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Cheap flights from Brussels Bruxelles-National Airport to Illinois from $380

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Brussels Bruxelles-National Airport to Illinois departing on 9/24. 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 Brussels Bruxelles-National Airport to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
6:20 am - 1:25 pm
BRU
-
STL
14h 05m
1 stop
Lufthansa Logo
3:30 pm - 11:50 am
STL
-
BRU
13h 20m
1 stop
$745Lufthansa
Mon, Aug 24 - Sun, Aug 30
Multiple Airlines Logo
6:20 am - 3:38 pm
BRU
-
STL
16h 18m
2 stops
Multiple Airlines Logo
12:59 pm - 9:00 am
STL
-
BRU
13h 01m
1 stop
$760Multiple Airlines
Fri, Aug 14 - Tue, Aug 18
Lufthansa Logo
10:30 am - 10:59 pm
BRU
-
STL
19h 29m
2 stops
Lufthansa Logo
12:27 pm - 7:45 am
STL
-
BRU
12h 18m
1 stop
$761Lufthansa
Fri, Aug 14 - Tue, Aug 18
Multiple Airlines Logo
6:20 am - 3:38 pm
BRU
-
STL
16h 18m
2 stops
Multiple Airlines Logo
2:40 pm - 1:15 pm
STL
-
BRU
15h 35m
2 stops
$763Multiple Airlines
Fri, Aug 14 - Tue, Aug 18
United Airlines Logo
9:10 am - 12:03 pm
BRU
-
STL
33h 53m
2 stops
United Airlines Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
$771United Airlines
Fri, Sep 18 - Mon, Sep 21
Delta Logo
8:05 am - 2:15 pm
BRU
-
ORD
13h 10m
1 stop
Delta Logo
1:55 pm - 2:40 pm
ORD
-
BRU
17h 45m
2 stops
$791Delta
Tue, Sep 1 - Sun, Sep 13
Delta Logo
8:05 am - 2:15 pm
BRU
-
ORD
13h 10m
1 stop
Delta Logo
1:55 pm - 2:40 pm
ORD
-
BRU
17h 45m
2 stops
$792Delta
Tue, Sep 1 - Sun, Sep 13
Scandinavian Airlines Logo
5:45 am - 4:10 pm
BRU
-
ORD
17h 25m
1 stop
Scandinavian Airlines Logo
8:15 pm - 7:50 pm
ORD
-
BRU
17h 35m
1 stop
$797Scandinavian Airlines
Fri, Oct 23 - Sun, Oct 25
Air Canada Logo
9:30 am - 7:52 pm
BRU
-
ORD
17h 22m
2 stops
Air Canada Logo
7:09 am - 7:10 am
ORD
-
BRU
17h 01m
2 stops
$799Air Canada
Wed, Jul 22 - Sat, Sep 5
Air Canada Logo
6:20 am - 4:57 pm
BRU
-
ORD
17h 37m
2 stops
Air Canada Logo
11:05 am - 11:50 am
ORD
-
BRU
17h 45m
2 stops
$800Air Canada
Wed, Jul 29 - Sun, Aug 9

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Delta flights from Brussels Bruxelles-National Airport to Illinois

Our best Delta deals on Brussels Bruxelles-National Airport to Illinois flight tickets
Delta
Sep 1
BRU8:05 amBrussels Bruxelles-National
13h 10m
1 stop
ORD2:15 pmChicago O'Hare Intl
Sep 13
ORD1:55 pmChicago O'Hare Intl
17h 45m
2 stops
BRU2:40 pmBrussels Bruxelles-National
$791
Delta
Sep 1
BRU8:05 amBrussels Bruxelles-National
13h 10m
1 stop
ORD2:15 pmChicago O'Hare Intl
Sep 13
ORD1:55 pmChicago O'Hare Intl
17h 45m
2 stops
BRU2:40 pmBrussels Bruxelles-National
$792
Delta
Sep 2
BRU6:20 amBrussels Bruxelles-National
18h 41m
2 stops
MDW6:01 pmChicago Midway
Sep 11
MDW11:35 amChicago Midway
13h 05m
1 stop
BRU7:40 amBrussels Bruxelles-National
$793

United Airlines flights from Brussels Bruxelles-National Airport to Illinois

Our best United Airlines deals on Brussels Bruxelles-National Airport to Illinois flight tickets
United Airlines
Sep 18
BRU9:10 amBrussels Bruxelles-National
33h 53m
2 stops
STL12:03 pmLambert-St Louis
Sep 21
STL12:10 pmLambert-St Louis
12h 00m
1 stop
BRU7:10 amBrussels Bruxelles-National
$771
United Airlines
Nov 12
BRU8:25 amBrussels Bruxelles-National
18h 15m
2 stops
STL7:40 pmLambert-St Louis
Nov 16
STL11:25 amLambert-St Louis
13h 40m
2 stops
BRU8:05 amBrussels Bruxelles-National
$775
United Airlines
Nov 12
BRU7:00 amBrussels Bruxelles-National
19h 15m
2 stops
STL7:15 pmLambert-St Louis
Nov 16
STL1:24 pmLambert-St Louis
10h 51m
1 stop
BRU7:15 amBrussels Bruxelles-National
$776

momondo Fare Finder

 
Customize your flight search to find flights from Brussels Bruxelles-National Airport to Illinois 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 July 1, 2026.
Use the filters below to find and compare flights from Brussels Bruxelles-National Airport to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest 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

3:30 pm-11:50 am

1 stop13h 20m

$745

BrusselsSt. Louis

BRU - STL

BRUSTL

Brussels Bruxelles-National

Fri 8/14

6:20 am-3:38 pm

2 stops16h 18m

Lambert-St Louis

Tue 8/18

12:59 pm-9:00 am

1 stop13h 01m

$760

BrusselsSt. Louis

BRU - STL

BRUSTL

Brussels Bruxelles-National

Fri 8/14

10:30 am-10:59 pm

2 stops19h 29m

Lambert-St Louis

Tue 8/18

12:27 pm-7:45 am

1 stop12h 18m

$761

BrusselsSt. Louis

BRU - STL

BRUSTL

Brussels Bruxelles-National

Fri 8/14

6:20 am-3:38 pm

2 stops16h 18m

Lambert-St Louis

Tue 8/18

2:40 pm-1:15 pm

2 stops15h 35m

$763

BrusselsSt. Louis

BRU - STL

BRUSTL

Brussels Bruxelles-National

Fri 9/18

9:10 am-12:03 pm

2 stops33h 53m

Lambert-St Louis

Mon 9/21

12:10 pm-7:10 am

1 stop12h 00m

$771

BrusselsChicago

BRU - ORD

BRUORD

Brussels Bruxelles-National

Tue 9/1

8:05 am-2:15 pm

1 stop13h 10m

Chicago O'Hare Intl

Sun 9/13

1:55 pm-2:40 pm

2 stops17h 45m

$791

BrusselsChicago

BRU - ORD

BRUORD

Brussels Bruxelles-National

Tue 9/1

8:05 am-2:15 pm

1 stop13h 10m

Chicago O'Hare Intl

Sun 9/13

1:55 pm-2:40 pm

2 stops17h 45m

$792

BrusselsChicago

BRU - ORD

BRUORD

Brussels Bruxelles-National

Fri 10/23

5:45 am-4:10 pm

1 stop17h 25m

Chicago O'Hare Intl

Sun 10/25

8:15 pm-7:50 pm

1 stop17h 35m

$797

BrusselsChicago

BRU - ORD

BRUORD

Brussels Bruxelles-National

Wed 7/22

9:30 am-7:52 pm

2 stops17h 22m

Chicago O'Hare Intl

Sat 9/5

7:09 am-7:10 am

2 stops17h 01m

$799

BrusselsChicago

BRU - ORD

BRUORD

Brussels Bruxelles-National

Wed 7/29

6:20 am-4:57 pm

2 stops17h 37m

Chicago O'Hare Intl

Sun 8/9

11:05 am-11:50 am

2 stops17h 45m

$800

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 Illinois from

How to get the cheapest flight ticket from Brussels Bruxelles-National Airport 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

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Brussels Bruxelles-National Airport is in August. Flight prices, which tend to average around $374, 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 August, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $409.

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

The cheapest day to depart from Brussels Bruxelles-National Airport to Illinois is on a Monday when prices can be found for as low as $830. Flights from Brussels Bruxelles-National Airport to Illinois on a Saturday will generally be more expensive and average around $1,021. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest Brussels Bruxelles-National to Illinois flight route?

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

How far in advance should I book a flight from Brussels Bruxelles-National Airport to Illinois?

You are more likely to see cheaper flights to Illinois from Brussels Bruxelles-National Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $774 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Brussels Bruxelles-National Airport for as low as $631 on momondo.

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

There are 3 cabin classes available to choose from on Brussels Bruxelles-National Airport to Illinois 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 Brussels Bruxelles-National Airport to Illinois flights?

You could potentially save up to 6% on your flight if you consider stops on a Brussels Bruxelles-National Airport to Illinois flight.

Cheap Brussels Bruxelles-National Airport to Illinois flight deals and tips

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

Best Price Found

$876

Fastest flight time

8h 45m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Brussels Bruxelles-National Airport in the past 72 hours is $876. The best round-trip flight deal from Brussels Bruxelles-National Airport to Illinois found on momondo in the last 72 hours is $833.
The fastest flight from Brussels Bruxelles-National Airport to Illinois takes 8h 45m
Direct flights go from Brussels Bruxelles-National Airport to Illinois every day.
There are 98 airports in Illinois. From Brussels Bruxelles-National Airport there are direct flights to Chicago O'Hare Intl (ORD).
Search flight deals

Frequently asked questions about flying from Brussels Bruxelles-National Airport to Illinois

  • When did momondo last update prices for flights from Brussels Bruxelles-National Airport to Illinois?

    Prices for flights from Brussels Bruxelles-National Airport to Illinois are updated daily.

  • How many operators does momondo search for flights from Brussels Bruxelles-National Airport to Illinois?

  • How old do you have to be to fly from Brussels Bruxelles-National Airport to Illinois?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Brussels Bruxelles-National Airport to Illinois.

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

    The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Brussels Bruxelles-National Airport to Illinois?

Best airlines flying from Brussels Bruxelles-National Airport to Illinois

Compare and see reviews for airlines that fly from Brussels Bruxelles-National Airport to Illinois with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom $521Free CancellationRating
6.8
8,111 reviews
Search Lufthansa flights
United AirlinesPriceFrom $609Free CancellationRating
7.4
9,904 reviews
Search United Airlines flights

Why use momondo?

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

It is quick and easy to find Brussels to Illinois flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Illinois that suits you.

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

All flight searches from Brussels to Illinois on momondo can be filtered to show those which offer flexible booking policies.

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

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 Brussels to Illinois.

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

Yes momondo offers price alerts on flights to Illinois from Brussels. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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