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$256+ 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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BRU
Jan 25 — Feb 11
Sun 1/25
Sun 2/1
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 26, 2025.

This Booking.com deal was found by Cheapflights users on 12/23. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/313:50 pmORD - BRU
1 stop10h 45mAer Lingus
Mon 1/1210:15 amBRU - ORD
1 stop16h 00mAer Lingus
Deal found 12/23$769
This FlightHub deal was found by Cheapflights users on 12/25. 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.
Mon 12/299:55 pmORD - BRU
1 stop13h 50mLOT
Sun 2/1510:30 amBRU - ORD
1 stop16h 30mLOT
Deal found 12/25$831
This FlightHub deal was found by Cheapflights users on 12/23. 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.
Mon 12/293:50 pmORD - BRU
1 stop10h 45mAer Lingus
Sun 2/1510:15 amBRU - ORD
1 stop16h 00mAer Lingus
Deal found 12/23$839
This Ovago deal was found by Cheapflights users on 12/24. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/267:20 pmORD - BRU
1 stop12h 10mScandinavian Airlines
Sun 12/288:30 pmBRU - ORD
1 stop27h 15mScandinavian Airlines
Deal found 12/24$872
This Cheapflightsfares deal was found by Cheapflights users on 12/25. 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
2 stops18h 35mScandinavian Airlines
Sun 2/157:45 pmBRU - ORD
2 stops28h 00mScandinavian Airlines
Deal found 12/25$894
This Lufthansa deal was found by Cheapflights users on 12/23. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2411:48 amSTL - BRU
1 stop13h 17mLufthansa
Wed 12/317:00 amBRU - STL
1 stop13h 55mLufthansa
Deal found 12/23$1,429
This Kiwi.com deal was found by Cheapflights users on 12/25. 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.
Mon 12/294:20 pmORD - CRL
2 stops16h 00mMultiple Airlines
Wed 12/318:55 amCRL - ORD
1 stop18h 05mMultiple Airlines
Deal found 12/25$1,642
This Cheapflightsfares deal was found by Cheapflights users on 12/23. 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.
Sun 12/2812:48 pmSTL - BRU
1 stop12h 17mLufthansa
Sun 1/47:00 amBRU - STL
1 stop13h 55mLufthansa
Deal found 12/23$1,757
This Ovago deal was found by Cheapflights users on 12/23. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/283:10 pmSTL - BRU
2 stops15h 05mMultiple Airlines
Sun 1/410:10 amBRU - STL
1 stop14h 44mMultiple Airlines
Deal found 12/23$1,759
This Cheapflightsfares deal was found by Cheapflights users on 12/23. 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.
Sun 12/2812:48 pmSTL - BRU
2 stops23h 22mAustrian Airlines
Sun 1/47:55 pmBRU - STL
2 stops34h 57mAustrian Airlines
Deal found 12/23$1,849
This Kiwi.com deal was found by Cheapflights users on 12/25. 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.
Sun 12/288:25 pmORD - CRL
1 stop14h 50mMultiple Airlines
Fri 1/26:30 amCRL - ORD
2 stops20h 30mMultiple Airlines
Deal found 12/25$1,851
This Mytrip deal was found by Cheapflights users on 12/23. 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 12/243:50 pmSTL - BRU
2 stops20h 25mMultiple Airlines
Wed 12/311:30 pmBRU - STL
3 stops32h 59mMultiple Airlines
Deal found 12/23$2,062

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 26, 2025.

Round-trip from

$460
(Mytrip)

One-way from

$256
(Mytrip)

Popular in

June

Cheapest in

January

Average price

$726

Good round-trip deal

$929 or less

Good one-way deal

$723 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 26, 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

Mon 2/9

7:20 pm-7:50 pm

1 stop17h 30m

Brussels Bruxelles-National

Wed 2/18

10:20 am-4:45 pm

1 stop13h 25m

$468

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Thu 1/22

7:20 pm-2:30 pm

1 stop12h 10m

Brussels Bruxelles-National

Thu 1/29

10:20 am-4:55 pm

1 stop13h 35m

$468

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Sun 2/8

7:10 pm-2:30 pm

1 stop12h 20m

Brussels Bruxelles-National

Sun 2/15

7:45 pm-4:45 pm

2 stops28h 00m

$474

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Sat 1/24

7:20 pm-10:50 am

2 stops32h 30m

Brussels Bruxelles-National

Thu 2/5

8:30 pm-4:45 pm

1 stop27h 15m

$475

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 1/23

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Wed 1/28

7:00 am-1:55 pm

1 stop13h 55m

$476

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Fri 2/20

7:20 pm-9:40 am

1 stop31h 20m

Brussels Bruxelles-National

Sun 3/8

7:45 pm-5:45 pm

2 stops28h 00m

$479

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 1/22

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Mon 1/26

10:00 am-2:30 pm

2 stops35h 30m

$487

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 2/1

1:15 pm-8:55 am

1 stop12h 40m

Brussels Bruxelles-National

Mon 2/9

10:10 am-10:58 pm

1 stop19h 48m

$487

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 1/29

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Tue 2/3

10:00 am-2:30 pm

2 stops35h 30m

$487

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 2/5

11:22 am-8:05 am

1 stop13h 43m

Brussels Bruxelles-National

Mon 2/9

10:10 am-10:58 pm

1 stop19h 48m

$487

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/24

Showing 1-10 of 40 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 26, 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.

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 26, 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 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

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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 December 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$298Average$488FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$428Average$600FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$445Average$463FlexibilityNo cancel feeOn-timeN/A
Turkish AirlinesCheapest$492Average$793FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$531Average$722FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$551Average$692FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$590Average$1,034FlexibilityNo cancel feeOn-time69%
Brussels AirlinesCheapest$986Average$1,763FlexibilityNo cancel feeOn-timeN/A

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