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$294+ 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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BRU
Dez 13 — Dez 201
Sa 12/13
Sa 12/20
1 adult, Economy
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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 November 13, 2025.

This SmartFares deal was found by Cheapflights users on 11/11. 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.
So 12/77:10 amORD - BRU
2 stops24h 20mScandinavian Airlines
Di 12/233:10 pmBRU - ORD
1 stop32h 35mScandinavian Airlines
Deal found 11/11$423
This Cheapflightsfares deal was found by Cheapflights users on 11/12. 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.
Mo 12/87:10 amORD - BRU
2 stops19h 30mScandinavian Airlines
Sa 12/1310:20 amBRU - ORD
1 stop13h 25mScandinavian Airlines
Deal found 11/12$447
This oojo deal was found by Cheapflights users on 11/12. 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.
Fr 11/288:15 pmORD - BRU
1 stop20h 35mTAP AIR PORTUGAL
So 12/76:00 amBRU - ORD
1 stop15h 45mTAP AIR PORTUGAL
Deal found 11/12$457
This Mytrip deal was found by Cheapflights users on 11/10. 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.
Fr 12/58:15 pmORD - BRU
1 stop13h 50mTAP AIR PORTUGAL
Mi 12/106:00 amBRU - ORD
1 stop16h 00mTAP AIR PORTUGAL
Deal found 11/10$463
This Mytrip deal was found by Cheapflights users on 11/10. 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.
Mi 12/106:30 pmORD - BRU
2 stops16h 05mMultiple Airlines
Do 12/189:25 amBRU - ORD
2 stops14h 55mMultiple Airlines
Deal found 11/10$468
This Mytrip deal was found by Cheapflights users on 11/10. 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.
Fr 12/57:20 pmORD - BRU
1 stop12h 10mScandinavian Airlines
Mi 12/107:20 pmBRU - ORD
2 stops28h 25mScandinavian Airlines
Deal found 11/10$485
This oojo deal was found by Cheapflights users on 11/11. 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.
Mo 12/17:20 pmORD - BRU
1 stop17h 30mScandinavian Airlines
Fr 12/58:30 pmBRU - ORD
1 stop27h 15mScandinavian Airlines
Deal found 11/11$503
This FlightHub deal was found by Cheapflights users on 11/10. 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.
Fr 11/287:20 pmORD - BRU
2 stops39h 55mScandinavian Airlines
So 12/710:20 amBRU - ORD
1 stop13h 25mScandinavian Airlines
Deal found 11/10$504
This Mytrip deal was found by Cheapflights users on 11/11. 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.
So 11/238:00 amORD - CRL
3 stops31h 20mMultiple Airlines
Mo 12/15:15 pmCRL - ORD
3 stops28h 40mMultiple Airlines
Deal found 11/11$598
This United Airlines deal was found by Cheapflights users on 11/11. 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.
Mo 12/154:05 pmSTL - BRU
2 stops14h 10mUnited Airlines
Do 12/2510:00 amBRU - STL
2 stops40h 22mUnited Airlines
Deal found 11/11$602
This Mytrip deal was found by Cheapflights users on 11/11. 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.
Do 11/133:50 pmORD - CRL
1 stop13h 45mMultiple Airlines
Fr 11/211:00 pmCRL - ORD
1 stop11h 55mMultiple Airlines
Deal found 11/11$609
This Mytrip deal was found by Cheapflights users on 11/12. 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.
Mi 12/106:30 pmORD - CRL
2 stops19h 25mMultiple Airlines
Mi 12/176:55 amCRL - ORD
3 stops32h 36mMultiple Airlines
Deal found 11/12$710

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 November 13, 2025.

Round-trip from

$423
(SmartFares)

One-way from

$294
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$751

Good round-trip deal

$991 or less

Good one-way deal

$805 or less
From Illinois to Belgium
Search Deals
One-way flight from Illinois to Belgium
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($283 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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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.
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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 November 13, 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

Do 1/29

9:57 am-1:15 pm

2 stops20h 18m

Brussels Bruxelles-National

Di 2/3

10:00 am-10:52 am

2 stops31h 52m

$480

EvansvilleBrussels

EVV - BRU

EVVBRU

Evansville Dress Regional

Do 1/29

6:00 am-2:15 pm

2 stops25h 15m

Brussels Bruxelles-National

Di 2/3

8:05 am-5:19 pm

2 stops16h 14m

$526

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mo 12/15

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Do 12/25

10:10 am-9:43 pm

1 stop18h 33m

$625

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Mo 12/29

7:20 pm-8:55 pm

2 stops18h 35m

Brussels Bruxelles-National

Do 1/8

9:50 am-9:35 pm

2 stops18h 45m

$673

ChicagoBrussels

ORD - CRL

ORDCRL

Chicago O'Hare Intl

So 5/10

3:45 pm-10:55 pm

2 stops24h 10m

Charleroi Brussels

Fr 5/15

6:35 pm-4:15 pm

2 stops28h 40m

$707

ChicagoBrussels

ORD - CRL

ORDCRL

Chicago O'Hare Intl

Mi 12/10

6:30 pm-8:55 pm

2 stops19h 25m

Charleroi Brussels

Mi 12/17

6:55 am-8:31 am

3 stops32h 36m

$710

ChicagoBrussels

ORD - CRL

ORDCRL

Chicago O'Hare Intl

Mo 12/8

5:00 am-9:35 pm

3 stops33h 35m

Charleroi Brussels

Sa 12/13

1:15 pm-2:45 pm

2 stops32h 30m

$718

ChicagoBrussels

ORD - CRL

ORDCRL

Chicago O'Hare Intl

Mo 4/20

3:45 pm-1:00 pm

2 stops14h 15m

Charleroi Brussels

Sa 4/25

5:35 pm-4:00 pm

2 stops29h 25m

$743

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Mi 1/28

5:50 pm-1:15 pm

1 stop12h 25m

Brussels Bruxelles-National

Fr 2/6

10:10 am-12:10 pm

Nonstop9h 00m

$747

ChicagoBrussels

ORD - CRL

ORDCRL

Chicago O'Hare Intl

Do 5/7

3:45 pm-10:30 pm

2 stops23h 45m

Charleroi Brussels

Di 5/12

1:50 pm-4:00 pm

2 stops33h 10m

$750

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/11

Showing 1-10 of 48 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 November 13, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 40% 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 November 13, 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 19h 40m. There are 4145 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, 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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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 November 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$310Average$489FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$428Average$588FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$492Average$807FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$536Average$775FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$551Average$692FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$639Average$1,043FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$725Average$1,641FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$744Average$890FlexibilityNo cancel feeOn-timeN/A

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