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$250+ Cheap flights from Illinois to Brussels

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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BRU
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Illinois to Brussels

Keep the following information in mind while searching for Illinois to Brussels flight deals. Data was last updated October 30, 2025.

Round-trip from

$411
(Cheapflightsfares)

One-way from

$250
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$600
From Illinois to Brussels
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One-way flight from Illinois to Brussels
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Highest demand for flights based on searches. 25% potential increase in price ($281 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).
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Average for round-trip flights in October 2025
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Find flight deals from Illinois to Brussels

Cheapest flights from Illinois to Brussels
Explore the most affordable flight options available from Illinois to Brussels. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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 12/77:10 amORD - BRU
2 stops19h 30mScandinavian Airlines
Sun 12/147:45 pmBRU - ORD
2 stops28h 00mScandinavian Airlines
Deal found 10/30$418
This FlightHub deal was found by Cheapflights users on 10/29. 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 11/288:15 pmORD - BRU
1 stop20h 35mTAP AIR PORTUGAL
Sun 12/76:00 amBRU - ORD
1 stop15h 45mTAP AIR PORTUGAL
Deal found 10/29$445
This FlightHub deal was found by Cheapflights users on 10/29. 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.
Sat 12/67:20 pmORD - BRU
2 stops56h 30mScandinavian Airlines
Tue 12/97:20 pmBRU - ORD
2 stops52h 25mScandinavian Airlines
Deal found 10/29$455
This oojo deal was found by Cheapflights users on 10/29. 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 12/37:10 pmORD - BRU
1 stop14h 55mTAP AIR PORTUGAL
Sun 1/186:00 amBRU - ORD
1 stop15h 45mTAP AIR PORTUGAL
Deal found 10/29$456
This Cheapflightsfares deal was found by Cheapflights users on 10/29. 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.
Fri 11/287:20 pmORD - BRU
1 stop12h 10mScandinavian Airlines
Fri 12/510:20 amBRU - ORD
1 stop13h 25mScandinavian Airlines
Deal found 10/29$458
This CrystalTravel deal was found by Cheapflights users on 10/29. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/57:20 pmORD - BRU
1 stop12h 10mScandinavian Airlines
Sun 1/187:45 pmBRU - ORD
2 stops28h 00mScandinavian Airlines
Deal found 10/29$459
This oojo deal was found by Cheapflights users on 10/29. 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 11/307:20 pmORD - BRU
1 stop17h 30mScandinavian Airlines
Wed 12/33:10 pmBRU - ORD
1 stop32h 35mScandinavian Airlines
Deal found 10/29$461
This Mytrip deal was found by Cheapflights users on 10/29. 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 11/307:20 pmORD - BRU
2 stops18h 35mScandinavian Airlines
Tue 12/97:20 pmBRU - ORD
2 stops52h 25mScandinavian Airlines
Deal found 10/29$463
This oojo deal was found by Cheapflights users on 10/30. 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 11/308:25 pmORD - BRU
1 stop13h 40mTAP AIR PORTUGAL
Tue 12/911:50 amBRU - ORD
1 stop34h 10mTAP AIR PORTUGAL
Deal found 10/30$465
This United Airlines deal was found by Cheapflights users on 10/30. 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.
Thu 11/278:20 amSTL - BRU
2 stops21h 55mUnited Airlines
Thu 12/410:00 amBRU - STL
2 stops38h 03mUnited Airlines
Deal found 10/30$481
This United Airlines deal was found by Cheapflights users on 10/30. 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.
Mon 12/153:19 pmSTL - BRU
2 stops14h 56mUnited Airlines
Thu 12/2510:10 amBRU - STL
1 stop16h 08mUnited Airlines
Deal found 10/30$624
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/309:55 pmORD - CRL
2 stops17h 50mMultiple Airlines
Tue 12/98:55 amCRL - ORD
1 stop18h 05mMultiple Airlines
Deal found 10/29$625

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Brussels 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 October 30, 2025.
Use the filters below to find and compare flights from Illinois to Brussels that are best for you.

Fly from

Illinois

Fly to

Brussels

Route

Depart

Return

Price

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Sun 3/1

7:20 pm-9:40 am

1 stop31h 20m

Brussels Bruxelles-National

Thu 3/5

7:15 pm-4:55 pm

1 stop28h 40m

$479

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 11/27

8:20 am-1:15 pm

2 stops21h 55m

Brussels Bruxelles-National

Thu 12/4

10:00 am-5:03 pm

2 stops38h 03m

$481

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

7:45 pm-4:45 pm

2 stops28h 00m

$488

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 4/1

4:05 pm-8:50 am

2 stops33h 45m

Brussels Bruxelles-National

Wed 4/8

10:00 am-3:21 pm

2 stops36h 21m

$582

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 4/1

3:30 pm-10:10 am

1 stop11h 40m

Brussels Bruxelles-National

Wed 4/8

8:30 am-1:30 pm

1 stop12h 00m

$600

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 4/1

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Wed 4/8

8:30 am-1:30 pm

1 stop12h 00m

$601

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 12/15

3:19 pm-1:15 pm

2 stops14h 56m

Brussels Bruxelles-National

Thu 12/25

10:10 am-7:18 pm

1 stop16h 08m

$624

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

3:14 pm-1:15 pm

2 stops15h 01m

Brussels Bruxelles-National

Thu 11/27

10:00 am-2:24 pm

2 stops35h 24m

$630

ChicagoBrussels

ORD - CRL

ORDCRL

Chicago O'Hare Intl

Fri 11/28

4:20 pm-7:15 pm

2 stops19h 55m

Charleroi Brussels

Fri 12/5

9:05 pm-1:10 pm

2 stops23h 05m

$642

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Wed 11/12

7:20 pm-6:40 pm

2 stops16h 20m

Brussels Bruxelles-National

Sat 11/15

10:20 am-9:27 pm

2 stops18h 07m

$655

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 58 results
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Best time to book a flight from Illinois to Brussels

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

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

Currently, September is the cheapest month in which you can book a flight from Illinois to Brussels (average of $293). Flying from Illinois to Brussels 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 BRU?

Find hourly flight availability from Illinois to Brussels. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

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

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

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

Travelers seeking maximum savings on their Illinois to Brussels 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.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Brussels. 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 Brussels?

    Scandinavian Airlines, United Airlines, and Delta can get you from Illinois to Brussels in just under 20h. Your travel time can differ by up to 11h 20m. The distance between Illinois and Brussels is about 4320 mi. This flight may include one or multiple stops.

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

    For one-way options, check prices for Scandinavian Airlines. According to our data, you can fly for as low as $361. Users have also found prices from $424 and $455 on Lufthansa and United Airlines, respectively.

  • What are the most popular routes from Illinois to Brussels?

    The most popular flight routes from Illinois to Brussels are Chicago O'Hare Intl - Brussels Bruxelles-National, Chicago Midway - Brussels Bruxelles-National and Chicago O'Hare Intl - Charleroi Brussels.

  • What are the most reliable airlines from Illinois to Brussels?

    Consider Air Canada (65%), Austrian Airlines (65%) or Brussels Airlines (65%) when booking your flight. These represent the most reliable airlines when flying from Illinois to Brussels.

  • What are the cheapest flights from Illinois to Brussels?

    Looking at all options, your cheapest flight can be booked for $618. While the most popular route (Chicago O'Hare Intl - Brussels Bruxelles-National) can be booked for $451 on average, our data indicates $2,522 when flying from Illinois to Brussels.

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

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

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

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

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

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

    Currently, September is the cheapest month in which you can book a flight from Illinois to Brussels (average of $293). Flying from Illinois to Brussels 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 Brussels

See prices for flight routes from nearby airports that may be better suited for you.
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Dulles Intl to Charleroi Brussels flights
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O'Hare Intl to Charleroi Brussels flights
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San Francisco to Charleroi Brussels flights

Top 8 airlines flying from Illinois to Brussels

Discover the top 8 airlines that operate flights from Illinois to Brussels. 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 October 30, 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$590Average$1,035FlexibilityNo cancel feeOn-time69%
TAP AIR PORTUGALCheapest$744Average$890FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$754Average$1,641FlexibilityNo cancel feeOn-time76%

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