Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Illinois to Brussels from $284

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 10/31. 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.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Illinois to Brussels

Cheap round-trip flights

Scandinavian Airlines Logo
7:20 pm - 11:55 amORD-BRU
33h 35m2 stops
Scandinavian Airlines Logo
10:20 am - 4:45 pmBRU-ORD
13h 25m1 stop
$440Scandinavian Airlines
Find Deal
Fri, Nov 28 - Mon, Dec 8
Scandinavian Airlines Logo
7:20 pm - 11:55 amORD-BRU
33h 35m2 stops
Scandinavian Airlines Logo
8:30 pm - 4:45 pmBRU-ORD
27h 15m1 stop
$441Scandinavian Airlines
Find Deal
Fri, Nov 28 - Sun, Dec 7
Logo
9:15 am - 9:00 pmSTL-BRU
28h 45m2 stops
Logo
10:25 pm - 7:38 pmBRU-STL
28h 13m2 stops
$576
Find Deal
Tue, Oct 14 - Mon, Oct 20
Logo
7:00 am - 8:05 amSTL-BRU
18h 05m1 stop
Logo
10:00 am - 2:25 pmBRU-STL
35h 25m2 stops
$583
Find Deal
Wed, Nov 12 - Thu, Nov 27
Air Canada Logo
4:05 pm - 1:15 pmSTL-BRU
38h 10m2 stops
Air Canada Logo
10:00 am - 12:28 pmBRU-STL
33h 28m2 stops
$588Air Canada
Find Deal
Wed, Nov 19 - Wed, Nov 26
United Airlines Logo
11:49 am - 8:05 amSTL-BRU
13h 16m1 stop
United Airlines Logo
10:00 am - 5:39 pmBRU-STL
14h 39m2 stops
$606United Airlines
Find Deal
Wed, Nov 19 - Wed, Nov 26
United Airlines Logo
12:31 pm - 8:55 amSTL-BRU
13h 24m1 stop
United Airlines Logo
10:00 am - 2:25 pmBRU-STL
35h 25m2 stops
$633United Airlines
Find Deal
Fri, Nov 7 - Thu, Nov 13
Air Canada Logo
4:05 pm - 1:15 pmSTL-BRU
14h 10m2 stops
Air Canada Logo
10:00 am - 5:39 pmBRU-STL
38h 39m2 stops
$638Air Canada
Find Deal
Fri, Nov 7 - Fri, Nov 14
British Airways Logo
3:23 pm - 3:25 pmSTL-BRU
17h 02m2 stops
British Airways Logo
8:45 pm - 4:40 pmBRU-STL
26h 55m2 stops
$681British Airways
Find Deal
Fri, Nov 14 - Mon, Nov 24
British Airways Logo
5:09 pm - 5:45 pmSTL-BRU
17h 36m2 stops
British Airways Logo
9:15 pm - 4:04 pmBRU-STL
25h 49m2 stops
$699British Airways
Find Deal
Tue, Oct 14 - Mon, Oct 20

Air Canada flights from Illinois to Brussels

Our best Air Canada deals on Illinois to Brussels flight tickets
Air Canada
Nov 19
STL4:05 pmLambert-St Louis
38h 10m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Nov 26
BRU10:00 amBrussels Bruxelles-National
33h 28m
2 stops
STL12:28 pmLambert-St Louis
$588
Find similar
Air Canada
Aug 10
STL1:30 pmLambert-St Louis
11h 30m
1 stop
BRU8:00 amBrussels Bruxelles-National
Aug 26
BRU10:00 amBrussels Bruxelles-National
35h 33m
2 stops
STL2:33 pmLambert-St Louis
$628
Find similar
Air Canada
Aug 11
STL1:30 pmLambert-St Louis
16h 45m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Aug 26
BRU10:00 amBrussels Bruxelles-National
36h 44m
2 stops
STL3:44 pmLambert-St Louis
$632
Find similar

United Airlines flights from Illinois to Brussels

Our best United Airlines deals on Illinois to Brussels flight tickets
United Airlines
Nov 19
STL11:49 amLambert-St Louis
13h 16m
1 stop
BRU8:05 amBrussels Bruxelles-National
Nov 26
BRU10:00 amBrussels Bruxelles-National
14h 39m
2 stops
STL5:39 pmLambert-St Louis
$606
Find similar
United Airlines
Nov 7
STL12:31 pmLambert-St Louis
13h 24m
1 stop
BRU8:55 amBrussels Bruxelles-National
Nov 13
BRU10:00 amBrussels Bruxelles-National
35h 25m
2 stops
STL2:25 pmLambert-St Louis
$633
Find similar
United Airlines
Nov 7
STL1:10 pmLambert-St Louis
11h 05m
1 stop
BRU7:15 amBrussels Bruxelles-National
Nov 14
BRU10:10 amBrussels Bruxelles-National
16h 29m
1 stop
STL7:39 pmLambert-St Louis
$656
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 August 6, 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

Fri 11/28

7:20 pm-11:55 am

2 stops33h 35m

Brussels Bruxelles-National

Mon 12/8

10:20 am-4:45 pm

1 stop13h 25m

$440

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Fri 11/28

7:20 pm-11:55 am

2 stops33h 35m

Brussels Bruxelles-National

Sun 12/7

8:30 pm-4:45 pm

1 stop27h 15m

$441

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 10/14

9:15 am-9:00 pm

2 stops28h 45m

Brussels Bruxelles-National

Mon 10/20

10:25 pm-7:38 pm

2 stops28h 13m

$576

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

7:00 am-8:05 am

1 stop18h 05m

Brussels Bruxelles-National

Thu 11/27

10:00 am-2:25 pm

2 stops35h 25m

$583

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/19

4:05 pm-1:15 pm

2 stops38h 10m

Brussels Bruxelles-National

Wed 11/26

10:00 am-12:28 pm

2 stops33h 28m

$588

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/19

11:49 am-8:05 am

1 stop13h 16m

Brussels Bruxelles-National

Wed 11/26

10:00 am-5:39 pm

2 stops14h 39m

$606

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 11/7

12:31 pm-8:55 am

1 stop13h 24m

Brussels Bruxelles-National

Thu 11/13

10:00 am-2:25 pm

2 stops35h 25m

$633

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 11/7

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Fri 11/14

10:00 am-5:39 pm

2 stops38h 39m

$638

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 11/14

3:23 pm-3:25 pm

2 stops17h 02m

Brussels Bruxelles-National

Mon 11/24

8:45 pm-4:40 pm

2 stops26h 55m

$681

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 10/14

5:09 pm-5:45 pm

2 stops17h 36m

Brussels Bruxelles-National

Mon 10/20

9:15 pm-4:04 pm

2 stops25h 49m

$699

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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, 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 $566. If you are unable to visit Brussels during the month of October, then departing from Illinois during the month April is also very affordable. Most momondo users find prices during this month for around $576.

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 $1,106. 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 $1,303.

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 $1,174.

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 $789 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 $597 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

Best Price Found

$284

Fastest flight time

8h 00m

Direct flights

Every day

Airports in Brussels

2 airports
The best one-way flight to Brussels from Illinois in the past 72 hours is $284. The best round-trip flight deal from Illinois to Brussels found on momondo in the last 72 hours is $440.
The fastest flight from Illinois to Brussels takes 8h 00m
Direct flights go from Illinois to Brussels every day.
There are 2 airports near Brussels: Brussels Bruxelles-National (BRU), Charleroi Brussels (CRL)
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 $313Free CancellationRating
7.4
1,463 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom $405Free CancellationRating
7.0
524 reviews
Search Icelandair flights
Turkish AirlinesPriceFrom $492Free CancellationRating
7.3
3,932 reviews
Search Turkish Airlines flights
KLMPriceFrom $506Free CancellationRating
7.8
1,381 reviews
Search KLM flights
Aer LingusPriceFrom $536Free CancellationRating
7.1
1,201 reviews
Search Aer Lingus flights
TAP AIR PORTUGALPriceFrom $542Free CancellationRating
7.1
1,942 reviews
Search TAP AIR PORTUGAL flights
United AirlinesPriceFrom $590Free CancellationRating
7.4
8,917 reviews
Search United Airlines flights
LufthansaPriceFrom $728Free CancellationRating
6.8
7,289 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.

An easier way to manage your Brussels trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Mon 8/11
Mon 8/18
By creating a price alert you accept our terms of use and privacy policy.

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