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Cheap flights from Illinois to Brussels from $340

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 6/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to Brussels

Cheap round-trip flights

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
7:15 pm - 7:50 pm
ORD
-
BRU
17h 35m
1 stop
Scandinavian Airlines Logo
8:30 pm - 5:45 pm
BRU
-
ORD
28h 15m
1 stop
$676Scandinavian Airlines
Wed, Sep 30 - Sat, Oct 24
Turkish Airlines Logo
11:25 am - 10:10 am
ORD
-
BRU
15h 45m
1 stop
Turkish Airlines Logo
6:55 pm - 9:40 am
BRU
-
ORD
21h 45m
1 stop
$682Turkish Airlines
Wed, Sep 16 - Tue, Sep 22
Turkish Airlines Logo
11:25 am - 10:10 am
ORD
-
BRU
15h 45m
1 stop
Turkish Airlines Logo
11:20 am - 9:40 am
BRU
-
ORD
29h 20m
1 stop
$683Turkish Airlines
Wed, Sep 16 - Tue, Sep 22
Multiple Airlines Logo
9:35 pm - 3:05 pm
STL
-
BRU
10h 30m
1 stop
Multiple Airlines Logo
7:05 pm - 7:46 pm
BRU
-
STL
31h 41m
2 stops
$867Multiple Airlines
Wed, Sep 30 - Mon, Oct 5
British Airways Logo
9:35 pm - 9:55 am
STL
-
BRU
29h 20m
1 stop
British Airways Logo
8:50 pm - 7:30 pm
BRU
-
STL
29h 40m
1 stop
$878British Airways
Wed, Sep 30 - Mon, Oct 5
Multiple Airlines Logo
9:40 pm - 8:00 pm
STL
-
BRU
15h 20m
1 stop
Multiple Airlines Logo
8:40 pm - 7:46 pm
BRU
-
STL
30h 06m
2 stops
$883Multiple Airlines
Sun, Sep 20 - Sun, Sep 27
American Airlines Logo
9:35 pm - 8:25 pm
STL
-
BRU
15h 50m
1 stop
American Airlines Logo
10:50 am - 11:31 pm
BRU
-
STL
19h 41m
2 stops
$928American Airlines
Wed, Sep 30 - Mon, Oct 5
British Airways Logo
9:35 pm - 8:25 pm
STL
-
BRU
15h 50m
1 stop
British Airways Logo
8:50 pm - 11:25 pm
BRU
-
STL
33h 35m
2 stops
$931British Airways
Wed, Sep 30 - Mon, Oct 5
Air Canada Logo
8:55 am - 7:50 am
STL
-
BRU
15h 55m
1 stop
Air Canada Logo
9:55 am - 6:42 pm
BRU
-
STL
39h 47m
2 stops
$994Air Canada
Wed, Jul 22 - Wed, Jul 29
American Airlines Logo
6:39 pm - 8:40 pm
EVV
-
BRU
19h 01m
2 stops
American Airlines Logo
10:50 am - 12:21 am
BRU
-
EVV
20h 31m
2 stops
$1,253American Airlines
Thu, Jun 18 - Thu, Jun 25

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Turkish Airlines flights from Illinois to Brussels Bruxelles-National Airport

Our best Turkish Airlines deals on Illinois to Brussels Bruxelles-National Airport flight tickets
Turkish Airlines
Sep 16
ORD11:25 amChicago O'Hare Intl
15h 45m
1 stop
BRU10:10 amBrussels Bruxelles-National
Sep 22
BRU6:55 pmBrussels Bruxelles-National
21h 45m
1 stop
ORD9:40 amChicago O'Hare Intl
$682
Turkish Airlines
Sep 16
ORD11:25 amChicago O'Hare Intl
27h 00m
1 stop
BRU9:25 pmBrussels Bruxelles-National
Sep 22
BRU11:20 amBrussels Bruxelles-National
29h 20m
1 stop
ORD9:40 amChicago O'Hare Intl
$684
Turkish Airlines
Sep 27
ORD11:25 amChicago O'Hare Intl
15h 30m
1 stop
BRU9:55 amBrussels Bruxelles-National
Oct 8
BRU6:50 pmBrussels Bruxelles-National
21h 50m
1 stop
ORD9:40 amChicago O'Hare Intl
$688

British Airways flights from Illinois to Brussels Bruxelles-National Airport

Our best British Airways deals on Illinois to Brussels Bruxelles-National Airport flight tickets
British Airways
Sep 30
STL9:35 pmLambert-St Louis
29h 20m
1 stop
BRU9:55 amBrussels Bruxelles-National
Oct 5
BRU8:50 pmBrussels Bruxelles-National
29h 40m
1 stop
STL7:30 pmLambert-St Louis
$878
British Airways
Sep 30
STL9:35 pmLambert-St Louis
15h 50m
1 stop
BRU8:25 pmBrussels Bruxelles-National
Oct 5
BRU8:50 pmBrussels Bruxelles-National
33h 35m
2 stops
STL11:25 pmLambert-St Louis
$931
British Airways
Sep 20
STL9:40 pmLambert-St Louis
15h 20m
1 stop
BRU8:00 pmBrussels Bruxelles-National
Sep 27
BRU10:40 amBrussels Bruxelles-National
15h 50m
1 stop
STL7:30 pmLambert-St Louis
$946

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Brussels Bruxelles-National Airport 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 May 4, 2026.
Use the filters below to find and compare flights from Illinois to Brussels Bruxelles-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Wed 9/30

7:15 pm-7:50 pm

1 stop17h 35m

Brussels Bruxelles-National

Sat 10/24

8:30 pm-5:45 pm

1 stop28h 15m

$676

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Wed 9/16

11:25 am-10:10 am

1 stop15h 45m

Brussels Bruxelles-National

Tue 9/22

6:55 pm-9:40 am

1 stop21h 45m

$682

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Wed 9/16

11:25 am-10:10 am

1 stop15h 45m

Brussels Bruxelles-National

Tue 9/22

11:20 am-9:40 am

1 stop29h 20m

$683

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:35 pm-3:05 pm

1 stop10h 30m

Brussels Bruxelles-National

Mon 10/5

7:05 pm-7:46 pm

2 stops31h 41m

$867

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:35 pm-9:55 am

1 stop29h 20m

Brussels Bruxelles-National

Mon 10/5

8:50 pm-7:30 pm

1 stop29h 40m

$878

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 9/20

9:40 pm-8:00 pm

1 stop15h 20m

Brussels Bruxelles-National

Sun 9/27

8:40 pm-7:46 pm

2 stops30h 06m

$883
Quickest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:35 pm-8:25 pm

1 stop15h 50m

Brussels Bruxelles-National

Mon 10/5

10:50 am-11:31 pm

2 stops19h 41m

$928

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:35 pm-8:25 pm

1 stop15h 50m

Brussels Bruxelles-National

Mon 10/5

8:50 pm-11:25 pm

2 stops33h 35m

$931

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 7/22

8:55 am-7:50 am

1 stop15h 55m

Brussels Bruxelles-National

Wed 7/29

9:55 am-6:42 pm

2 stops39h 47m

$994

EvansvilleBrussels

EVV - BRU

EVVBRU

Evansville Dress Regional

Thu 6/18

6:39 pm-8:40 pm

2 stops19h 01m

Brussels Bruxelles-National

Thu 6/25

10:50 am-12:21 am

2 stops20h 31m

$1,253

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 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

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 May. Flight prices, which tend to average around $129, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of May, then book flights to Brussels Bruxelles-National Airport from Illinois during September instead. Flights to Brussels Bruxelles-National Airport in September, while not as cheap as those in May, still average around $251.

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 Tuesday. Travelers who choose to depart for Brussels Bruxelles-National Airport on a Tuesday will often find tickets for as low as $1,047. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to Brussels Bruxelles-National Airport for around $1,381.

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 from Illinois to Brussels Bruxelles-National Airport?

You are more likely to see cheaper flights to Brussels Bruxelles-National Airport from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Brussels Bruxelles-National Airport for around $759 when searching 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 $463 on momondo.

Can stopping save me money on Illinois to Brussels Bruxelles-National Airport flights?

You could potentially save up to 71% on your flight if you consider stops on a Illinois to Brussels Bruxelles-National Airport flight.

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

Best Price Found

$638

Fastest flight time

8h 00m

Direct flights

Every day
The best one-way flight to Brussels Bruxelles-National Airport from Illinois in the past 72 hours is $638. The best round-trip flight deal from Illinois to Brussels Bruxelles-National Airport found on momondo in the last 72 hours is $1,389.
The fastest flight from Illinois to Brussels Bruxelles-National Airport takes 8h 00m
Direct flights go from Illinois to Brussels Bruxelles-National Airport every day.
Search flight deals

Frequently asked questions about flying 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?

  • 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?

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
Scandinavian AirlinesPriceFrom $298Free CancellationRating
7.4
1,769 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom $418Free CancellationRating
7.0
650 reviews
Search Icelandair flights
Turkish AirlinesPriceFrom $419Free CancellationRating
7.4
4,344 reviews
Search Turkish Airlines flights
TAP AIR PORTUGALPriceFrom $444Free CancellationRating
7.2
2,230 reviews
Search TAP AIR PORTUGAL flights
Aer LingusPriceFrom $481Free CancellationRating
7.3
1,540 reviews
Search Aer Lingus flights
United AirlinesPriceFrom $586Free CancellationRating
7.4
9,681 reviews
Search United Airlines flights
Brussels AirlinesPriceFrom $752Free CancellationRating
7.3
405 reviews
Search Brussels Airlines flights
LufthansaPriceFrom $969Free CancellationRating
6.8
7,972 reviews
Search Lufthansa flights

Traveling to a place near Brussels?

Book flights to Brussels if you plan to visit one of these locations
Ghent
Bruges
Leuven
Charleroi
Mons
Hasselt
Zaventem
Dinant
Genk
Namur
Waterloo
Durbuy
Aalst
Mechelen
Knokke-Heist
Spa
Francorchamps
Tournai
Oostkamp
Halle

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.

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