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 42,816,550 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 42% 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

11/23Sat

2 stopsScandinavian Airlines

32h 55mORD-BRU

12/7Sat

1 stopScandinavian Airlines

14h 35mBRU-ORD

$386

11/23Sat

1 stopScandinavian Airlines

13h 45mORD-BRU

12/7Sat

1 stopScandinavian Airlines

14h 35mBRU-ORD

$458

11/13Wed

1 stopTAP AIR PORTUGAL

21h 35mORD-BRU

11/27Wed

1 stopTAP AIR PORTUGAL

16h 30mBRU-ORD

$541

8/17Sat

1 stopAer Lingus

10h 55mORD-BRU

8/25Sun

1 stopAer Lingus

15h 45mBRU-ORD

$580

10/15Tue

1 stopTurkish Airlines

16h 00mORD-BRU

11/4Mon

1 stopTurkish Airlines

30h 55mBRU-ORD

$656

11/13Wed

1 stopUnited Airlines

28h 45mORD-BRU

11/27Wed

nonstopUnited Airlines

9h 05mBRU-ORD

$674

11/13Wed

nonstopUnited Airlines

8h 00mORD-BRU

11/27Wed

nonstopUnited Airlines

9h 05mBRU-ORD

$676

9/22Sun

1 stopTAP AIR PORTUGAL

14h 05mORD-BRU

9/29Sun

1 stopTAP AIR PORTUGAL

26h 20mBRU-ORD

$683

7/10Wed

1 stopAer Lingus

10h 55mORD-BRU

8/24Sat

1 stopAer Lingus

15h 45mBRU-ORD

$702

9/10Tue

1 stopTurkish Airlines

17h 50mORD-BRU

9/18Wed

1 stopTurkish Airlines

33h 25mBRU-ORD

$728

Recent one-way flight deals

8/21Wed

3 stops

31h 06mORD-BRU

$273

8/20Tue

2 stops

20h 41mORD-BRU

$285

7/7Sun

1 stopTurkish Airlines

30h 55mORD-BRU

$439

8/19Mon

1 stopScandinavian Airlines

15h 45mORD-BRU

$449

8/18Sun

1 stopScandinavian Airlines

15h 45mORD-BRU

$463

7/24Wed

1 stopTurkish Airlines

16h 00mORD-BRU

$475

8/20Tue

1 stopIcelandair

10h 25mORD-BRU

$509

8/17Sat

1 stopIcelandair

10h 25mORD-BRU

$520

6/30Sun

1 stopTAP AIR PORTUGAL

14h 05mORD-BRU

$551

6/13Thu

1 stopTAP AIR PORTUGAL

12h 15mORD-BRU

$596

Last minute flights from Illinois to Belgium

Last minute flight, train and bus deals

6/1Sat

multi-stop

33h 42mORD-BRU

6/8Sat

multi-stop

33h 40mBRU-ORD

$1,054

5/30Thu