$356 Find Cheap Flights from Brussels to Illinois - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Brussels to Illinois departing on 9/23. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Book Cheap Brussels to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Brussels to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Brussels to Illinois

Mon, Aug 24 - Sun, Aug 30
Lufthansa Logo
6:20 am - 1:25 pm
BRU
-
STL
14h 05m
1 stop
Lufthansa Logo
3:30 pm - 11:50 am
STL
-
BRU
13h 20m
1 stop
$753Lufthansa
Mon, Aug 24 - Sun, Aug 30
Lufthansa Logo
6:20 am - 1:25 pm
BRU
-
STL
14h 05m
1 stop
Lufthansa Logo
12:27 pm - 7:45 am
STL
-
BRU
12h 18m
1 stop
$761Lufthansa
Mon, Aug 24 - Sun, Aug 30
Multiple Airlines Logo
6:20 am - 1:25 pm
BRU
-
STL
14h 05m
1 stop
Multiple Airlines Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
$763Multiple Airlines
Mon, Aug 24 - Mon, Aug 31
Multiple Airlines Logo
6:20 am - 1:25 pm
BRU
-
STL
14h 05m
1 stop
Multiple Airlines Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
$765Multiple Airlines
Mon, Aug 24 - Sun, Aug 30
Multiple Airlines Logo
6:20 am - 1:25 pm
BRU
-
STL
14h 05m
1 stop
Multiple Airlines Logo
9:30 am - 7:10 am
STL
-
BRU
14h 40m
2 stops
$766Multiple Airlines
Mon, Aug 24 - Sun, Aug 30
Multiple Airlines Logo
6:20 am - 3:38 pm
BRU
-
STL
16h 18m
2 stops
Multiple Airlines Logo
9:30 am - 7:10 am
STL
-
BRU
14h 40m
2 stops
$767Multiple Airlines
Thu, Jul 23 - Sat, Jan 9
Air Canada Logo
9:55 am - 8:22 pm
BRU
-
STL
17h 27m
1 stop
Air Canada Logo
4:05 pm - 1:15 pm
STL
-
BRU
14h 10m
2 stops
$779Air Canada
Mon, Aug 31 - Mon, Sep 14
Scandinavian Airlines Logo
9:10 pm - 4:10 pm
BRU
-
ORD
26h 00m
2 stops
Scandinavian Airlines Logo
7:15 pm - 9:40 am
ORD
-
BRU
31h 25m
1 stop
$789Scandinavian Airlines
Thu, Dec 3 - Mon, Dec 7
United Airlines Logo
8:25 am - 5:41 pm
BRU
-
MLI
16h 16m
2 stops
United Airlines Logo
1:00 pm - 8:55 am
MLI
-
BRU
12h 55m
1 stop
$840United Airlines
Thu, Dec 3 - Mon, Dec 7
United Airlines Logo
8:25 am - 5:41 pm
BRU
-
MLI
16h 16m
2 stops
United Airlines Logo
3:52 pm - 1:15 pm
MLI
-
BRU
14h 23m
2 stops
$842United Airlines
Booking Insights

KAYAK's insights & trends for Brussels to Illinois flights

Get data-powered insights and trends into flights from Brussels to Illinois to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Brussels to Illinois?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Brussels to Illinois departing in November.

What is the cheapest Brussels to Illinois flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Illinois from Brussels found in the last 5 days was to Chicago, at $743 round-trip. The most popular route is from Brussels Bruxelles-National Airport (BRU) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 5 days was $743.

What is the cheapest time of day to fly to Illinois?

The average price for all round-trip flights from Brussels to Illinois depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Illinois is generally in the morning, when round-trip flights cost $876 on average. The most expensive time of day to fly to Illinois is generally in the morning, which is peak travel time and where the average cost of a ticket is $876.

What is the cheapest month to fly from Brussels to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Brussels to Illinois, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Brussels to Illinois is August, when tickets cost $374 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $594 and $583 respectively.

What’s the cheapest day of the week to fly from Brussels to Illinois?

The average price of all round-trip flights from Brussels to Illinois clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Brussels to Illinois, look for departures on Wednesdays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from Illinois, Tuesday is the cheapest day to fly and Saturday is the most expensive.

How far in advance should I book a flight from Brussels to Illinois?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Brussels to Illinois, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Brussels to Illinois, you should book around 2 weeks before departure, which saves you about 35% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

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FAQs - booking Illinois flights

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

    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 Brussels to Illinois.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Brussels to 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 Brussels to Illinois?

    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 from Brussels to Illinois with an airline and back with another airline.

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

    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 from Brussels to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from Brussels to Illinois

Cabin class types available on flights to Illinois

Cabin classes available on flights to Illinois. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
First Class flights from Brussels to Illinois
Business Class flights from Brussels to Illinois
Premium Economy Class flights from Brussels to Illinois
Economy Class flights from Brussels to Illinois