Cheap flights from Illinois to Brussels from $336
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Brussels departing on 9/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Round-trip
1 adult
Economy
0 bags
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Cheap round-trip flights
KAYAK's recommended round-trip deals from the most popular airlines that fly from Illinois to Brussels.
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.
United Airlines flights from Illinois to Brussels
Our best United Airlines deals on Illinois to Brussels flight tickets
United Airlines![United Airlines]()
May 14![United Airlines]()
May 21
STL1:30 pmLambert-St Louis
11h 35m
1 stop
BRU8:05 amBrussels Bruxelles-National
BRU10:00 amBrussels Bruxelles-National
35h 53m
2 stops
STL2:53 pmLambert-St Louis
United Airlines![United Airlines]()
May 14![United Airlines]()
May 21
STL1:30 pmLambert-St Louis
13h 15m
2 stops
BRU9:45 amBrussels Bruxelles-National
BRU10:00 amBrussels Bruxelles-National
31h 49m
2 stops
STL10:49 amLambert-St Louis
Virgin Atlantic flights from Illinois to Brussels
Our best Virgin Atlantic deals on Illinois to Brussels flight tickets
Virgin Atlantic![Virgin Atlantic]()
Aug 17![Virgin Atlantic]()
Sep 14
EVV10:05 amEvansville Dress Regional
15h 35m
2 stops
BRU8:40 amBrussels Bruxelles-National
BRU10:45 amBrussels Bruxelles-National
13h 10m
1 stop
EVV4:55 pmEvansville Dress Regional
Virgin Atlantic![Virgin Atlantic]()
Aug 12![Virgin Atlantic]()
Aug 19
MDW10:35 amChicago Midway
15h 05m
1 stop
BRU8:40 amBrussels Bruxelles-National
BRU10:45 amBrussels Bruxelles-National
18h 02m
2 stops
MDW9:47 pmChicago Midway
See travel insights to Brussels from
How to get the cheapest flight ticket from Illinois to Brussels
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
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Other information
What is the cheapest month to fly to Brussels?
In general, October is the cheapest month to fly from Illinois to Brussels. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $565. If you are unable to visit Brussels during the month of October, then departing from Illinois during the month February is also very affordable. Most momondo users find prices during this month for around $591.
What is the cheapest day to depart on your flight to Brussels?
On average, the least expensive day to fly to Brussels from Illinois is on a Monday. momondo users have found tickets for Monday departures for as low as $1,065. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Thursday is the most expensive day to depart from Illinois because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,369.
What is the cheapest time of day to depart on your flight to Brussels?
According to our data, the cheapest time of day to fly to Brussels is in the evening. momondo users have found flights departing from Illinois to Brussels in the evening for as low as $579. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive with an average ticket price of $1,197.
What is the cheapest Illinois to Brussels flight route?
Fly from Chicago O'Hare Intl to Brussels Bruxelles-National for the best Illinois - Brussels flight prices
How far in advance should I book a flight to Brussels?
You are more likely to see cheaper flights to Brussels from Illinois when booking 16 weeks ahead of your departure date. In general, you can expect to find flights to Brussels for around $842 when searching 16 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Brussels from Illinois for as low as $697 on momondo.
What cabin class options are available on Illinois to Brussels flights?
There are 3 cabin classes available to choose from on Illinois to Brussels 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?
Scandinavian Airlines, TAP AIR PORTUGAL, and Icelandair are the most popular carriers operating from Illinois to Brussels
What airlines fly to Brussels?
United Airlines, Scandinavian Airlines and Aer Lingus are the top three most popular airlines that fly to Brussels from Illinois according to our data. United Airlines is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Brussels. Keep in mind that there are 8 different airlines that fly to Brussels on a routine basis, so you have a few additional options to choose from.
How many flights depart from Illinois to Brussels on average per day?
The number of flights available between Illinois and Brussels 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 on average per week?
As of April 2025, 35 flights take off from Illinois and land in Brussels 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 flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Illinois to Brussels
When did momondo last update prices for flights from Illinois to Brussels?
Prices for flights from Illinois to Brussels were last updated today.
How many operators does momondo search for flights from Illinois to Brussels?
As of April 2025, there are 8 operators available to choose from for flights from Illinois to Brussels.
How old do you have to be to fly from Illinois to Brussels?
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.
What documentation or ID do you need to fly to Brussels?
The travel and health documents you'll need for your trip to Brussels 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. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
Best airlines flying from Illinois to Brussels
Compare and see reviews for airlines that fly from Illinois to Brussels with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $397 | Free Cancellation | Rating 7.3 1,335 reviews | |||
| PriceFrom $405 | Free Cancellation | Rating 7.0 481 reviews | |||
| PriceFrom $492 | Free Cancellation | Rating 7.3 3,767 reviews | |||
| PriceFrom $512 | Free Cancellation | Rating 7.0 1,063 reviews | |||
| PriceFrom $518 | Free Cancellation | Rating 7.1 1,839 reviews | |||
| PriceFrom $724 | Free Cancellation | Rating 7.4 8,667 reviews | |||
| PriceFrom $754 | Free Cancellation | Rating 6.7 7,011 reviews | |||
| PriceFrom $813 | Free Cancellation | Rating 7.3 345 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Illinois to Brussels?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Illinois to Brussels. momondo saves you time and could save you money on your trip.
Can I find flights from Illinois to Brussels with flexible booking policies on momondo?
Yes. All flights to Brussels from Illinois on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Illinois to Brussels?
Once you have performed a search for Illinois to Brussels flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from Illinois to Brussels right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Illinois to Brussels flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.