HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Brussels

$260+ 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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BRU
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to Brussels with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 December 18, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 12/17. 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 12/17$698
This Cheapflightsfares deal was found by Cheapflights users on 12/17. 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 12/17$797
This oojo deal was found by Cheapflights users on 12/16. 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 stop17h 30mScandinavian Airlines
Wed 1/73:10 pmBRU - ORD
1 stop32h 35mScandinavian Airlines
Deal found 12/16$1,052
This Cheapflightsfares deal was found by Cheapflights users on 12/18. 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 12/267:20 pmORD - BRU
1 stop12h 10mScandinavian Airlines
Sun 12/2810:20 amBRU - ORD
1 stop13h 25mScandinavian Airlines
Deal found 12/18$1,057
This Ovago deal was found by Cheapflights users on 12/17. 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.
Thu 12/257:20 pmORD - BRU
1 stop17h 30mScandinavian Airlines
Wed 12/3110:20 amBRU - ORD
1 stop13h 25mScandinavian Airlines
Deal found 12/17$1,118
This oojo deal was found by Cheapflights users on 12/16. 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 12/247:20 pmORD - BRU
2 stops32h 30mScandinavian Airlines
Sat 12/278:30 pmBRU - ORD
1 stop27h 15mScandinavian Airlines
Deal found 12/16$1,148
This Kiwi.com deal was found by Cheapflights users on 12/17. 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 12/207:40 pmORD - CRL
2 stops29h 30mMultiple Airlines
Wed 12/317:00 amCRL - ORD
1 stop15h 00mMultiple Airlines
Deal found 12/17$1,532
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Wed 12/177:40 pmORD - CRL
1 stop33h 55mMultiple Airlines
Mon 12/298:35 amCRL - ORD
2 stops15h 45mMultiple Airlines
Deal found 12/16$1,533
This Kiwi.com deal was found by Cheapflights users on 12/17. 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 12/227:40 pmORD - CRL
2 stops20h 15mMultiple Airlines
Tue 12/303:30 pmCRL - ORD
1 stop30h 30mMultiple Airlines
Deal found 12/17$1,687
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Tue 12/164:20 pmORD - CRL
2 stops16h 35mMultiple Airlines
Tue 12/238:55 amCRL - ORD
1 stop18h 05mMultiple Airlines
Deal found 12/15$1,821
This Mytrip deal was found by Cheapflights users on 12/17. 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.
Fri 12/197:40 pmORD - CRL
2 stops18h 05mMultiple Airlines
Sun 1/44:30 pmCRL - ORD
3 stops34h 25mMultiple Airlines
Deal found 12/17$1,865
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Tue 12/307:40 pmORD - CRL
1 stop17h 15mMultiple Airlines
Fri 1/28:55 pmCRL - ORD
2 stops28h 30mMultiple Airlines
Deal found 12/16$1,895

Find flight deals from Illinois to Brussels

Keep the following information in mind while searching for Illinois to Brussels flight deals. Data was last updated December 18, 2025.

Round-trip from

$452
(CrystalTravel)

One-way from

$260
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$726
From Illinois to Brussels
Search Deals
One-way flight from Illinois to Brussels
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

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 December 18, 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

Sat 5/2

6:15 pm-11:55 pm

1 stop22h 40m

Brussels Bruxelles-National

Wed 5/13

5:55 am-4:00 pm

1 stop17h 05m

$458

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Thu 1/22

7:20 pm-2:30 pm

1 stop12h 10m

Brussels Bruxelles-National

Sun 1/25

8:30 pm-4:45 pm

1 stop27h 15m

$471

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

10:20 am-5:45 pm

1 stop13h 25m

$471

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Fri 1/30

7:10 pm-11:55 am

2 stops33h 45m

Brussels Bruxelles-National

Fri 2/6

10:20 am-4:45 pm

1 stop13h 25m

$480

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 2/6

11:20 am-1:15 pm

2 stops18h 55m

Brussels Bruxelles-National

Tue 2/10

10:00 am-11:02 am

2 stops32h 02m

$485

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 2/6

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Tue 2/10

10:00 am-2:30 pm

2 stops35h 30m

$487

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 1/29

11:22 am-8:05 am

1 stop13h 43m

Brussels Bruxelles-National

Tue 2/3

9:00 am-7:27 pm

2 stops17h 27m

$493

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

$494

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Mon 2/2

7:20 pm-9:40 am

1 stop31h 20m

Brussels Bruxelles-National

Fri 2/6

10:20 am-4:45 pm

1 stop13h 25m

$500

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-3:15 pm

2 stops36h 15m

$506

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 54 results
1
2
3
...
6

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 December 18, 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.

Weekly flight availability from Illinois to Brussels

Explore weekly flight availability from Illinois to Brussels. 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 18, 2025.

The most flights from USIL to BR1 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 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?

    TAP AIR PORTUGAL, Scandinavian Airlines, and United Airlines can get you from Illinois to Brussels in just under 12h 10m. Your travel time can differ by up to 10h 30m. The distance between Illinois and Brussels is about 4145 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 $214. Users have also found prices from $316 and $489 on TAP AIR PORTUGAL 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 SWISS (63%), Air Canada (38%) or Austrian Airlines (38%) 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 $410. While the most popular route (Chicago O'Hare Intl - Brussels Bruxelles-National) can be booked for $458 on average, our data indicates $952 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Brussels

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Bruxelles-National flights
Newark to Bruxelles-National flights
LaGuardia to Bruxelles-National flights
O'Hare Intl to Bruxelles-National flights
Dulles Intl to Bruxelles-National flights
Boston to Bruxelles-National flights
Seattle to Bruxelles-National flights
John F Kennedy Intl to Charleroi Brussels flights
Reagan-National to Bruxelles-National flights
Dallas/Fort Worth to Bruxelles-National flights
Atlanta to Bruxelles-National flights
Baltimore to Bruxelles-National flights
Los Angeles to Bruxelles-National flights
Newark to Charleroi Brussels flights
Hobby to Bruxelles-National flights
San Francisco to Bruxelles-National flights
Miami to Bruxelles-National flights
Boston to Charleroi Brussels flights
Philadelphia to Bruxelles-National flights
Midway to Bruxelles-National flights
Orlando to Bruxelles-National flights
Minneapolis to Bruxelles-National flights
Love Field to Bruxelles-National flights
Tampa to Bruxelles-National flights
Raleigh to Bruxelles-National flights
George Bush Intcntl to Bruxelles-National flights
Denver to Bruxelles-National flights
Fort Lauderdale to Bruxelles-National flights
Cleveland to Bruxelles-National flights
Cincinnati to Bruxelles-National flights
Dulles Intl to Charleroi Brussels flights
Austin to Bruxelles-National flights
O'Hare Intl to Charleroi Brussels flights
San Jose to Bruxelles-National flights
Charlotte to Bruxelles-National flights
Portland to Bruxelles-National flights
Santa Ana to Bruxelles-National flights
Ontario to Bruxelles-National flights
Indianapolis to Bruxelles-National flights
Madison to Bruxelles-National flights
Richmond to Bruxelles-National flights
St. Louis to Bruxelles-National flights
Miami to Charleroi Brussels flights
Columbus to Bruxelles-National flights
San Diego to Bruxelles-National flights
Los Angeles to Charleroi Brussels flights
Sacramento to Bruxelles-National flights
Charleston to Bruxelles-National flights
Detroit to Bruxelles-National flights
Tucson to Bruxelles-National flights

Top 7 airlines flying from Illinois to Brussels

Discover the top 7 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 December 18, 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%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.