HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Brussels

$368+ 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 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BRU
Apr 9 — Apr 161
Wed 4/9
Wed 4/16
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

Keep the following information in mind while searching for Illinois to Brussels flight deals. Data was last updated April 4, 2025.

Round-trip from

$457
(oojo)

One-way from

$368
(oojo)

Popular in

June

Cheapest in

October

Average price

$679
From Illinois to Brussels
Search Deals
One-way flight from Illinois to Brussels
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($268 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

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 April 4, 2025.

This oojo deal was found by Cheapflights users on 4/3. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/147:15 pmORD - BRU
1 stop17h 35mScandinavian Airlines
Sun 9/288:30 pmBRU - ORD
1 stop26h 40mScandinavian Airlines
Deal found 4/3$457
This FlightHub deal was found by Cheapflights users on 4/3. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1611:25 amORD - BRU
1 stop19h 00mTurkish Airlines
Tue 12/1611:40 amBRU - ORD
1 stop37h 45mTurkish Airlines
Deal found 4/3$533
This Mytrip deal was found by Cheapflights users on 4/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/79:08 pmORD - BRU
2 stops29h 32mMultiple Airlines
Sun 5/118:20 pmBRU - ORD
3 stops34h 45mMultiple Airlines
Deal found 4/3$678
This FlightHub deal was found by Cheapflights users on 4/4. 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.
Mon 5/123:45 pmORD - BRU
1 stop10h 55mAer Lingus
Wed 5/2110:20 amBRU - ORD
1 stop15h 40mAer Lingus
Deal found 4/4$686
This Mytrip deal was found by Cheapflights users on 4/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/77:25 pmORD - CRL
2 stops18h 15mMultiple Airlines
Tue 5/136:50 pmCRL - ORD
2 stops33h 25mMultiple Airlines
Deal found 4/3$686
This United deal was found by Cheapflights users on 4/3. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1210:39 amSTL - BRU
1 stop15h 21mUnited Airlines
Mon 5/269:50 amBRU - STL
2 stops36h 03mUnited Airlines
Deal found 4/3$737
This Air Canada deal was found by Cheapflights users on 4/3. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/181:30 pmSTL - BRU
2 stops13h 15mAir Canada
Sun 6/110:00 amBRU - STL
2 stops33h 36mAir Canada
Deal found 4/3$766
This United Airlines deal was found by Cheapflights users on 4/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/95:55 pmORD - BRU
Nonstop8h 00mUnited Airlines
Sun 11/1610:10 amBRU - ORD
Nonstop9h 05mUnited Airlines
Deal found 4/3$837
This Delta deal was found by Cheapflights users on 4/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/99:20 amMDW - BRU
2 stops16h 40mDelta
Sun 11/168:05 amBRU - MDW
2 stops17h 31mDelta
Deal found 4/3$879
This Gurufare deal was found by Cheapflights users on 4/3. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/224:05 pmORD - BRU
1 stop10h 40mBrussels Airlines
Tue 4/2910:15 amBRU - ORD
Nonstop8h 45mBrussels Airlines
Deal found 4/3$888
This oojo deal was found by Cheapflights users on 4/3. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/267:30 pmSTL - BRU
2 stops17h 05mBritish Airways
Mon 6/99:15 pmBRU - STL
2 stops28h 16mBritish Airways
Deal found 4/3$949
This Finnair deal was found by Cheapflights users on 4/3. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2310:08 amSTL - BRU
2 stops25h 12mMultiple Airlines
Mon 7/2811:40 amBRU - STL
2 stops19h 09mMultiple Airlines
Deal found 4/3$1,001

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 April 4, 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 9/14

7:15 pm-7:50 pm

1 stop17h 35m

Brussels Bruxelles-National

Sun 9/28

8:30 pm-4:10 pm

1 stop26h 40m

$457

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Tue 9/16

11:25 am-1:25 pm

1 stop19h 00m

Brussels Bruxelles-National

Tue 12/16

11:40 am-6:25 pm

1 stop37h 45m

$533

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Wed 5/7

9:08 pm-9:40 am

2 stops29h 32m

Brussels Bruxelles-National

Sun 5/11

8:20 pm-12:05 am

3 stops34h 45m

$678

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Mon 5/12

3:45 pm-9:40 am

1 stop10h 55m

Brussels Bruxelles-National

Wed 5/21

10:20 am-7:00 pm

1 stop15h 40m

$686

ChicagoBrussels

ORD - CRL

ORDCRL

Chicago O'Hare Intl

Wed 5/7

7:25 pm-8:40 pm

2 stops18h 15m

Charleroi Brussels

Tue 5/13

6:50 pm-9:15 pm

2 stops33h 25m

$686

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 5/12

10:39 am-9:00 am

1 stop15h 21m

Brussels Bruxelles-National

Mon 5/26

9:50 am-2:53 pm

2 stops36h 03m

$737

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 5/18

1:30 pm-9:45 am

2 stops13h 15m

Brussels Bruxelles-National

Sun 6/1

10:00 am-12:36 pm

2 stops33h 36m

$766

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Tue 4/22

4:05 pm-9:45 am

1 stop10h 40m

Brussels Bruxelles-National

Tue 4/29

10:15 am-12:00 pm

Nonstop8h 45m

$888

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Wed 5/7

3:00 pm-10:40 am

1 stop12h 40m

Brussels Bruxelles-National

Tue 5/13

6:55 pm-1:10 pm

1 stop25h 15m

$935

ChicagoBrussels

ORD - BRU

ORDBRU

Chicago O'Hare Intl

Tue 9/16

5:55 pm-9:00 am

Nonstop8h 05m

Brussels Bruxelles-National

Tue 12/16

10:10 am-12:15 pm

Nonstop9h 05m

$937

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/4

Showing 1-10 of 36 results
1
2
3
4

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 $1,146). 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 April 4, 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 April 4, 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).

Rainfall in Brussels by month

Plan your trip to Brussels by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Brussels ranges from 1.6 - 3.1 inches per month. January is typically the wettest month, when rainfall can reach 3.1 in. August is typically the driest time to visit Brussels when rainfall is around 1.6 in.

Temperature in Brussels by month

Plan your trip to Brussels by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Brussels, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 37.4 F).

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 April 4, 2025.
Get a feel of what it's like to fly with Delta, KLM and LOT from Illinois to Brussels by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,901 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,901 reviews
Delta
8.0
Very good
7,901 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,324 reviews
Delta
8.0
Very good
7,901 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
LOT
7.6
Good
1,065 reviews
Delta
8.0
Very good
7,901 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.4
Good
1,427 reviews
Delta
8.0
Very good
7,901 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,621 reviews
Delta
8.0
Very good
7,901 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 Scandinavian Airlines. According to our data, you can fly for as low as $368. Users have also found prices from $473 and $485 on TAP AIR PORTUGAL and Aer Lingus, 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 (83%), Air Canada (82%) or Austrian Airlines (82%) 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 $484. While the most popular route (Chicago O'Hare Intl - Brussels Bruxelles-National) can be booked for $457 on average our data indicates $3,175 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 $1,146). 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
Dulles Intl to Bruxelles-National flights
O'Hare Intl to Bruxelles-National flights
Seattle to Bruxelles-National flights
LaGuardia to Bruxelles-National flights
Dallas/Fort Worth to Bruxelles-National flights
Baltimore to Bruxelles-National flights
Reagan-National to Bruxelles-National flights
Los Angeles to Bruxelles-National flights
Boston to Bruxelles-National flights
San Francisco to Bruxelles-National flights
Atlanta to Bruxelles-National flights
Philadelphia to Bruxelles-National flights
Hobby to Bruxelles-National flights
Midway to Bruxelles-National flights
Miami to Bruxelles-National flights
John F Kennedy Intl to Charleroi Brussels flights
Love Field to Bruxelles-National flights
Denver to Bruxelles-National flights
Minneapolis to Bruxelles-National flights
Santa Ana to Bruxelles-National flights
George Bush Intcntl to Bruxelles-National flights
Orlando to Bruxelles-National flights
Charlotte to Bruxelles-National flights
Stewart to Bruxelles-National flights
Sky Harbor Intl to Bruxelles-National flights
Raleigh to Bruxelles-National flights
Detroit to Bruxelles-National flights
Ontario to Bruxelles-National flights
Portland to Bruxelles-National flights
Wilmington to Bruxelles-National flights
Austin to Bruxelles-National flights
Tampa to Bruxelles-National flights
Fort Lauderdale to Bruxelles-National flights
Dulles Intl to Charleroi Brussels flights
Newark to Charleroi Brussels flights
San Diego to Bruxelles-National flights
Oklahoma City to Bruxelles-National flights
Nashville to Bruxelles-National flights
Dallas/Fort Worth to Charleroi Brussels flights
New Orleans to Bruxelles-National flights
Boston to Charleroi Brussels flights
West Palm Beach to Bruxelles-National flights
Louisville to Bruxelles-National flights
Cincinnati to Bruxelles-National flights
O'Hare Intl to Charleroi Brussels flights
Providence to Bruxelles-National flights
Hartford to Bruxelles-National 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 April 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$405Average$570FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$438Average$619FlexibilityNo cancel feeOn-time77%
Turkish AirlinesCheapest$492Average$811FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$512Average$712FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$518Average$869FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$724Average$1,152FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$754Average$1,056FlexibilityNo cancel feeOn-time76%
Brussels AirlinesCheapest$813Average$1,351FlexibilityNo cancel feeOn-timeN/A

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.