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Belgium

$267+ 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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BRU
Jan 13 — Jan 201
Tue 1/13
Tue 1/20
1 adult, Economy
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Cheap 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 December 14, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 12/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:20 pmORD - BRU
1 stop12h 10mScandinavian Airlines
Sun 2/157:45 pmBRU - ORD
2 stops28h 00mScandinavian Airlines
Deal found 12/13$717
This Cheapflightsfares deal was found by Cheapflights users on 12/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:30 pmORD - BRU
1 stop10h 25mIcelandair
Sun 2/1512:50 pmBRU - ORD
1 stop11h 30mIcelandair
Deal found 12/12$769
This FlightHub deal was found by Cheapflights users on 12/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/129:55 pmORD - BRU
1 stop13h 50mLOT
Fri 12/197:50 amBRU - ORD
1 stop19h 10mLOT
Deal found 12/12$912
This Kiwi.com deal was found by Cheapflights users on 12/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/136:30 pmORD - BRU
2 stops32h 10mScandinavian Airlines
Fri 12/263:10 pmBRU - ORD
1 stop32h 35mScandinavian Airlines
Deal found 12/12$955
This oojo deal was found by Cheapflights users on 12/12. 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.
Fri 12/129:55 pmORD - BRU
1 stop13h 50mLOT
Sun 12/217:40 pmBRU - ORD
2 stops31h 15mLOT
Deal found 12/12$963
This FlightHub deal was found by Cheapflights users on 12/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/129:55 pmORD - BRU
1 stop13h 50mLOT
Mon 12/227:55 pmBRU - ORD
1 stop31h 05mLOT
Deal found 12/12$997
This Mytrip deal was found by Cheapflights users on 12/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/302:00 pmORD - BRU
2 stops16h 15mMultiple Airlines
Tue 1/68:25 pmBRU - ORD
3 stops30h 20mMultiple Airlines
Deal found 12/12$1,034
This oojo deal was found by Cheapflights users on 12/12. 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.
Fri 12/267:20 pmORD - BRU
1 stop31h 20mScandinavian Airlines
Sun 12/288:30 pmBRU - ORD
1 stop27h 15mScandinavian Airlines
Deal found 12/12$1,041
This oojo deal was found by Cheapflights users on 12/12. 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.
Sun 12/148:25 pmORD - BRU
1 stop20h 25mTAP AIR PORTUGAL
Tue 12/235:55 pmBRU - ORD
1 stop28h 05mTAP AIR PORTUGAL
Deal found 12/12$1,043
This oojo deal was found by Cheapflights users on 12/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/269:55 pmORD - BRU
1 stop28h 40mLOT
Sun 12/287:40 pmBRU - ORD
2 stops31h 15mLOT
Deal found 12/14$1,050
This Mytrip deal was found by Cheapflights users on 12/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:30 pmORD - CRL
2 stops19h 45mMultiple Airlines
Tue 1/69:25 pmCRL - ORD
2 stops24h 35mMultiple Airlines
Deal found 12/12$1,052
This Mytrip deal was found by Cheapflights users on 12/13. 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.
Sun 12/217:40 pmORD - CRL
2 stops19h 35mMultiple Airlines
Sat 1/176:45 pmCRL - ORD
2 stops27h 00mMultiple Airlines
Deal found 12/13$1,074

Find flight deals from Illinois to Belgium

Keep the following information in mind while searching for Illinois to Belgium flight deals. Data was last updated December 14, 2025.

Round-trip from

$447
(Kiwi.com)

One-way from

$267
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$726

Good round-trip deal

$928 or less

Good one-way deal

$635 or less
From Illinois to Belgium
Search Deals
One-way flight from Illinois to Belgium
Search Deals
Highest demand for flights based on searches. 29% potential increase in price ($317 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Illinois to Belgium.
Search Deals
Price to beat on a one-way flight from Illinois to Belgium.
Search Deals

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 December 14, 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

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 1/28

12:44 pm-7:15 am

1 stop11h 31m

Brussels Bruxelles-National

Wed 2/4

10:30 am-7:27 pm

2 stops15h 57m

$449

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 1/12

1:15 pm-8:55 am

1 stop12h 40m

Brussels Bruxelles-National

Wed 1/21

10:10 am-5:43 pm

1 stop14h 33m

$454

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 1/28

12:44 pm-7:15 am

1 stop11h 31m

Brussels Bruxelles-National

Wed 2/4

5:00 pm-7:27 pm

1 stop33h 27m

$471

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 1/28

12:44 pm-7:15 am

1 stop11h 31m

Brussels Bruxelles-National

Wed 2/4

5:45 pm-11:59 pm

2 stops37h 14m

$471

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Thu 1/15

7:20 pm-9:40 am

1 stop31h 20m

Brussels Bruxelles-National

Wed 1/21

10:20 am-4:45 pm

1 stop13h 25m

$472

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 1/29

9:57 am-1:15 pm

2 stops20h 18m

Brussels Bruxelles-National

Tue 2/3

10:00 am-2:30 pm

2 stops35h 30m

$485

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Mon 2/23

7:20 pm-10:50 am

2 stops32h 30m

Brussels Bruxelles-National

Fri 2/27

7:15 pm-4:45 pm

1 stop28h 30m

$493

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 2/4

11:22 am-8:05 am

1 stop13h 43m

Brussels Bruxelles-National

Sun 2/8

9:30 am-10:58 pm

2 stops20h 28m

$493

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Wed 1/28

7:20 pm-6:40 pm

2 stops16h 20m

Brussels Bruxelles-National

Wed 2/4

7:20 pm-4:45 pm

2 stops28h 25m

$495

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 2/4

10:10 am-1:15 pm

2 stops20h 05m

Brussels Bruxelles-National

Sun 2/8

10:10 am-5:43 pm

1 stop14h 33m

$504

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 52 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, September is the cheapest month in which you can book a flight from Illinois to Belgium (average of $293). Flying from Illinois to Belgium in August is currently the most expensive (average of $496). 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 December 14, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 43% on flights from Illinois to Belgium by exploring options for tickets in the evening.

What is the cheapest day to fly from Illinois to Belgium?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Belgium. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Illinois to Belgium flight should consider departing on Wednesday mornings when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 December 14, 2025.

The most flights from USIL to BE0 are scheduled on a Monday (5 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 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 12h 40m. There are 4393 mi between Illinois and Belgium. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Illinois to Belgium one-way?

    The cheapest airlines for a one-way flight from Illinois to Belgium are Scandinavian Airlines ($214), TAP AIR PORTUGAL ($316), and United Airlines ($489).

  • 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, September is the cheapest month in which you can book a flight from Illinois to Belgium (average of $293). Flying from Illinois to Belgium in August is currently the most expensive (average of $496). 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 Belgium

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Illinois to Belgium

Discover the top 7 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 December 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$298Average$488FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$428Average$605FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$445Average$463FlexibilityNo cancel feeOn-timeN/A
Turkish AirlinesCheapest$492Average$793FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$536Average$751FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$551Average$692FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$590Average$1,039FlexibilityNo cancel feeOn-time69%

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