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$246+ Cheap flights from Illinois to Belgium

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.
ORD — BRU
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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Cheap flight deals from Illinois to Belgium

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

Round-trip from

$427
(oojo)

One-way from

$246
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$670

Good round-trip deal

$782 or less

Good one-way deal

$599 or less
From Illinois to Belgium
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One-way flight from Illinois to Belgium
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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 Belgium.
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Price to beat on a one-way flight from Illinois to Belgium.
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Find flight deals from Illinois to Belgium

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

This oojo deal was found by Cheapflights users on 8/16. 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.
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
This oojo deal was found by Cheapflights users on 8/17. 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.
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
This oojo deal was found by Cheapflights users on 8/17. 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 12/77:45 pmBRU - ORD
2 stops28h 00mScandinavian Airlines
Deal found 8/17$432
This oojo deal was found by Cheapflights users on 8/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
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
This oojo deal was found by Cheapflights users on 8/18. 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.
Sat 11/18:20 pmORD - BRU
2 stops32h 30mScandinavian Airlines
Wed 11/1211:30 amBRU - ORD
2 stops36h 15mScandinavian Airlines
Deal found 8/18$442
This oojo deal was found by Cheapflights users on 8/18. 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 10/318:20 pmORD - BRU
2 stops33h 35mScandinavian Airlines
Wed 11/1211:30 amBRU - ORD
2 stops36h 15mScandinavian Airlines
Deal found 8/18$444
This oojo deal was found by Cheapflights users on 8/17. 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.
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
This oojo deal was found by Cheapflights users on 8/16. 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.
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
This Mytrip deal was found by Cheapflights users on 8/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/57:10 pmORD - CRL
2 stops20h 40mMultiple Airlines
Tue 11/1110:35 amCRL - ORD
2 stops35h 25mMultiple Airlines
Deal found 8/15$518
This Mytrip deal was found by Cheapflights users on 8/17. 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.
Tue 10/73:45 pmORD - CRL
2 stops17h 10mMultiple Airlines
Tue 10/146:50 pmCRL - ORD
2 stops26h 10mMultiple Airlines
Deal found 8/17$571
This United Airlines deal was found by Cheapflights users on 8/17. 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 11/1211:49 amSTL - BRU
1 stop13h 16mUnited Airlines
Thu 11/2710:00 amBRU - STL
2 stops38h 39mUnited Airlines
Deal found 8/17$583
This Mytrip deal was found by Cheapflights users on 8/16. 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.
Sun 9/73:45 pmORD - CRL
1 stop17h 45mMultiple Airlines
Tue 9/167:35 amCRL - ORD
1 stop13h 25mMultiple Airlines
Deal found 8/16$593

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Belgium 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 August 18, 2025.
Use the filters below to find and compare flights from Illinois to Belgium that are best for you.

Fly from

Illinois

Fly to

Belgium

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

Fri 11/28

7:20 pm-11:55 am

2 stops33h 35m

Brussels Bruxelles-National

Sun 12/7

8:30 pm-4:45 pm

1 stop27h 15m

$432

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Sat 11/1

8:20 pm-10:50 am

2 stops32h 30m

Brussels Bruxelles-National

Wed 11/12

11:30 am-4:45 pm

2 stops36h 15m

$442

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Tue 10/21

7:15 pm-7:50 pm

1 stop17h 35m

Brussels Bruxelles-National

Mon 10/27

9:40 pm-9:05 pm

2 stops53h 25m

$445

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

$445

ChicagoBrussels

ORD - CRL

ORDCRL

Chicago O'Hare Intl

Wed 11/5

7:10 pm-10:50 pm

2 stops20h 40m

Charleroi Brussels

Tue 11/11

10:35 am-3:00 pm

2 stops35h 25m

$518

ChicagoBrussels

ORD - CRL

ORDCRL

Chicago O'Hare Intl

Tue 10/7

3:45 pm-3:55 pm

2 stops17h 10m

Charleroi Brussels

Tue 10/14

6:50 pm-2:00 pm

2 stops26h 10m

$571

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

ChicagoBrussels

ORD - CRL

ORDCRL

Chicago O'Hare Intl

Sun 9/7

3:45 pm-4:30 pm

1 stop17h 45m

Charleroi Brussels

Tue 9/16

7:35 am-2:00 pm

1 stop13h 25m

$593

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/17

Showing 1-10 of 53 results
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Best time to book a flight from Illinois to Belgium

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

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

Currently, November is the cheapest month in which you can book a flight from Illinois to Belgium (average of $614). Flying from Illinois to Belgium 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 BE?

Find hourly flight availability from Illinois to Belgium. 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.

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

Weekly flight availability from Illinois to Belgium

Explore weekly flight availability from Illinois to Belgium. 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 August 18, 2025.

The most flights from USIL to BE0 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 Belgium. 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 Belgium?

    Departing from Illinois to Belgium will take you 15h 50m. There are 4393 mi between Illinois and Belgium. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois to Belgium 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 Belgium?

    Currently, November is the cheapest month in which you can book a flight from Illinois to Belgium (average of $614). Flying from Illinois to Belgium 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Illinois to Belgium

See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from Illinois to Belgium

Discover the top 8 airlines that operate flights from Illinois to Belgium. 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 August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$312Average$494FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$405Average$535FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$492Average$811FlexibilityNo cancel feeOn-time77%
KLMCheapest$506Average$828FlexibilityNo cancel feeOn-time75%
Aer LingusCheapest$536Average$772FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$542Average$890FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$590Average$1,112FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$728Average$1,065FlexibilityNo cancel feeOn-time76%

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