What is the cheapest airline that flies from Brussels to Illinois?

Finnair, Iberia, and American Airlines are the most popular carriers operating from Brussels to Illinois

How many flights depart from Brussels to Illinois on average per week?

40 flights are operational weekly from Brussels to Illinois as of August 2026. The most popular departure day for this route is Mon, with 15% of flights per week taking off on this day.

How many flights depart from Brussels to Illinois on average per day?

The number of flights available between Brussels and Illinois is 5 per day as of August 2026. The most frequent departure time is 10:00AM, with 100% of daily flights leaving at noon.

When did momondo last update prices for flights from Brussels to Illinois?

Prices for flights from Brussels to Illinois were last updated today.

How many operators does momondo search for flights from Brussels to Illinois?

As of August 2026, there are 2 operators available to choose from for flights from Brussels to Illinois.

How old do you have to be to fly from Brussels to Illinois?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Brussels to Illinois.

What documentation or ID do you need to fly to Illinois?

The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$361 Cheap Flights from Brussels to Illinois in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Brussels to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:20 am - 1:25 pm

BRU

STL

14h 05m

1 stop

1:00 pm - 7:15 am

STL

BRU

11h 15m

1 stop

$759Multiple Airlines

Mon, Aug 24 - Sun, Aug 30

6:20 am - 1:25 pm

BRU

STL

14h 05m

1 stop

12:59 pm - 9:30 am

STL

BRU

13h 31m

2 stops

$760Multiple Airlines

Mon, Aug 24 - Sun, Aug 30

6:20 am - 3:38 pm

BRU

STL

16h 18m

2 stops

12:59 pm - 9:30 am

STL

BRU

13h 31m

2 stops

$761Multiple Airlines

Mon, Aug 24 - Sun, Aug 30

6:20 am - 1:25 pm

BRU

STL

14h 05m

1 stop

12:27 pm - 7:45 am

STL

BRU

12h 18m

1 stop

$765Lufthansa

Mon, Aug 24 - Sun, Aug 30

6:20 am - 3:38 pm

BRU

STL

16h 18m

2 stops

12:59 pm - 9:00 am

STL

BRU

13h 01m

1 stop

$767Lufthansa

Fri, Aug 28 - Sun, Sep 6

6:20 am - 1:25 pm

BRU

STL

14h 05m

1 stop

12:59 pm - 9:30 am

STL

BRU

13h 31m

2 stops

$767Multiple Airlines

Mon, Aug 24 - Sun, Aug 30

6:20 am - 1:25 pm

BRU

STL

14h 05m

1 stop

12:20 pm - 7:45 am

STL

BRU

12h 25m

1 stop

$769Lufthansa

Tue, Sep 15 - Thu, Sep 24

6:20 am - 1:25 pm

BRU

STL

14h 05m

1 stop

12:59 pm - 9:00 am

STL

BRU

13h 01m

1 stop

$775United Airlines

Mon, Aug 24 - Sun, Aug 30

6:20 am - 1:25 pm

BRU

STL

14h 05m

1 stop

7:00 am - 7:45 am

STL

BRU

17h 45m

1 stop

$787United Airlines

Mon, Aug 24 - Sun, Aug 30

8:25 am - 2:10 pm

BRU

ORD

11h 45m

1 stop

11:56 am - 8:05 am

ORD

BRU

13h 09m

1 stop

$807United Airlines

Thu, Oct 29 - Thu, Nov 19

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TAP AIR PORTUGAL flights from Brussels to Illinois

Our best TAP AIR PORTUGAL deals on Brussels to Illinois flight tickets

TAP AIR PORTUGAL

Dec 17

BRU5:55 pmBrussels Bruxelles-National

28h 35m

1 stop

ORD3:30 pmChicago O'Hare Intl

Dec 30

ORD7:00 pmChicago O'Hare Intl

21h 50m

1 stop

BRU11:50 pmBrussels Bruxelles-National

$775

TAP AIR PORTUGAL

Sep 8

BRU8:55 pmBrussels Bruxelles-National

26h 05m

1 stop

ORD4:00 pmChicago O'Hare Intl

Sep 26

ORD6:05 pmChicago O'Hare Intl

22h 50m

1 stop

BRU11:55 pmBrussels Bruxelles-National

$776

TAP AIR PORTUGAL

Sep 8

BRU8:55 pmBrussels Bruxelles-National

26h 05m

1 stop

ORD4:00 pmChicago O'Hare Intl

Sep 26

ORD6:05 pmChicago O'Hare Intl

14h 00m

1 stop

BRU3:05 pmBrussels Bruxelles-National

$777

United Airlines flights from Brussels to Illinois

Our best United Airlines deals on Brussels to Illinois flight tickets

United Airlines

Aug 24

BRU6:20 amBrussels Bruxelles-National

14h 05m

1 stop

STL1:25 pmLambert-St Louis

Aug 30

STL7:00 amLambert-St Louis

17h 45m

1 stop

BRU7:45 amBrussels Bruxelles-National

$787

United Airlines

Sep 15

BRU6:20 amBrussels Bruxelles-National

17h 46m

2 stops

STL5:06 pmLambert-St Louis

Sep 24

STL3:11 pmLambert-St Louis

15h 04m

2 stops

BRU1:15 pmBrussels Bruxelles-National

$792

United Airlines

Oct 21

BRU8:30 amBrussels Bruxelles-National

11h 55m

1 stop

STL1:25 pmLambert-St Louis

Oct 25

STL5:00 pmLambert-St Louis

14h 15m

2 stops

BRU1:15 pmBrussels Bruxelles-National

$796

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BrusselsSt. Louis

BRU - STL

BRUSTL

Brussels Bruxelles-National

Mon 8/24

6:20 am-1:25 pm

1 stop14h 05m

Lambert-St Louis

Sun 8/30

1:00 pm-7:15 am

1 stop11h 15m

$759

BrusselsSt. Louis

BRU - STL

BRUSTL

Brussels Bruxelles-National

Mon 8/24

6:20 am-1:25 pm

1 stop14h 05m

Lambert-St Louis

Sun 8/30

12:59 pm-9:30 am

2 stops13h 31m

$760

BrusselsSt. Louis

BRU - STL

BRUSTL

Brussels Bruxelles-National

Mon 8/24

6:20 am-3:38 pm

2 stops16h 18m

Lambert-St Louis

Sun 8/30

12:59 pm-9:30 am

2 stops13h 31m

$761

BrusselsSt. Louis

BRU - STL

BRUSTL

Brussels Bruxelles-National

Mon 8/24

6:20 am-1:25 pm

1 stop14h 05m

Lambert-St Louis

Sun 8/30

12:27 pm-7:45 am

1 stop12h 18m

$765

BrusselsSt. Louis

BRU - STL

BRUSTL

Brussels Bruxelles-National

Fri 8/28

6:20 am-3:38 pm

2 stops16h 18m

Lambert-St Louis

Sun 9/6

12:59 pm-9:00 am

1 stop13h 01m

$767

BrusselsSt. Louis

BRU - STL

BRUSTL

Brussels Bruxelles-National

Mon 8/24

6:20 am-1:25 pm

1 stop14h 05m

Lambert-St Louis

Sun 8/30

12:59 pm-9:30 am

2 stops13h 31m

$767

BrusselsSt. Louis

BRU - STL

BRUSTL

Brussels Bruxelles-National

Tue 9/15

6:20 am-1:25 pm

1 stop14h 05m

Lambert-St Louis

Thu 9/24

12:20 pm-7:45 am

1 stop12h 25m

$769

BrusselsSt. Louis

BRU - STL

BRUSTL

Brussels Bruxelles-National

Mon 8/24

6:20 am-1:25 pm

1 stop14h 05m

Lambert-St Louis

Sun 8/30

12:59 pm-9:00 am

1 stop13h 01m

$775

BrusselsSt. Louis

BRU - STL

BRUSTL

Brussels Bruxelles-National

Mon 8/24

6:20 am-1:25 pm

1 stop14h 05m

Lambert-St Louis

Sun 8/30

7:00 am-7:45 am

1 stop17h 45m

$787

Quickest round-trip

BrusselsChicago

BRU - ORD

BRUORD

Brussels Bruxelles-National

Thu 10/29

8:25 am-2:10 pm

1 stop11h 45m

Chicago O'Hare Intl

Thu 11/19

11:56 am-8:05 am

1 stop13h 09m

$807

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Brussels to Illinois

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

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Brussels is in November. Flight prices, which tend to average around $610, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of November, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $647.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Brussels to Illinois is on a Wednesday when prices can be found for as low as $826. Flights from Brussels to Illinois on a Saturday will generally be more expensive and average around $1,016. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest Brussels to Illinois flight route?

Fly from Brussels Bruxelles-National to Chicago O'Hare Intl for the best Brussels - Illinois flight prices

How far in advance should I book a flight from Brussels to Illinois?

You are more likely to see cheaper flights to Illinois from Brussels when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $783 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Brussels for as low as $631 on momondo.

What cabin class options are available on Brussels to Illinois flights?

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

Cheap Brussels to Illinois flight deals and tips

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

Fastest flight time	8h 45m
Direct flights	Every day
Airports in Illinois	98 airports

The fastest flight from Brussels to Illinois takes 8h 45m

Direct flights go from Brussels to Illinois every day.

There are 98 airports in Illinois. From Brussels there are direct flights to Chicago O'Hare Intl (ORD).

Search flight deals

Frequently asked questions about flying from Brussels to Illinois

When did momondo last update prices for flights from Brussels to Illinois?
Prices for flights from Brussels to Illinois were last updated today.
How many operators does momondo search for flights from Brussels to Illinois?
As of August 2026, there are 2 operators available to choose from for flights from Brussels to Illinois.
How old do you have to be to fly from Brussels to Illinois?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Brussels to Illinois.
What documentation or ID do you need to fly to Illinois?
The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Brussels to Illinois

Compare and see reviews for airlines that fly from Brussels to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Lufthansa	PriceFrom $521	Free Cancellation	Rating 6.8 8,174 reviews		Search Lufthansa flights
United Airlines	PriceFrom $609	Free Cancellation	Rating 7.4 10,062 reviews		Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Brussels to Illinois?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Brussels to Illinois. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Brussels to Illinois with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Brussels to Illinois flights to just show those with flexible booking policies.

How can momondo help me find flights from Brussels to Illinois?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Brussels.

I’m not ready to book a flight from Brussels to Illinois right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Brussels to Illinois 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.