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Cheap flights from Illinois to Brussels from $312

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 9/6. 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
1 adult, Economy, 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.
TAP AIR PORTUGAL Logo
6:00 pm - 8:05 pm
ORD
-
BRU
19h 05m
1 stop
TAP AIR PORTUGAL Logo
5:55 am - 4:00 pm
BRU
-
ORD
17h 05m
1 stop
$685TAP AIR PORTUGAL
Fri, Oct 2 - Sun, Oct 11
TAP AIR PORTUGAL Logo
6:00 pm - 11:55 pm
ORD
-
BRU
22h 55m
1 stop
TAP AIR PORTUGAL Logo
3:55 pm - 12:40 pm
BRU
-
ORD
27h 45m
1 stop
$687TAP AIR PORTUGAL
Fri, Oct 9 - Wed, Oct 14
Icelandair Logo
7:25 pm - 12:55 pm
ORD
-
BRU
10h 30m
1 stop
Icelandair Logo
1:50 pm - 6:15 pm
BRU
-
ORD
11h 25m
1 stop
$705Icelandair
Mon, Aug 24 - Thu, Sep 3
Turkish Airlines Logo
11:25 am - 5:50 pm
ORD
-
BRU
23h 25m
1 stop
Turkish Airlines Logo
11:35 am - 11:00 am
BRU
-
ORD
29h 25m
1 stop
$709Turkish Airlines
Tue, Sep 22 - Wed, Oct 28
Turkish Airlines Logo
8:10 pm - 10:10 am
ORD
-
BRU
31h 00m
1 stop
Turkish Airlines Logo
6:30 am - 11:00 am
BRU
-
ORD
35h 30m
1 stop
$711Turkish Airlines
Tue, Oct 13 - Wed, Nov 4
Icelandair Logo
10:25 pm - 12:55 pm
ORD
-
BRU
31h 30m
1 stop
Icelandair Logo
1:50 pm - 9:25 pm
BRU
-
ORD
14h 35m
1 stop
$713Icelandair
Mon, Aug 17 - Mon, Aug 31
United Airlines Logo
8:33 am - 1:15 pm
STL
-
BRU
21h 42m
2 stops
United Airlines Logo
10:10 am - 3:41 pm
BRU
-
STL
12h 31m
1 stop
$747United Airlines
Mon, Nov 16 - Thu, Nov 19
United Airlines Logo
2:00 pm - 8:05 am
STL
-
BRU
11h 05m
1 stop
United Airlines Logo
10:10 am - 6:06 pm
BRU
-
STL
14h 56m
1 stop
$750United Airlines
Mon, Nov 16 - Thu, Nov 19
Air Canada Logo
4:15 pm - 1:15 pm
STL
-
BRU
14h 00m
2 stops
Air Canada Logo
10:00 am - 2:18 pm
BRU
-
STL
35h 18m
2 stops
$758Air Canada
Mon, Nov 16 - Thu, Nov 19
Air Canada Logo
12:10 pm - 1:15 pm
STL
-
BRU
18h 05m
2 stops
Air Canada Logo
10:00 am - 3:30 pm
BRU
-
STL
36h 30m
2 stops
$817Air Canada
Tue, Oct 13 - Tue, Nov 10

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TAP AIR PORTUGAL flights from Illinois to Brussels Bruxelles-National Airport

Our best TAP AIR PORTUGAL deals on Illinois to Brussels Bruxelles-National Airport flight tickets
TAP AIR PORTUGAL
Oct 2
ORD6:00 pmChicago O'Hare Intl
19h 05m
1 stop
BRU8:05 pmBrussels Bruxelles-National
Oct 11
BRU5:55 amBrussels Bruxelles-National
17h 05m
1 stop
ORD4:00 pmChicago O'Hare Intl
$685
TAP AIR PORTUGAL
Oct 9
ORD6:00 pmChicago O'Hare Intl
22h 55m
1 stop
BRU11:55 pmBrussels Bruxelles-National
Oct 14
BRU3:55 pmBrussels Bruxelles-National
27h 45m
1 stop
ORD12:40 pmChicago O'Hare Intl
$687
TAP AIR PORTUGAL
Dec 2
ORD7:00 pmChicago O'Hare Intl
15h 05m
1 stop
BRU5:05 pmBrussels Bruxelles-National
Dec 9
BRU6:00 amBrussels Bruxelles-National
16h 30m
1 stop
ORD3:30 pmChicago O'Hare Intl
$688

KLM flights from Illinois to Brussels Bruxelles-National Airport

Our best KLM deals on Illinois to Brussels Bruxelles-National Airport flight tickets
KLM
Aug 24
MDW12:46 pmChicago Midway
11h 54m
1 stop
BRU7:40 amBrussels Bruxelles-National
Sep 3
BRU9:45 amBrussels Bruxelles-National
13h 30m
1 stop
MDW4:15 pmChicago Midway
$931
KLM
Aug 4
MDW10:54 amChicago Midway
13h 46m
1 stop
BRU7:40 amBrussels Bruxelles-National
Aug 13
BRU9:45 amBrussels Bruxelles-National
13h 30m
1 stop
MDW4:15 pmChicago Midway
$996
KLM
Sep 16
MDW1:00 pmChicago Midway
11h 40m
1 stop
BRU7:40 amBrussels Bruxelles-National
Sep 20
BRU9:45 amBrussels Bruxelles-National
19h 40m
1 stop
MDW10:25 pmChicago Midway
$1,076

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 June 19, 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

Fri 10/2

6:00 pm-8:05 pm

1 stop19h 05m

Brussels Bruxelles-National

Sun 10/11

5:55 am-4:00 pm

1 stop17h 05m

$685

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Fri 10/9

6:00 pm-11:55 pm

1 stop22h 55m

Brussels Bruxelles-National

Wed 10/14

3:55 pm-12:40 pm

1 stop27h 45m

$687
Quickest round-trip

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Mon 8/24

7:25 pm-12:55 pm

1 stop10h 30m

Brussels Bruxelles-National

Thu 9/3

1:50 pm-6:15 pm

1 stop11h 25m

$705

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Tue 9/22

11:25 am-5:50 pm

1 stop23h 25m

Brussels Bruxelles-National

Wed 10/28

11:35 am-11:00 am

1 stop29h 25m

$709

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Tue 10/13

8:10 pm-10:10 am

1 stop31h 00m

Brussels Bruxelles-National

Wed 11/4

6:30 am-11:00 am

1 stop35h 30m

$711

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Mon 8/17

10:25 pm-12:55 pm

1 stop31h 30m

Brussels Bruxelles-National

Mon 8/31

1:50 pm-9:25 pm

1 stop14h 35m

$713

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 11/16

8:33 am-1:15 pm

2 stops21h 42m

Brussels Bruxelles-National

Thu 11/19

10:10 am-3:41 pm

1 stop12h 31m

$747

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 11/16

2:00 pm-8:05 am

1 stop11h 05m

Brussels Bruxelles-National

Thu 11/19

10:10 am-6:06 pm

1 stop14h 56m

$750

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 11/16

4:15 pm-1:15 pm

2 stops14h 00m

Brussels Bruxelles-National

Thu 11/19

10:00 am-2:18 pm

2 stops35h 18m

$758

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 10/13

12:10 pm-1:15 pm

2 stops18h 05m

Brussels Bruxelles-National

Tue 11/10

10:00 am-3:30 pm

2 stops36h 30m

$817

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 January instead. Flights to Brussels Bruxelles-National Airport in January, while not as cheap as those in May, still average around $377.

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 $1,071. 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 $1,393.

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 $917 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 $572 on momondo.

What cabin class options are available on Illinois to Brussels Bruxelles-National Airport flights?

There are 3 cabin classes available to choose from on Illinois to Brussels Bruxelles-National Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

You could potentially save up to 60% 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

$829

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 $829. 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
IcelandairPriceFrom $418Free CancellationRating
7.0
679 reviews
Search Icelandair flights
TAP AIR PORTUGALPriceFrom $444Free CancellationRating
7.2
2,286 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom $448Free CancellationRating
7.4
1,840 reviews
Search Scandinavian Airlines flights
Aer LingusPriceFrom $531Free CancellationRating
7.3
1,607 reviews
Search Aer Lingus flights
Turkish AirlinesPriceFrom $582Free CancellationRating
7.4
4,410 reviews
Search Turkish Airlines flights
United AirlinesPriceFrom $692Free CancellationRating
7.4
9,867 reviews
Search United Airlines flights
Brussels AirlinesPriceFrom $752Free CancellationRating
7.2
412 reviews
Search Brussels Airlines flights
LufthansaPriceFrom $969Free CancellationRating
6.8
8,082 reviews
Search Lufthansa flights

Traveling to a place near Brussels?

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