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$231+ Cheap flights from Illinois to Brussels

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 1/31. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BRU
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Illinois to Brussels

Keep the following information in mind while searching for Illinois to Brussels flight deals. Data was last updated September 15, 2025.

Round-trip from

$412
(FlightHub)

One-way from

$231
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$578
From Illinois to Brussels
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One-way flight from Illinois to Brussels
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Highest demand for flights based on searches. 26% potential increase in price ($288 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Illinois to Brussels

Cheapest flights from Illinois to Brussels
Explore the most affordable flight options available from Illinois to Brussels. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This FlightHub deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1810:30 amORD - BRU
2 stops21h 00mScandinavian Airlines
Sun 11/2310:20 amBRU - ORD
1 stop13h 25mScandinavian Airlines
Deal found 9/13$412
This Flighttix deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/287:05 amORD - BRU
2 stops30h 45mScandinavian Airlines
Tue 11/411:30 amBRU - ORD
2 stops36h 15mScandinavian Airlines
Deal found 9/13$433
This oojo deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/57:20 pmORD - BRU
1 stop17h 30mScandinavian Airlines
Tue 12/97:20 pmBRU - ORD
2 stops28h 25mScandinavian Airlines
Deal found 9/12$449
This FlightHub deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1810:35 amORD - BRU
2 stops20h 55mScandinavian Airlines
Thu 11/2711:30 amBRU - ORD
2 stops36h 15mScandinavian Airlines
Deal found 9/14$450
This FlightHub deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/87:20 pmORD - BRU
2 stops15h 55mScandinavian Airlines
Sat 11/158:30 pmBRU - ORD
1 stop27h 15mScandinavian Airlines
Deal found 9/14$455
This oojo deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/287:20 pmORD - BRU
2 stops33h 35mScandinavian Airlines
Sun 12/78:30 pmBRU - ORD
1 stop27h 15mScandinavian Airlines
Deal found 9/13$456
This SmartFares deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/77:05 amORD - BRU
2 stops19h 35mScandinavian Airlines
Tue 10/288:30 pmBRU - ORD
1 stop30h 35mScandinavian Airlines
Deal found 9/12$457
This Cheapflightsfares deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/67:20 pmORD - BRU
1 stop17h 30mScandinavian Airlines
Sun 11/910:20 amBRU - ORD
1 stop13h 25mScandinavian Airlines
Deal found 9/15$458
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:00 amSTL - BRU
2 stops17h 50mUnited Airlines
Thu 11/2710:00 amBRU - STL
2 stops35h 25mUnited Airlines
Deal found 9/14$534
This Mytrip deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/33:35 pmORD - CRL
2 stops22h 25mMultiple Airlines
Tue 11/116:20 amCRL - ORD
2 stops20h 40mMultiple Airlines
Deal found 9/13$536
This SmartFares deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/293:59 pmSTL - BRU
2 stops16h 31mScandinavian Airlines
Wed 11/53:10 pmBRU - STL
2 stops37h 28mScandinavian Airlines
Deal found 9/14$537
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/298:25 amSTL - BRU
1 stop16h 50mUnited Airlines
Wed 11/510:10 amBRU - STL
1 stop19h 35mUnited Airlines
Deal found 9/14$556

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
Use the filters below to find and compare flights from Illinois to Brussels that are best for you.

Fly from

Illinois

Fly to

Brussels

Route

Depart

Return

Price

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Sat 1/31

10:40 am-2:30 pm

2 stops20h 50m

Brussels Bruxelles-National

Tue 2/3

8:30 pm-4:45 pm

1 stop27h 15m

$450

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Fri 1/30

10:40 am-9:40 am

2 stops16h 00m

Brussels Bruxelles-National

Thu 2/5

10:20 am-4:45 pm

1 stop13h 25m

$450

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Mon 11/10

7:20 pm-10:50 am

2 stops32h 30m

Brussels Bruxelles-National

Sat 11/15

8:30 pm-4:45 pm

1 stop27h 15m

$456

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Tue 1/27

10:40 am-9:40 am

2 stops16h 00m

Brussels Bruxelles-National

Thu 2/5

7:20 pm-4:45 pm

2 stops28h 25m

$457

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Wed 1/28

10:40 am-9:40 am

2 stops16h 00m

Brussels Bruxelles-National

Fri 2/6

7:20 pm-4:45 pm

2 stops28h 25m

$473

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Sat 1/31

10:40 am-9:40 am

2 stops16h 00m

Brussels Bruxelles-National

Mon 2/9

10:20 am-4:45 pm

1 stop13h 25m

$480

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Wed 1/28

10:40 am-9:40 am

2 stops16h 00m

Brussels Bruxelles-National

Sat 2/7

10:20 am-4:45 pm

1 stop13h 25m

$480

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Thu 10/30

8:50 pm-8:55 pm

2 stops18h 05m

Brussels Bruxelles-National

Thu 11/6

10:20 am-4:45 pm

1 stop13h 25m

$496

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Wed 1/28

7:20 pm-9:40 am

1 stop31h 20m

Brussels Bruxelles-National

Sun 2/8

10:20 am-4:55 pm

1 stop13h 35m

$522

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Sun 3/1

7:20 pm-10:50 am

2 stops32h 30m

Brussels Bruxelles-National

Thu 3/5

8:30 pm-4:55 pm

1 stop27h 25m

$524

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 51 results
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Best time to book a flight from Illinois to Brussels

Have a flexible travel schedule? Discover the best time to fly to Brussels 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

What is the cheapest month to book a flight from Illinois to Brussels?

Currently, November is the cheapest month in which you can book a flight from Illinois to Brussels (average of $614). Flying from Illinois to Brussels in June is currently the most expensive (average of $1,077). 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?

Find hourly flight availability from Illinois to Brussels. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

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

Weekly flight availability from Illinois to Brussels

Explore weekly flight availability from Illinois to Brussels. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 15, 2025.

The most flights from USIL to BR1 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

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

  • How long is the flight from Illinois to Brussels?

    Scandinavian Airlines, United Airlines, and Delta can get you from Illinois to Brussels in just under 14h 50m. Your travel time can differ by up to 6h. The distance between Illinois and Brussels is about 4393 mi. This flight may include one or multiple stops.

  • What are the most popular routes from Illinois to Brussels?

    The most popular flight routes from Illinois to Brussels are Chicago O'Hare Intl - Brussels Bruxelles-National, Chicago Midway - Brussels Bruxelles-National and Chicago O'Hare Intl - Charleroi Brussels.

  • What are the most reliable airlines from Illinois to Brussels?

    Consider Air Canada (28%), Austrian Airlines (28%) or Brussels Airlines (28%) when booking your flight. These represent the most reliable airlines when flying from Illinois to Brussels.

  • What are the cheapest flights from Illinois to Brussels?

    Looking at all options, your cheapest flight can be booked for $536. While the most popular route (Chicago O'Hare Intl - Brussels Bruxelles-National) can be booked for $412 on average, our data indicates $2,391 when flying from Illinois to Brussels.

  • Can I find deals for flights from Illinois to Brussels that include hotel bookings?

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

  • How can I find direct flights from Illinois to Brussels?

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

  • Can I find deals for business class flights from Illinois to Brussels?

    Yes. Cheapflights offers flight deals from Illinois to Brussels 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?

    Currently, November is the cheapest month in which you can book a flight from Illinois to Brussels (average of $614). Flying from Illinois to Brussels in June is currently the most expensive (average of $1,077). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Brussels

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Bruxelles-National flights
Newark to Bruxelles-National flights
Dulles Intl to Bruxelles-National flights
O'Hare Intl to Bruxelles-National flights
LaGuardia to Bruxelles-National flights
Reagan-National to Bruxelles-National flights
Baltimore to Bruxelles-National flights
Boston to Bruxelles-National flights
John F Kennedy Intl to Charleroi Brussels flights
Atlanta to Bruxelles-National flights
Newark to Charleroi Brussels flights
Los Angeles to Bruxelles-National flights
Seattle to Bruxelles-National flights
Midway to Bruxelles-National flights
Dallas/Fort Worth to Bruxelles-National flights
Miami to Bruxelles-National flights
San Francisco to Bruxelles-National flights
Hobby to Bruxelles-National flights
Charlotte to Bruxelles-National flights
Denver to Bruxelles-National flights
Sky Harbor Intl to Bruxelles-National flights
Philadelphia to Bruxelles-National flights
Orlando to Bruxelles-National flights
Boston to Charleroi Brussels flights
Portland to Bruxelles-National flights
Detroit to Bruxelles-National flights
Minneapolis to Bruxelles-National flights
San Diego to Bruxelles-National flights
Dulles Intl to Charleroi Brussels flights
O'Hare Intl to Charleroi Brussels flights
Fort Lauderdale to Bruxelles-National flights
George Bush Intcntl to Bruxelles-National flights
Love Field to Bruxelles-National flights
Raleigh to Bruxelles-National flights
St. Louis to Bruxelles-National flights
Richmond to Bruxelles-National flights
Ontario to Bruxelles-National flights
Cleveland to Bruxelles-National flights
Los Angeles to Charleroi Brussels flights
Pittsburgh to Bruxelles-National flights
Tampa to Bruxelles-National flights
Providence to Bruxelles-National flights
Miami to Charleroi Brussels flights
Seattle to Charleroi Brussels flights
Pensacola to Bruxelles-National flights
Madison to Bruxelles-National flights
Salt Lake City to Bruxelles-National flights
Hartford to Bruxelles-National flights
Cincinnati to Bruxelles-National flights
West Palm Beach to Bruxelles-National flights

Top 9 airlines flying from Illinois to Brussels

Discover the top 9 airlines that operate flights from Illinois to Brussels. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$312Average$493FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$405Average$561FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$492Average$811FlexibilityNo cancel feeOn-time77%
KLMCheapest$506Average$828FlexibilityNo cancel feeOn-time75%
Aer LingusCheapest$536Average$774FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$551Average$692FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$590Average$1,115FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$728Average$1,110FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$744Average$890FlexibilityNo cancel feeOn-timeN/A

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