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$251+ 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 9/28. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BRU
Aug 2 — Aug 91
Sat 8/2
Sat 8/9
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 July 28, 2025.

Round-trip from

$449
(oojo)

One-way from

$251
(Mytrip)

Popular in

July

Cheapest in

October

Average price

$1,123
From Illinois to Brussels
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One-way flight from Illinois to Brussels
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($144 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 28, 2025.

This oojo deal was found by Cheapflights users on 7/26. 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 11/287:20 pmORD - BRU
2 stops33h 35mScandinavian Airlines
Sun 12/77:45 pmBRU - ORD
2 stops28h 00mScandinavian Airlines
Deal found 7/26$443
This Mytrip deal was found by Cheapflights users on 7/27. 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.
Mon 10/2010:40 amORD - CRL
2 stops26h 25mMultiple Airlines
Sun 10/267:00 amCRL - ORD
2 stops18h 30mMultiple Airlines
Deal found 7/27$542
This Mytrip deal was found by Cheapflights users on 7/28. 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.
Mon 8/251:30 pmSTL - BRU
2 stops25h 10mMultiple Airlines
Mon 9/110:25 pmBRU - STL
2 stops28h 32mMultiple Airlines
Deal found 7/28$548
This FlightHub deal was found by Cheapflights users on 7/27. 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 9/2711:45 pmORD - BRU
1 stop35h 05mTurkish Airlines
Fri 10/34:15 pmBRU - ORD
1 stop24h 25mTurkish Airlines
Deal found 7/27$549
This Ticket deal was found by Cheapflights users on 7/28. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/101:30 pmSTL - BRU
1 stop11h 30mAir Canada
Tue 8/1910:00 amBRU - STL
1 stop17h 00mAir Canada
Deal found 7/28$602
This United Airlines deal was found by Cheapflights users on 7/28. 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.
Tue 9/91:30 pmSTL - BRU
1 stop11h 35mUnited Airlines
Wed 9/1710:00 amBRU - STL
2 stops35h 19mUnited Airlines
Deal found 7/28$674
This Mytrip deal was found by Cheapflights users on 7/27. 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.
Thu 10/169:35 amMDW - BRU
2 stops15h 30mMultiple Airlines
Wed 10/2210:00 amBRU - MDW
2 stops13h 24mMultiple Airlines
Deal found 7/27$723
This Delta deal was found by Cheapflights users on 7/27. 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.
Mon 12/19:30 amMDW - BRU
2 stops16h 30mDelta
Wed 12/106:15 amBRU - MDW
2 stops17h 08mDelta
Deal found 7/27$816
This Virgin Atlantic deal was found by Cheapflights users on 7/26. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1410:35 amMDW - BRU
2 stops15h 05mVirgin Atlantic
Wed 10/110:45 amBRU - MDW
1 stop13h 50mVirgin Atlantic
Deal found 7/26$916
This Cheapflightsfares deal was found by Cheapflights users on 7/27. 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 12/1911:05 amSTL - BRU
2 stops25h 05mAustrian Airlines
Mon 12/227:55 pmBRU - STL
2 stops34h 49mAustrian Airlines
Deal found 7/27$1,053
This Mytrip deal was found by Cheapflights users on 7/27. 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.
Tue 8/264:00 pmSTL - CRL
2 stops14h 55mMultiple Airlines
Tue 9/27:20 amCRL - STL
2 stops19h 37mMultiple Airlines
Deal found 7/27$1,106
This Air France deal was found by Cheapflights users on 7/26. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1311:00 amMDW - BRU
1 stop14h 40mAir France
Wed 10/110:45 amBRU - MDW
1 stop13h 50mAir France
Deal found 7/26$1,120

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 July 28, 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

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

$443

ChicagoBrussels

ORD - CRL

ORDCRL

Chicago O'Hare Intl

Mon 10/20

10:40 am-8:05 pm

2 stops26h 25m

Charleroi Brussels

Sun 10/26

7:00 am-7:30 pm

2 stops18h 30m

$542

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 8/25

1:30 pm-9:40 pm

2 stops25h 10m

Brussels Bruxelles-National

Mon 9/1

10:25 pm-7:57 pm

2 stops28h 32m

$548

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Sat 9/27

11:45 pm-5:50 pm

1 stop35h 05m

Brussels Bruxelles-National

Fri 10/3

4:15 pm-9:40 am

1 stop24h 25m

$549

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 8/10

1:30 pm-8:00 am

1 stop11h 30m

Brussels Bruxelles-National

Tue 8/19

10:00 am-8:00 pm

1 stop17h 00m

$602

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 9/9

1:30 pm-8:05 am

1 stop11h 35m

Brussels Bruxelles-National

Wed 9/17

10:00 am-2:19 pm

2 stops35h 19m

$674

ChicagoBrussels

MDW - BRU

MDWBRU

Chicago Midway

Thu 10/16

9:35 am-8:05 am

2 stops15h 30m

Brussels Bruxelles-National

Wed 10/22

10:00 am-4:24 pm

2 stops13h 24m

$723

ChicagoBrussels

MDW - BRU

MDWBRU

Chicago Midway

Tue 8/19

9:31 am-8:40 am

2 stops16h 09m

Brussels Bruxelles-National

Tue 8/26

10:45 am-9:44 pm

2 stops17h 59m

$837

ChicagoBrussels

MDW - BRU

MDWBRU

Chicago Midway

Sun 9/14

10:35 am-8:40 am

2 stops15h 05m

Brussels Bruxelles-National

Wed 10/1

10:45 am-5:35 pm

1 stop13h 50m

$916

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 12/19

11:05 am-7:10 pm

2 stops25h 05m

Brussels Bruxelles-National

Mon 12/22

7:55 pm-11:44 pm

2 stops34h 49m

$1,053

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 27 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, November is the cheapest month in which you can book a flight from Illinois to Brussels (average of $614). Flying from Illinois to Brussels in June is currently the most expensive (average of $1,081). 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 July 28, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Brussels as you normally would.

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 July 28, 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).

How much does it cost to fly round-trip from Illinois to Brussels?

Reviews of airlines servicing Brussels

Get insights into the airlines that provide service to Brussels. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Brussels. Reviews last updated July 28, 2025.
Get a feel of what it's like to fly with Delta, KLM, and Austrian Airlines from Illinois to Brussels by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,971 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,971 reviews
Delta
8.0
Very good
7,971 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,381 reviews
Delta
8.0
Very good
7,971 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Austrian Airlines
7.6
Good
820 reviews
Delta
8.0
Very good
7,971 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,463 reviews
Delta
8.0
Very good
7,971 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,893 reviews
Delta
8.0
Very good
7,971 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

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

    For one-way options, check prices for TAP AIR PORTUGAL. According to our data, you can fly for as low as $315. Users have also found prices from $367 and $487 on Scandinavian Airlines and Lufthansa, 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 (57%), Austrian Airlines (57%) or Brussels Airlines (57%) 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 $494. While the most popular route (Chicago O'Hare Intl - Brussels Bruxelles-National) can be booked for $443 on average our data indicates $2,494 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, November is the cheapest month in which you can book a flight from Illinois to Brussels (average of $614). Flying from Illinois to Brussels in June is currently the most expensive (average of $1,081). 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 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
Dulles Intl to Bruxelles-National flights
O'Hare Intl to Bruxelles-National flights
Dallas/Fort Worth to Bruxelles-National flights
LaGuardia to Bruxelles-National flights
Boston to Bruxelles-National flights
Reagan-National to Bruxelles-National flights
Baltimore to Bruxelles-National flights
Atlanta to Bruxelles-National flights
San Francisco to Bruxelles-National flights
Los Angeles to Bruxelles-National flights
Minneapolis to Bruxelles-National flights
Miami to Bruxelles-National flights
Charlotte to Bruxelles-National flights
Love Field to Bruxelles-National flights
Seattle to Bruxelles-National flights
Hobby to Bruxelles-National flights
Midway to Bruxelles-National flights
Denver to Bruxelles-National flights
Boston to Charleroi Brussels flights
John F Kennedy Intl to Charleroi Brussels flights
Dallas/Fort Worth to Charleroi Brussels flights
Newark to Charleroi Brussels flights
O'Hare Intl to Charleroi Brussels flights
Dulles Intl to Charleroi Brussels flights
George Bush Intcntl to Bruxelles-National flights
Philadelphia to Bruxelles-National flights
Sky Harbor Intl to Bruxelles-National flights
Raleigh to Bruxelles-National flights
Orlando to Bruxelles-National flights
Portland to Bruxelles-National flights
Richmond to Bruxelles-National flights
Las Vegas to Bruxelles-National flights
Norfolk to Bruxelles-National flights
San Jose to Bruxelles-National flights
Pittsburgh to Bruxelles-National flights
Ontario to Bruxelles-National flights
Tampa to Bruxelles-National flights
Minneapolis to Charleroi Brussels flights
Santa Ana to Bruxelles-National flights
Detroit to Bruxelles-National flights
San Diego to Bruxelles-National flights
Fort Lauderdale to Bruxelles-National flights
Los Angeles to Charleroi Brussels flights
Salt Lake City to Bruxelles-National flights
St. Louis to Bruxelles-National flights
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 July 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$312Average$501FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$405Average$529FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$492Average$821FlexibilityNo cancel feeOn-time77%
KLMCheapest$506Average$828FlexibilityNo cancel feeOn-time75%
TAP AIR PORTUGALCheapest$513Average$890FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$536Average$766FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$590Average$1,111FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$728Average$1,065FlexibilityNo cancel feeOn-time76%

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