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Cheap flights from Illinois to Brussels from $244

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 11/7. 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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Find the cheapest flights from Illinois to Brussels

Cheap round-trip flights

Scandinavian Airlines Logo
7:10 am - 9:40 amORD-BRU
19h 30m2 stops
Scandinavian Airlines Logo
10:20 am - 4:45 pmBRU-ORD
13h 25m1 stop
$421Scandinavian Airlines
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Thu, Nov 13 - Wed, Nov 19
Scandinavian Airlines Logo
7:10 am - 2:30 pmORD-BRU
24h 20m2 stops
Scandinavian Airlines Logo
10:20 am - 4:45 pmBRU-ORD
13h 25m1 stop
$422Scandinavian Airlines
Find Deal
Tue, Nov 18 - Sun, Nov 23
Multiple Airlines Logo
6:30 pm - 10:20 pmORD-CRL
20h 50m2 stops
Multiple Airlines Logo
6:20 am - 5:20 pmCRL-ORD
18h 00m2 stops
$525Multiple Airlines
Find Deal
Sun, Nov 16 - Tue, Nov 25
Multiple Airlines Logo
8:40 am - 12:00 pmORD-CRL
20h 20m2 stops
Multiple Airlines Logo
6:55 am - 9:05 pmCRL-ORD
20h 10m2 stops
$578Multiple Airlines
Find Deal
Wed, Oct 22 - Wed, Oct 29
United Airlines Logo
7:00 am - 7:50 amSTL-BRU
17h 50m2 stops
United Airlines Logo
10:00 am - 12:28 pmBRU-STL
33h 28m2 stops
$584United Airlines
Find Deal
Wed, Nov 12 - Thu, Nov 27
United Airlines Logo
10:00 am - 8:55 amSTL-BRU
15h 55m1 stop
United Airlines Logo
10:00 am - 2:25 pmBRU-STL
35h 25m2 stops
$634United Airlines
Find Deal
Wed, Nov 12 - Thu, Nov 27
Air Canada Logo
4:05 pm - 7:50 amSTL-BRU
33h 45m2 stops
Air Canada Logo
10:00 am - 3:29 pmBRU-STL
35h 29m2 stops
$655Air Canada
Find Deal
Sun, Mar 15 - Sun, Mar 22
Air Canada Logo
5:27 pm - 7:50 amSTL-BRU
31h 23m2 stops
Air Canada Logo
10:00 am - 3:29 pmBRU-STL
36h 29m2 stops
$684Air Canada
Find Deal
Mon, Dec 15 - Thu, Dec 25
Lufthansa Logo
11:49 am - 8:05 amSTL-BRU
13h 16m1 stop
Lufthansa Logo
5:30 pm - 1:55 pmBRU-STL
27h 25m1 stop
$712Lufthansa
Find Deal
Wed, Nov 12 - Thu, Nov 27
Lufthansa Logo
3:50 pm - 10:10 amSTL-BRU
11h 20m1 stop
Lufthansa Logo
7:30 pm - 1:55 pmBRU-STL
25h 25m1 stop
$757Lufthansa
Find Deal
Wed, Nov 12 - Thu, Nov 27

Air France flights from Illinois to Brussels

Our best Air France deals on Illinois to Brussels flight tickets
Air France
Oct 6
MDW5:04 pmChicago Midway
32h 36m
1 stop
BRU8:40 amBrussels Bruxelles-National
Oct 9
BRU10:45 amBrussels Bruxelles-National
18h 29m
2 stops
MDW10:14 pmChicago Midway
$1,832
Find similar
Air France
Oct 8
MDW5:04 pmChicago Midway
32h 36m
1 stop
BRU8:40 amBrussels Bruxelles-National
Oct 11
BRU10:45 amBrussels Bruxelles-National
18h 29m
2 stops
MDW10:14 pmChicago Midway
$1,963
Find similar

Delta flights from Illinois to Brussels

Our best Delta deals on Illinois to Brussels flight tickets
Delta
Mar 11
MDW1:05 pmChicago Midway
12h 55m
1 stop
BRU8:00 amBrussels Bruxelles-National
Apr 2
BRU10:45 amBrussels Bruxelles-National
18h 01m
1 stop
MDW9:46 pmChicago Midway
$767
Find similar
Delta
Mar 14
MDW5:25 pmChicago Midway
32h 35m
1 stop
BRU8:00 amBrussels Bruxelles-National
Mar 31
BRU10:45 amBrussels Bruxelles-National
18h 01m
1 stop
MDW9:46 pmChicago Midway
$773
Find similar
Delta
Mar 15
MDW1:05 pmChicago Midway
12h 55m
1 stop
BRU8:00 amBrussels Bruxelles-National
Mar 31
BRU10:25 amBrussels Bruxelles-National
14h 43m
2 stops
MDW6:08 pmChicago Midway
$783
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Brussels that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated September 25, 2025.
Use the filters below to find and compare flights from Illinois to Brussels that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Thu 11/13

7:10 am-9:40 am

2 stops19h 30m

Brussels Bruxelles-National

Wed 11/19

10:20 am-4:45 pm

1 stop13h 25m

$421

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Tue 11/18

7:10 am-2:30 pm

2 stops24h 20m

Brussels Bruxelles-National

Sun 11/23

10:20 am-4:45 pm

1 stop13h 25m

$422

ChicagoBrussels

ORD - CRL

ORDCRL

Chicago O'Hare Intl

Sun 11/16

6:30 pm-10:20 pm

2 stops20h 50m

Charleroi Brussels

Tue 11/25

6:20 am-5:20 pm

2 stops18h 00m

$525

ChicagoBrussels

ORD - CRL

ORDCRL

Chicago O'Hare Intl

Wed 10/22

8:40 am-12:00 pm

2 stops20h 20m

Charleroi Brussels

Wed 10/29

6:55 am-9:05 pm

2 stops20h 10m

$578

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

7:00 am-7:50 am

2 stops17h 50m

Brussels Bruxelles-National

Thu 11/27

10:00 am-12:28 pm

2 stops33h 28m

$584

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

10:00 am-8:55 am

1 stop15h 55m

Brussels Bruxelles-National

Thu 11/27

10:00 am-2:25 pm

2 stops35h 25m

$634

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 3/15

4:05 pm-7:50 am

2 stops33h 45m

Brussels Bruxelles-National

Sun 3/22

10:00 am-3:29 pm

2 stops35h 29m

$655

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 12/15

5:27 pm-7:50 am

2 stops31h 23m

Brussels Bruxelles-National

Thu 12/25

10:00 am-3:29 pm

2 stops36h 29m

$684

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

11:49 am-8:05 am

1 stop13h 16m

Brussels Bruxelles-National

Thu 11/27

5:30 pm-1:55 pm

1 stop27h 25m

$712

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

3:50 pm-10:10 am

1 stop11h 20m

Brussels Bruxelles-National

Thu 11/27

7:30 pm-1:55 pm

1 stop25h 25m

$757

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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

What is the cheapest month to fly to Brussels?

In general, April 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 $581. If you are unable to visit Brussels during the month of April, then departing from Illinois during the month February is also very affordable. Most momondo users find prices during this month for around $592.

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 Wednesday. momondo users have found tickets for Wednesday departures for as low as $1,103. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Saturday 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 $1,396.

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 $1,189.

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 weeks ahead of your departure date. In general, you can expect to find flights to Brussels for around $780 when searching 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 $614 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.

Cheap Illinois to Brussels flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Brussels

Fastest flight time

8h 00m

Direct flights

Every day

Airports in Brussels

1 airport
The fastest flight from Illinois to Brussels takes 8h 00m
Direct flights go from Illinois to Brussels every day.
There is 1 airport near Brussels: Brussels Bruxelles-National (BRU)
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  • 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?

  • 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
Scandinavian AirlinesPriceFrom $312Free CancellationRating
7.4
1,493 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom $405Free CancellationRating
7.0
545 reviews
Search Icelandair flights
Turkish AirlinesPriceFrom $492Free CancellationRating
7.3
3,976 reviews
Search Turkish Airlines flights
KLMPriceFrom $506Free CancellationRating
7.8
1,391 reviews
Search KLM flights
British AirwaysPriceFrom $551Free CancellationRating
6.7
7,399 reviews
Search British Airways flights
Aer LingusPriceFrom $581Free CancellationRating
7.2
1,302 reviews
Search Aer Lingus flights
United AirlinesPriceFrom $590Free CancellationRating
7.4
8,928 reviews
Search United Airlines flights
TAP AIR PORTUGALPriceFrom $744Free CancellationRating
7.1
1,990 reviews
Search TAP AIR PORTUGAL flights
LufthansaPriceFrom $754Free CancellationRating
6.8
7,424 reviews
Search Lufthansa flights

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.

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Find better results for your trip to Belgium

Fly into one of these airports located in Brussels

Airports listed have a maximum distance of 27.4 mi from Brussels
Brussels Bruxelles-National Airport
Charleroi Brussels Airport