl to Brussels Bruxelles-National for the best Illinois - Brussels Bruxelles-National flight prices
How far in advance should I book a flight to Brussels Bruxelles-National Airport?
You are more likely to see cheaper flights to Brussels Bruxelles-National Airport from Illinois when booking 21 weeks ahead of your departure date. In general, you can expect to find flights to Brussels Bruxelles-National Airport for around $841 when searching 21 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Brussels Bruxelles-National Airport from Illinois for as low as $716 on momondo.
What cabin class options are available on Illinois to Brussels Bruxelles-National flights?
There are 3 cabin classes available to choose from on Illinois to Brussels Bruxelles-National flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Illinois to Brussels Bruxelles-National?
Icelandair, Scandinavian Airlines, and Delta are the most popular carriers operating from Illinois to Brussels Bruxelles-National
What airlines fly to Brussels Bruxelles-National Airport?
United Airlines, Scandinavian Airlines and Aer Lingus are the top three most popular airlines that fly to Brussels Bruxelles-National Airport from Illinois according to our data. United Airlines is the first choice among our users, with 35% of people opting to fly with this airline when traveling to Brussels Bruxelles-National Airport. Keep in mind that there are 8 different airlines that fly to Brussels Bruxelles-National Airport on a routine basis, so you have a few additional options to choose from.
How many flights depart from Illinois to Brussels Bruxelles-National Airport on average per day?
The number of flights available between Illinois and Brussels Bruxelles-National Airport is 5 per day as of April 2025. The most frequent departure time is 5:00PM, with 100% of daily flights leaving in the afternoon.
How many flights depart from Illinois to Brussels Bruxelles-National Airport on average per week?
As of April 2025, 35 flights take off from Illinois and land in Brussels Bruxelles-National Airport each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.
Cheap Illinois to Brussels Bruxelles-National Airport flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Illinois to Brussels Bruxelles-National Airport
When did momondo last update prices for flights from Illinois to Brussels Bruxelles-National Airport?
Prices for flights from Illinois to Brussels Bruxelles-National Airport were last updated today.
How many operators does momondo search for flights from Illinois to Brussels Bruxelles-National Airport?
As of April 2025, there are 8 operators available to choose from for flights from Illinois to Brussels Bruxelles-National Airport.
How old do you have to be to fly from Illinois to Brussels Bruxelles-National Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Illinois to Brussels Bruxelles-National Airport.
What documentation or ID do you need to fly to Brussels Bruxelles-National Airport?
The travel and health documents you'll need for your trip to Brussels Bruxelles-National Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Brussels Bruxelles-National Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Illinois to Brussels Bruxelles-National Airport?
Based on momondo bookings for flights between Illinois and Brussels Bruxelles-National Airport, the leading plane model is Boeing 787 Dreamliner, making up 42.52% of the total bookings. Other popular models include Boeing 787-10 Dreamliner with 32.75%, Boeing 787-8 Dreamliner with 7.16%, and Airbus A330 with 4.99%.
Best airlines flying from Illinois to Brussels Bruxelles-National Airport
Compare and see reviews for airlines that fly from Illinois to Brussels Bruxelles-National Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $397 | Free Cancellation | Rating 7.3 1,349 reviews | |||
| PriceFrom $405 | Free Cancellation | Rating 7.0 487 reviews | |||
| PriceFrom $492 | Free Cancellation | Rating 7.3 3,790 reviews | |||
| PriceFrom $512 | Free Cancellation | Rating 7.0 1,076 reviews | |||
| PriceFrom $518 | Free Cancellation | Rating 7.1 1,851 reviews | |||
| PriceFrom $724 | Free Cancellation | Rating 7.4 8,696 reviews | |||
| PriceFrom $754 | Free Cancellation | Rating 6.7 7,045 reviews | |||
| PriceFrom $813 | Free Cancellation | Rating 7.3 346 reviews |
Traveling to a place near Brussels?
Book flights to Brussels if you plan to visit one of these locationsBruges
Ghent
Leuven
Hasselt
Spa
Charleroi
Namur
Genk
Aalst
Mons
Dinant
Zaventem
Waterloo
Mechelen
Knokke-Heist
Tournai
Durbuy
Herentals
Oostkamp
Ypres
Why use momondo?
Why should I use momondo to find a flight deal from Illinois to Brussels?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Illinois to Brussels for you.
Can I find flights from Illinois to Brussels with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Illinois to Brussels flights to just show those with flexible booking policies.
How can momondo help me find flights from Illinois to Brussels?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Illinois to Brussels.
I’m not ready to book a flight from Illinois to Brussels right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Brussels, momondo offers a useful price alert feature which will track prices for flights to Brussels from Illinois and alert you when they change.