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Cheap flights from Illinois to Brussels from $268

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 2/27. 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

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Find the cheapest flights from Illinois to Brussels

Cheap round-trip flights

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
7:10 pm - 10:50 am
ORD
-
BRU
32h 40m2 stops
Scandinavian Airlines Logo
11:30 am - 4:45 pm
BRU
-
ORD
36h 15m2 stops
$459Scandinavian Airlines
Sun, Feb 15 - Tue, Feb 24
Scandinavian Airlines Logo
7:10 pm - 10:50 am
ORD
-
BRU
32h 40m2 stops
Scandinavian Airlines Logo
11:30 am - 4:45 pm
BRU
-
ORD
36h 15m2 stops
$460Scandinavian Airlines
Sun, Feb 15 - Tue, Feb 24
Multiple Airlines Logo
12:44 pm - 7:15 am
STL
-
BRU
11h 31m1 stop
Multiple Airlines Logo
7:55 pm - 11:59 pm
BRU
-
STL
35h 04m2 stops
$470Multiple Airlines
Thu, Feb 5 - Mon, Feb 9
Air Canada Logo
4:05 pm - 1:15 pm
STL
-
BRU
14h 10m2 stops
Air Canada Logo
10:00 am - 3:29 pm
BRU
-
STL
36h 29m2 stops
$486Air Canada
Mon, Feb 9 - Mon, Feb 16
Lufthansa Logo
11:22 am - 8:05 am
STL
-
BRU
13h 43m1 stop
Lufthansa Logo
10:10 am - 10:58 pm
BRU
-
STL
19h 48m1 stop
$487Lufthansa
Thu, Feb 5 - Mon, Feb 9
United Airlines Logo
8:30 am - 7:15 am
STL
-
BRU
16h 45m1 stop
United Airlines Logo
10:00 am - 2:42 pm
BRU
-
STL
34h 42m2 stops
$488United Airlines
Wed, Mar 18 - Wed, Mar 25
Lufthansa Logo
11:22 am - 8:05 am
STL
-
BRU
13h 43m1 stop
Lufthansa Logo
9:00 am - 11:59 pm
BRU
-
STL
21h 59m2 stops
$494Lufthansa
Thu, Feb 5 - Mon, Feb 9
United Airlines Logo
9:57 am - 1:15 pm
STL
-
BRU
20h 18m2 stops
United Airlines Logo
10:10 am - 4:03 pm
BRU
-
STL
12h 53m1 stop
$505United Airlines
Thu, Jan 29 - Tue, Feb 3
Air Canada Logo
11:20 am - 7:50 am
STL
-
BRU
37h 30m2 stops
Air Canada Logo
10:00 am - 9:05 pm
BRU
-
STL
18h 05m2 stops
$506Air Canada
Tue, Feb 10 - Tue, Feb 17
Multiple Airlines Logo
6:30 pm - 10:20 pm
ORD
-
CRL
20h 50m2 stops
Multiple Airlines Logo
6:20 am - 5:20 pm
CRL
-
ORD
18h 00m2 stops
$551Multiple Airlines
Sun, Feb 15 - Tue, Feb 24

United Airlines flights from Illinois to Brussels

Our best United Airlines deals on Illinois to Brussels flight tickets
United Airlines
Mar 18
STL8:30 amLambert-St Louis
16h 45m
1 stop
BRU7:15 amBrussels Bruxelles-National
Mar 25
BRU10:00 amBrussels Bruxelles-National
34h 42m
2 stops
STL2:42 pmLambert-St Louis
$488
Find similar
United Airlines
Jan 29
STL9:57 amLambert-St Louis
20h 18m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Feb 3
BRU10:10 amBrussels Bruxelles-National
12h 53m
1 stop
STL4:03 pmLambert-St Louis
$505
Find similar
United Airlines
Feb 10
STL3:11 pmLambert-St Louis
15h 04m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Feb 17
BRU10:00 amBrussels Bruxelles-National
18h 05m
2 stops
STL9:05 pmLambert-St Louis
$508
Find similar

TAP AIR PORTUGAL flights from Illinois to Brussels

Our best TAP AIR PORTUGAL deals on Illinois to Brussels flight tickets
TAP AIR PORTUGAL
May 2
ORD6:15 pmChicago O'Hare Intl
13h 50m
1 stop
BRU3:05 pmBrussels Bruxelles-National
May 13
BRU5:55 amBrussels Bruxelles-National
17h 05m
1 stop
ORD4:00 pmChicago O'Hare Intl
$515
Find similar
TAP AIR PORTUGAL
May 2
ORD6:15 pmChicago O'Hare Intl
13h 50m
1 stop
BRU3:05 pmBrussels Bruxelles-National
May 10
BRU5:55 amBrussels Bruxelles-National
17h 05m
1 stop
ORD4:00 pmChicago O'Hare Intl
$532
Find similar
TAP AIR PORTUGAL
May 13
ORD6:00 pmChicago O'Hare Intl
19h 05m
1 stop
BRU8:05 pmBrussels Bruxelles-National
May 19
BRU8:55 pmBrussels Bruxelles-National
26h 05m
1 stop
ORD4:00 pmChicago O'Hare Intl
$543
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 December 28, 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

Sun 2/15

7:10 pm-10:50 am

2 stops32h 40m

Brussels Bruxelles-National

Tue 2/24

11:30 am-4:45 pm

2 stops36h 15m

$459

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Sun 2/15

7:10 pm-10:50 am

2 stops32h 40m

Brussels Bruxelles-National

Tue 2/24

11:30 am-4:45 pm

2 stops36h 15m

$460

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 2/5

12:44 pm-7:15 am

1 stop11h 31m

Brussels Bruxelles-National

Mon 2/9

7:55 pm-11:59 pm

2 stops35h 04m

$470

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 2/9

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Mon 2/16

10:00 am-3:29 pm

2 stops36h 29m

$486

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 2/5

11:22 am-8:05 am

1 stop13h 43m

Brussels Bruxelles-National

Mon 2/9

10:10 am-10:58 pm

1 stop19h 48m

$487

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 3/18

8:30 am-7:15 am

1 stop16h 45m

Brussels Bruxelles-National

Wed 3/25

10:00 am-2:42 pm

2 stops34h 42m

$488

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 2/5

11:22 am-8:05 am

1 stop13h 43m

Brussels Bruxelles-National

Mon 2/9

9:00 am-11:59 pm

2 stops21h 59m

$494

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 1/29

9:57 am-1:15 pm

2 stops20h 18m

Brussels Bruxelles-National

Tue 2/3

10:10 am-4:03 pm

1 stop12h 53m

$505

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 2/10

11:20 am-7:50 am

2 stops37h 30m

Brussels Bruxelles-National

Tue 2/17

10:00 am-9:05 pm

2 stops18h 05m

$506

ChicagoBrussels

ORD - CRL

ORDCRL

Chicago O'Hare Intl

Sun 2/15

6:30 pm-10:20 pm

2 stops20h 50m

Charleroi Brussels

Tue 2/24

6:20 am-5:20 pm

2 stops18h 00m

$551

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 $579. If you are unable to visit Brussels during the month of April, then departing from Illinois during the month October is also very affordable. Most momondo users find prices during this month for around $600.

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 Tuesday. momondo users have found tickets for Tuesday departures for as low as $1,082. 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 $1,361.

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 $1,190.

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 $773 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 $486 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

2 airports
The fastest flight from Illinois to Brussels takes 8h 00m
Direct flights go from Illinois to Brussels every day.
There are 2 airports in Brussels. From Illinois there are direct flights to Brussels Bruxelles-National (BRU).
Search flight deals

  • 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 $298Free CancellationRating
7.4
1,630 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom $428Free CancellationRating
7.0
592 reviews
Search Icelandair flights
TAP AIR PORTUGALPriceFrom $445Free CancellationRating
7.2
2,098 reviews
Search TAP AIR PORTUGAL flights
Turkish AirlinesPriceFrom $492Free CancellationRating
7.3
4,126 reviews
Search Turkish Airlines flights
Aer LingusPriceFrom $531Free CancellationRating
7.2
1,413 reviews
Search Aer Lingus flights
British AirwaysPriceFrom $551Free CancellationRating
6.7
7,616 reviews
Search British Airways flights
United AirlinesPriceFrom $590Free CancellationRating
7.4
9,114 reviews
Search United Airlines flights
Brussels AirlinesPriceFrom $986Free CancellationRating
7.2
377 reviews
Search Brussels Airlines 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