In terms of precipitation, rainfall in Brussels Bruxelles-National Airport ranges from 1.6 - 3.1 inches per month. January is typically the wettest month, when rainfall can reach 3.1 in. August is typically the driest time to visit Brussels Bruxelles-National Airport when rainfall is around 1.6 in.

If weather is an important factor for your trip to Brussels Bruxelles-National Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 37.4 F).

What are the most popular routes from Illinois to Brussels Bruxelles-National Airport?

The most popular route from Illinois to Brussels Bruxelles-National Airport is Chicago O'Hare Intl - Brussels Bruxelles-National. You may also consider Chicago Midway - Brussels Bruxelles-National or Lambert-St Louis - Brussels Bruxelles-National.

What are the cheapest flights from Illinois to Brussels Bruxelles-National Airport?

While on average a flight from Illinois to Brussels Bruxelles-National Airport is generally $2,460, our data shows the cheapest flight currently is $536. When looking at the most popular route, (Chicago O'Hare Intl - Brussels Bruxelles-National), you can expect to pay $427 for that flight.

What are the most reliable airlines from Illinois to Brussels Bruxelles-National Airport?

No one likes to see their flight delayed. When booking a flight from Illinois to Brussels Bruxelles-National Airport consider choosing Air Canada (38%), Austrian Airlines (38%) or Brussels Airlines (38%) as they are the most reliable in getting you off to your destination on time.

What are the most popular airlines that fly from Illinois to Brussels Bruxelles-National Airport?

Before booking your flight from Illinois to Brussels Bruxelles-National Airport check out the most popular airlines for this route: Aer Lingus, Icelandair or KLM.

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

To save up to 52% on this flight, we recommend booking at least 39 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Illinois to Brussels Bruxelles-National Airport from $651 1-2 weeks out and tickets from $651 for flights departing within the next 72 hours.

What is the cheapest month to fly from Illinois to Brussels Bruxelles-National Airport?

Our data shows that October tends to be the cheapest month to fly to Brussels Bruxelles-National Airport from Illinois. Users have commonly found prices around $797 for the month, but tickets can be as low as $379. Due to multiple factors, prepare for potentially higher prices in June.

Can I find deals for flights from Illinois to Bruxelles-National that include hotel bookings?

Yes. In addition to deals on Illinois to Bruxelles-National flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Illinois to Bruxelles-National?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Bruxelles-National.

Can I find deals for business class flights from Illinois to Bruxelles-National?

Yes. Cheapflights offers flight deals from Illinois to Bruxelles-National by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$246+ Cheap Flights from Illinois to Brussels Bruxelles-National Airport

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Cheap flight deals from Illinois to Bruxelles-National

Round-trip from	$427 (oojo)
One-way from	$246 (Kiwi.com)
Popular in	June
Cheapest in	October
Average price	$670
Good round-trip deal	$841 or less
Good one-way deal	$664 or less

From Illinois to Brussels Bruxelles-National

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One-way flight from Illinois to Brussels Bruxelles-National

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Highest demand for flights based on searches. 26% potential increase in price ($281 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).

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Average for round-trip flights in August 2025

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Price to beat on a round-trip flight from Illinois to Brussels Bruxelles-National.

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Price to beat on a one-way flight from Illinois to Brussels Bruxelles-National.

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Find flight deals from Illinois to Bruxelles-National

Cheapest flights from Illinois to Bruxelles-National
Explore the most affordable flight options available from Illinois to Bruxelles-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

Mon 11/37:20 pmORD - BRU

2 stops32h 30mScandinavian Airlines

Tue 11/1111:30 amBRU - ORD

2 stops36h 15mScandinavian Airlines

Deal found 8/16

$427

Mon 12/17:20 pmORD - BRU

2 stops32h 30mScandinavian Airlines

Wed 12/1011:30 amBRU - ORD

2 stops36h 15mScandinavian Airlines

Deal found 8/17

$429

Fri 11/287:20 pmORD - BRU

2 stops33h 35mScandinavian Airlines

Sun 12/77:45 pmBRU - ORD

2 stops28h 00mScandinavian Airlines

Deal found 8/17

$432

Wed 11/57:20 pmORD - BRU

1 stop12h 10mScandinavian Airlines

Tue 11/118:30 pmBRU - ORD

1 stop27h 15mScandinavian Airlines

Deal found 8/15

$436

Sun 12/147:20 pmORD - BRU

2 stops32h 30mScandinavian Airlines

Sun 12/288:30 pmBRU - ORD

1 stop27h 15mScandinavian Airlines

Deal found 8/17

$445

Sun 10/127:15 pmORD - BRU

2 stops18h 20mScandinavian Airlines

Sun 10/199:20 pmBRU - ORD

2 stops25h 50mScandinavian Airlines

Deal found 8/16

$446

Mon 11/37:20 pmORD - BRU

1 stop17h 30mScandinavian Airlines

Wed 11/1210:20 amBRU - ORD

1 stop13h 25mScandinavian Airlines

Deal found 8/15

$447

Wed 11/128:25 amSTL - BRU

1 stop15h 50mUnited Airlines

Thu 11/2710:00 amBRU - STL

2 stops40h 39mUnited Airlines

Deal found 8/16

$583

Mon 8/1811:02 amSTL - BRU

2 stops14h 38mVirgin Atlantic

Tue 8/2610:45 amBRU - STL

2 stops18h 17mVirgin Atlantic

Deal found 8/17

$626

Sun 11/96:43 pmSTL - BRU

1 stop31h 12mMultiple Airlines

Sun 11/1610:00 amBRU - STL

2 stops36h 29mMultiple Airlines

Deal found 8/17

$641

Mon 8/186:00 amSTL - BRU

1 stop18h 00mUnited Airlines

Tue 8/2610:00 amBRU - STL

1 stop17h 00mUnited Airlines

Deal found 8/17

$644

Sun 11/95:24 pmSTL - BRU

2 stops31h 26mAir Canada

Sun 11/1610:00 amBRU - STL

2 stops14h 39mAir Canada

Deal found 8/17

$647

Best flights from Illinois to Bruxelles-National
Discover carefully curated flight deals from Illinois to Bruxelles-National that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 18, 2025.

Wed 1/287:20 pmORD - BRU

2 stops32h 30mScandinavian Airlines

Fri 2/67:20 pmBRU - ORD

2 stops28h 25mScandinavian Airlines

Deal found 8/16

$432

Wed 11/126:30 amSTL - BRU

2 stops18h 20mAir Canada

Thu 11/2710:00 amBRU - STL

2 stops35h 25mAir Canada

Deal found 8/16

$583

Wed 11/128:25 amSTL - BRU

1 stop15h 50mUnited Airlines

Thu 11/2710:00 amBRU - STL

2 stops40h 39mUnited Airlines

Deal found 8/16

$583

Sun 11/96:43 pmSTL - BRU

1 stop31h 12mMultiple Airlines

Sun 11/1610:00 amBRU - STL

2 stops36h 29mMultiple Airlines

Deal found 8/17

$641

Wed 11/510:40 amMDW - BRU

2 stops15h 20mDelta

Tue 11/1111:00 amBRU - MDW

2 stops17h 44mDelta

Deal found 8/15

$712

Wed 11/51:08 pmMDW - BRU

2 stops12h 52mVirgin Atlantic

Tue 11/1111:00 amBRU - MDW

2 stops17h 44mVirgin Atlantic

Deal found 8/15

$712

Sun 12/147:20 pmORD - BRU

2 stops32h 30mScandinavian Airlines

Sun 12/288:30 pmBRU - ORD

1 stop27h 15mScandinavian Airlines

Deal found 8/16

$447

Mon 11/37:20 pmORD - BRU

1 stop12h 10mScandinavian Airlines

Mon 11/1010:20 amBRU - ORD

1 stop13h 25mScandinavian Airlines

Deal found 8/15

$447

Thu 12/47:20 pmORD - BRU

2 stops16h 20mScandinavian Airlines

Sat 12/1310:20 amBRU - ORD

1 stop13h 25mScandinavian Airlines

Deal found 8/17

$459

Mon 10/67:15 pmORD - BRU

1 stop13h 05mScandinavian Airlines

Fri 10/177:00 pmBRU - ORD

2 stops28h 10mScandinavian Airlines

Deal found 8/17

$462

Sun 11/95:24 pmSTL - BRU

2 stops31h 26mAir Canada

Sun 11/1610:00 amBRU - STL

2 stops14h 39mAir Canada

Deal found 8/17

$647

Sun 11/912:31 pmSTL - BRU

1 stop13h 24mUnited Airlines

Sun 11/1610:10 amBRU - STL

1 stop12h 36mUnited Airlines

Deal found 8/17

$656

Last-minute flights from Illinois to Bruxelles-National
Discover last-minute flight deals from Illinois to Bruxelles-National. Data last updated August 18, 2025 and is based on user searches.

Mon 8/1811:02 amSTL - BRU

2 stops14h 38mVirgin Atlantic

Tue 8/2610:45 amBRU - STL

2 stops18h 17mVirgin Atlantic

Deal found 8/17

$626

Mon 8/186:00 amSTL - BRU

1 stop18h 00mUnited Airlines

Tue 8/2610:00 amBRU - STL

1 stop17h 00mUnited Airlines

Deal found 8/17

$644

Mon 8/1811:02 amSTL - BRU

2 stops14h 38mMultiple Airlines

Tue 8/2610:45 amBRU - STL

2 stops18h 17mMultiple Airlines

Deal found 8/17

$655

Fri 8/227:50 pmORD - BRU

1 stop18h 30mTurkish Airlines

Tue 9/26:50 pmBRU - ORD

1 stop30h 05mTurkish Airlines

Deal found 8/16

$2,887

Fri 8/223:00 pmORD - BRU

1 stop12h 40mITA Airways

Tue 9/28:15 pmBRU - ORD

2 stops23h 55mITA Airways

Deal found 8/16

$3,105

Fri 8/226:15 amORD - BRU

2 stops24h 25mMultiple Airlines

Tue 9/28:30 amBRU - ORD

2 stops20h 58mMultiple Airlines

Deal found 8/16

$3,876

Fri 8/225:55 pmORD - BRU

Nonstop8h 05mBrussels Airlines

Tue 9/210:15 amBRU - ORD

Nonstop8h 50mBrussels Airlines

Deal found 8/16

$8,775

Sat 8/238:15 amSTL - BRU

2 stops16h 30mUnited Airlines

Fri 8/291:45 pmBRU - STL

2 stops33h 55mUnited Airlines

Deal found 8/17

$1,169

Sat 8/236:00 amSTL - BRU

1 stop18h 00mMultiple Airlines

Fri 8/297:30 pmBRU - STL

2 stops30h 29mMultiple Airlines

Deal found 8/17

$1,263

Sat 8/231:30 pmSTL - BRU

1 stop11h 30mAir Canada

Fri 8/2910:00 amBRU - STL

1 stop17h 00mAir Canada

Deal found 8/17

$2,212

Wed 8/279:40 pmORD - BRU

1 stop28h 45mLOT

Mon 9/11:25 pmBRU - ORD

1 stop13h 15mLOT

Deal found 8/16

$872

Wed 8/2711:45 pmORD - BRU

2 stops25h 45mMultiple Airlines

Mon 9/19:30 amBRU - ORD

1 stop16h 30mMultiple Airlines

Deal found 8/16

$937

One-way flights from Illinois to Bruxelles-National
Search for one-way flight options from Illinois to Bruxelles-National. Find affordable one-way fares based on user searches. Data last updated August 18, 2025.

Sun 10/126:00 pmORD - BRU

2 stops32h 15mMultiple Airlines

Deal found 8/17

$246

Wed 11/57:10 pmORD - BRU

2 stops19h 05mMultiple Airlines

Deal found 8/16

$250

Sat 10/46:15 pmORD - BRU

2 stops31h 45mMultiple Airlines

Deal found 8/17

$263

Wed 10/111:13 amORD - BRU

3 stops26h 52mMultiple Airlines

Deal found 8/16

$277

Mon 9/155:10 amORD - BRU

3 stops44h 30mMultiple Airlines

Deal found 8/16

$279

Sun 10/129:35 amMDW - BRU

2 stops25h 30mMultiple Airlines

Deal found 8/17

$287

Fri 10/319:15 pmORD - BRU

3 stops29h 30mMultiple Airlines

Deal found 8/16

$294

Sun 9/148:49 pmORD - BRU

3 stops52h 51mMultiple Airlines

Deal found 8/16

$295

Sun 9/146:21 amMDW - BRU

3 stops54h 59mMultiple Airlines

Deal found 8/16

$337

Mon 9/156:20 amMDW - BRU

3 stops21h 40mMultiple Airlines

Deal found 8/16

$481

Sun 9/1410:35 amMDW - BRU

2 stops15h 05mVirgin Atlantic

Deal found 8/17

$519

Mon 9/1510:35 amMDW - BRU

2 stops15h 05mVirgin Atlantic

Deal found 8/16

$583

Cheapflights Fare Finder

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

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Wed 1/28

7:20 pm-10:50 am

2 stops32h 30m

Brussels Bruxelles-National

Fri 2/6

7:20 pm-4:45 pm

2 stops28h 25m

$432

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Sun 12/14

7:20 pm-10:50 am

2 stops32h 30m

Brussels Bruxelles-National

Sun 12/28

8:30 pm-4:45 pm

1 stop27h 15m

$447

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Mon 11/3

7:20 pm-2:30 pm

1 stop12h 10m

Brussels Bruxelles-National

Mon 11/10

10:20 am-4:45 pm

1 stop13h 25m

$447

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Thu 12/4

7:20 pm-6:40 pm

2 stops16h 20m

Brussels Bruxelles-National

Sat 12/13

10:20 am-4:45 pm

1 stop13h 25m

$459

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Mon 10/6

7:15 pm-3:20 pm

1 stop13h 05m

Brussels Bruxelles-National

Fri 10/17

7:00 pm-4:10 pm

2 stops28h 10m

$462

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Thu 11/6

7:20 pm-2:30 pm

1 stop12h 10m

Brussels Bruxelles-National

Wed 11/12

10:20 am-4:45 pm

1 stop13h 25m

$470

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Wed 11/5

7:20 pm-7:50 pm

1 stop17h 30m

Brussels Bruxelles-National

Sun 11/9

3:10 pm-4:45 pm

1 stop32h 35m

$470

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

6:30 am-7:50 am

2 stops18h 20m

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 11/12

8:25 am-7:15 am

1 stop15h 50m

Brussels Bruxelles-National

Thu 11/27

10:00 am-7:39 pm

2 stops40h 39m

$583

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 11/9

6:43 pm-8:55 am

1 stop31h 12m

Brussels Bruxelles-National

Sun 11/16

10:00 am-3:29 pm

2 stops36h 29m

$641

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/17

Showing 1-10 of 45 results

...

Best time to book a flight from Illinois to Bruxelles-National

Have a flexible travel schedule? Discover the best time to fly to Bruxelles-National from Illinois with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Brussels Bruxelles-National Airport

What is the cheapest month to book a flight from Illinois to Brussels Bruxelles-National Airport?

Currently, November is the cheapest month in which you can book a flight from Illinois to Brussels Bruxelles-National Airport (average of $614). Flying from Illinois to Brussels Bruxelles-National Airport in June is currently the most expensive (average of $1,079). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to BRU?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Brussels Bruxelles-National Airport as you normally would.

Weekly flight availability from Illinois to Brussels Bruxelles-National Airport

The most flights from USIL to BRU are scheduled on a Monday (5 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 on average).

Related info for your journey

What are the most popular routes from Illinois to Brussels Bruxelles-National Airport?
The most popular route from Illinois to Brussels Bruxelles-National Airport is Chicago O'Hare Intl - Brussels Bruxelles-National. You may also consider Chicago Midway - Brussels Bruxelles-National or Lambert-St Louis - Brussels Bruxelles-National.
What are the most reliable airlines from Illinois to Brussels Bruxelles-National Airport?
No one likes to see their flight delayed. When booking a flight from Illinois to Brussels Bruxelles-National Airport consider choosing Air Canada (38%), Austrian Airlines (38%) or Brussels Airlines (38%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from Illinois to Brussels Bruxelles-National Airport?
While on average a flight from Illinois to Brussels Bruxelles-National Airport is generally $2,460, our data shows the cheapest flight currently is $536. When looking at the most popular route, (Chicago O'Hare Intl - Brussels Bruxelles-National), you can expect to pay $427 for that flight.
Can I find deals for flights from Illinois to Bruxelles-National that include hotel bookings?
Yes. In addition to deals on Illinois to Bruxelles-National flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Illinois to Bruxelles-National?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Bruxelles-National.
Can I find deals for business class flights from Illinois to Bruxelles-National?
Yes. Cheapflights offers flight deals from Illinois to Bruxelles-National by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Illinois to Brussels Bruxelles-National Airport?
Currently, November is the cheapest month in which you can book a flight from Illinois to Brussels Bruxelles-National Airport (average of $614). Flying from Illinois to Brussels Bruxelles-National Airport in June is currently the most expensive (average of $1,079). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Charleroi

Mons

Mechelen

Zaventem

Spa

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Top 8 airlines flying from Illinois to Bruxelles-National

Airline	Cheapest	Average	Flexibility	On-time
Scandinavian Airlines	Cheapest$313	Average$497	FlexibilityNo cancel fee	On-time77%
Icelandair	Cheapest$405	Average$529	FlexibilityNo cancel fee	On-time76%
Turkish Airlines	Cheapest$492	Average$811	FlexibilityNo cancel fee	On-time77%
KLM	Cheapest$506	Average$828	FlexibilityNo cancel fee	On-time75%
Aer Lingus	Cheapest$536	Average$769	FlexibilityNo cancel fee	On-timeN/A
TAP AIR PORTUGAL	Cheapest$542	Average$890	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$590	Average$1,113	FlexibilityNo cancel fee	On-time69%
Lufthansa	Cheapest$728	Average$1,065	FlexibilityNo cancel fee	On-time76%

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$246+ Cheap flights from Illinois to Bruxelles-National (BRU)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/12. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Illinois to Bruxelles-National with Cheapflights

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3. Compare prices and book

Cheap flight deals from Illinois to Bruxelles-National

Keep the following information in mind while searching for Illinois to Bruxelles-National flight deals. Data was last updated August 18, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Illinois to Bruxelles-National

Cheapest flights from Illinois to Bruxelles-NationalExplore the most affordable flight options available from Illinois to Bruxelles-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

Explore the most affordable flight options available from Illinois to Bruxelles-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to Brussels Bruxelles-National Airport that are best for you.

Best time to book a flight from Illinois to Bruxelles-National

Have a flexible travel schedule? Discover the best time to fly to Bruxelles-National from Illinois with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Brussels Bruxelles-National Airport

What is the cheapest month to book a flight from Illinois to Brussels Bruxelles-National Airport?

What is the cheapest time of day to fly from IL to BRU?

Find hourly flight availability from Illinois to Bruxelles-National. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 18, 2025.

Weekly flight availability from Illinois to Brussels Bruxelles-National Airport

Related info for your journey

Find useful and relevant information for your journey from Illinois to Bruxelles-National. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the most popular routes from Illinois to Brussels Bruxelles-National Airport?

What are the most reliable airlines from Illinois to Brussels Bruxelles-National Airport?

What are the cheapest flights from Illinois to Brussels Bruxelles-National Airport?

Can I find deals for flights from Illinois to Bruxelles-National that include hotel bookings?

How can I find direct flights from Illinois to Bruxelles-National?

Can I find deals for business class flights from Illinois to Bruxelles-National?

What is the cheapest month to book a flight from Illinois to Brussels Bruxelles-National Airport?

Traveling to a place near Brussels Bruxelles-National Airport?

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Alternative routes for Illinois to Bruxelles-National

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Top 8 airlines flying from Illinois to Bruxelles-National

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Cheapest flights from Illinois to Bruxelles-National
Explore the most affordable flight options available from Illinois to Bruxelles-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.