How does KAYAK find such low prices on flights from Illinois to Belgium?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Belgium. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Belgium?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Belgium from Illinois is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Illinois to Belgium?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Belgium with an airline and back to Illinois with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Belgium?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Belgium from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

Cheap Flights from Illinois to Belgium from $273

Search hundreds of travel sites at once for deals on flights to Belgium

...and more

In the last 7 days travelers have searched 41,909,192 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Low season	February
High season	June
Cheapest flight	$273

Best time to beat the crowds with an average 24% drop in price.

Most popular time to fly with an average 38% increase in price.

Flight from Chicago O'Hare Airport to Brussels Airport

How does KAYAK find such low prices on flights from Illinois to Belgium?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Belgium.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Belgium?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Belgium from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Illinois to Belgium?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Belgium with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Belgium?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Belgium from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Book cheap flights from Illinois to Belgium

Recent round-trip flight deals

10/31Thu

1 stopScandinavian Airlines

12h 00mORD-BRU

11/6Wed

1 stopScandinavian Airlines

28h 35mBRU-ORD

$449

9/29Sun

2 stopsScandinavian Airlines

15h 35mORD-BRU

10/23Wed

1 stopScandinavian Airlines

14h 25mBRU-ORD

$476

11/10Sun

1 stop

16h 45mORD-BRU

11/12Tue

1 stop

14h 20mBRU-ORD

$477

9/29Sun

2 stopsScandinavian Airlines

15h 35mORD-BRU

10/23Wed

2 stopsScandinavian Airlines

14h 55mBRU-ORD

$479

11/10Sun

2 stopsAmerican Airlines

13h 30mORD-BRU

11/12Tue

1 stopAmerican Airlines

14h 20mBRU-ORD

$482

10/6Sun

1 stopTAP AIR PORTUGAL

22h 35mORD-BRU

10/13Sun

1 stopTAP AIR PORTUGAL

26h 20mBRU-ORD

$520

9/22Sun

1 stopTAP AIR PORTUGAL

22h 35mORD-BRU

10/13Sun

1 stopTAP AIR PORTUGAL

26h 20mBRU-ORD

$548

11/14Thu

1 stopAer Lingus

10h 40mORD-BRU

11/21Thu

1 stopAer Lingus

14h 40mBRU-ORD

$557

8/16Fri

1 stopAer Lingus

10h 55mORD-BRU

8/25Sun

1 stopAer Lingus

15h 45mBRU-ORD

$577

10/8Tue

2 stops

17h 18mSTL-BRU

10/22Tue

2 stops

17h 00mBRU-STL

$722

Recent one-way flight deals

7/17Wed

2 stops

29h 00mORD-BRU

$273

7/10Wed

2 stops

29h 00mORD-BRU

$274

7/12Fri

2 stops

33h 10mORD-BRU

$279

7/8Mon

1 stopTurkish Airlines

17h 50mORD-BRU

$432

7/17Wed

1 stopTurkish Airlines

16h 00mORD-BRU

$453

8/25Sun

1 stopScandinavian Airlines

31h 05mORD-BRU

$473

7/12Fri

1 stopIcelandair

10h 25mORD-BRU

$493

9/4Wed

1 stopTAP AIR PORTUGAL

22h 35mORD-BRU

$508

9/14Sat

2 stopsScandinavian Airlines

31h 30mORD-BRU

$520

9/4Wed

2 stopsTAP AIR PORTUGAL

39h 15mORD-BRU

$530

Last minute flights from Illinois to Belgium

Last minute flight, train and bus deals

6/7Fri

multi-stopTAP AIR PORTUGAL

25h 45mORD-BRU

6/16Sun

multi-stopTAP AIR PORTUGAL

26h 15mBRU-ORD

$898

6/7Fri

multi-stopTAP AIR PORTUGAL

25h 45mORD-BRU

6/16Sun

multi-stopTAP AIR PORTUGAL

26h 15mBRU-ORD

$993

6/6Thu

multi-stopTAP AIR PORTUGAL

26h 22mORD-BRU

6/12Wed

multi-stopTAP AIR PORTUGAL

17h 10mBRU-ORD

$1,032

6/6Thu

multi-stop

24h 20mORD-BRU

6/12Wed

multi-stop

28h 20mBRU-ORD

$1,075

6/5Wed