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$212+ 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 2/23. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BRU
ene. 2 — ene. 91
vie. 1/2
vie. 1/9
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 diciembre 3, 2025.

This oojo deal was found by Cheapflights users on 12/1. 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.
mié. 12/37:10 pmORD - BRU
1 stop21h 40mTAP AIR PORTUGAL
dom. 12/76:00 amBRU - ORD
1 stop15h 45mTAP AIR PORTUGAL
Deal found 12/1$459
This Delta deal was found by Cheapflights users on 12/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/89:50 amSTL - BRU
1 stop16h 10mDelta
lun. 12/1511:00 amBRU - STL
1 stop16h 17mDelta
Deal found 12/1$499
This American Airlines deal was found by Cheapflights users on 12/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/154:49 pmSTL - BRU
2 stops16h 51mAmerican Airlines
jue. 12/2510:15 amBRU - STL
2 stops29h 20mAmerican Airlines
Deal found 12/2$545
This FlightHub deal was found by Cheapflights users on 12/2. 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.
lun. 12/293:50 pmORD - BRU
1 stop10h 45mAer Lingus
dom. 2/1510:15 amBRU - ORD
1 stop16h 00mAer Lingus
Deal found 12/2$581
This oojo deal was found by Cheapflights users on 12/1. 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.
vie. 12/58:15 pmORD - BRU
1 stop13h 50mTAP AIR PORTUGAL
dom. 12/76:00 amBRU - ORD
1 stop15h 45mTAP AIR PORTUGAL
Deal found 12/1$606
This Booking.com deal was found by Cheapflights users on 12/3. 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.
jue. 12/113:50 pmORD - BRU
1 stop10h 45mAer Lingus
mié. 3/1110:15 amBRU - ORD
1 stop14h 40mAer Lingus
Deal found 12/3$633
This Cheapflightsfares deal was found by Cheapflights users on 12/1. 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.
lun. 12/297:20 pmORD - BRU
1 stop12h 10mScandinavian Airlines
dom. 2/157:45 pmBRU - ORD
2 stops28h 00mScandinavian Airlines
Deal found 12/1$637
This Mytrip deal was found by Cheapflights users on 12/1. 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.
mié. 12/103:55 pmORD - CRL
2 stops17h 10mMultiple Airlines
dom. 12/143:20 pmCRL - ORD
2 stops28h 50mMultiple Airlines
Deal found 12/1$673
This Mytrip deal was found by Cheapflights users on 12/2. 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.
vie. 12/123:50 pmORD - CRL
2 stops19h 30mMultiple Airlines
mar. 12/166:20 amCRL - ORD
2 stops18h 35mMultiple Airlines
Deal found 12/2$685
This Mytrip deal was found by Cheapflights users on 12/2. 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.
dom. 12/73:50 pmORD - CRL
2 stops19h 25mMultiple Airlines
jue. 12/117:25 amCRL - ORD
2 stops17h 30mMultiple Airlines
Deal found 12/2$700
This Booking.com deal was found by Cheapflights users on 12/2. 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.
vie. 12/123:50 pmORD - BRU
1 stop10h 45mAer Lingus
mar. 12/1610:15 amBRU - ORD
1 stop14h 40mAer Lingus
Deal found 12/2$702
This Gotogate deal was found by Cheapflights users on 12/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/303:50 pmORD - BRU
1 stop10h 45mAer Lingus
mar. 1/610:15 amBRU - ORD
1 stop16h 00mAer Lingus
Deal found 12/2$709

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 diciembre 3, 2025.

Round-trip from

$386
(CrystalTravel)

One-way from

$212
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$842

Good round-trip deal

$939 or less

Good one-way deal

$493 or less
From Illinois to Belgium
Search Deals
One-way flight from Illinois to Belgium
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($279 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($34 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 diciembre 3, 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

dom. 3/29

7:00 am-9:40 am

2 stops43h 40m

Brussels Bruxelles-National

mar. 4/7

6:55 pm-4:10 pm

2 stops28h 15m

$412

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

mar. 1/13

12:44 pm-7:15 am

1 stop11h 31m

Brussels Bruxelles-National

mar. 1/20

11:35 am-7:27 pm

2 stops38h 52m

$419

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

mar. 1/13

12:44 pm-7:15 am

1 stop11h 31m

Brussels Bruxelles-National

mar. 1/20

6:30 am-11:59 pm

2 stops24h 29m

$421

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

jue. 1/15

7:05 am-9:40 am

2 stops19h 35m

Brussels Bruxelles-National

jue. 1/22

10:20 am-4:45 pm

1 stop13h 25m

$423

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

mar. 1/13

8:05 am-7:50 am

2 stops16h 45m

Brussels Bruxelles-National

mar. 1/20

10:00 am-2:30 pm

2 stops35h 30m

$441

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

lun. 1/12

7:05 am-9:40 am

2 stops19h 35m

Brussels Bruxelles-National

lun. 1/19

10:20 am-4:45 pm

1 stop13h 25m

$449

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

jue. 1/22

10:40 am-9:40 am

2 stops16h 00m

Brussels Bruxelles-National

vie. 1/30

10:20 am-4:55 pm

1 stop13h 35m

$449

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

dom. 1/25

7:10 pm-10:50 am

2 stops32h 40m

Brussels Bruxelles-National

mar. 2/3

11:30 am-4:45 pm

2 stops36h 15m

$453

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

jue. 1/29

11:20 am-8:55 am

1 stop14h 35m

Brussels Bruxelles-National

mar. 2/3

10:00 am-2:30 pm

2 stops35h 30m

$463

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

sáb. 1/17

7:00 am-9:40 am

2 stops19h 40m

Brussels Bruxelles-National

dom. 1/25

7:45 pm-4:45 pm

2 stops28h 00m

$464

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/2

Showing 1-10 of 60 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 diciembre 3, 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 diciembre 3, 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 11h 31m. 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

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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 diciembre 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$298Average$485FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$428Average$609FlexibilityNo 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$1,054FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$1,020Average$1,641FlexibilityNo cancel feeOn-time76%

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