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Cheap flights from Illinois to Brussels

ORD — BRU
Nov 15 — Nov 221
Sun 11/15
Sun 11/22
1 adult, Economy
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Find flight deals from Illinois to Brussels

Popular in

June

Cheapest in

February

Average price

$762
Highest demand for flights based on searches. 31% potential increase in price ($406 potential increase over avg. RT price).
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Cheapest flight prices on average. 9% potential price decrease ($79 potential savings vs. average RT price).
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Average for round-trip flights in October 2026
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Cheapflights Insights

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

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

Booking 33 days in advance of your planned departure date is, on average, the best time to get cheap flights from Illinois to Brussels. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Illinois to Brussels?

Currently, April is the cheapest month in which you can book a flight from Illinois to Brussels (average of $635). Flying from Illinois to Brussels in June is currently the most expensive (average of $1,489). 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?

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.

Related info for your journey

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

    For one-way options, check prices for Aer Lingus. According to our data, you can fly for as low as $235. Users have also found prices from $362 and $575 on Scandinavian Airlines and United Airlines, 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 (60%), Austrian Airlines (60%) or Brussels Airlines (60%) 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 $590. While the most popular route (Chicago O'Hare Intl - Brussels Bruxelles-National) can be booked for $567 on average, our data indicates $1,196 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, April is the cheapest month in which you can book a flight from Illinois to Brussels (average of $635). Flying from Illinois to Brussels in June is currently the most expensive (average of $1,489). 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.

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Browse thousands of different options on Cheapflights for your next trip

Top 7 airlines flying from Illinois to Brussels

AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$433Average$665FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$444Average$463FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$477Average$704FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$534Average$751FlexibilityNo cancel feeOn-timeN/A
Brussels AirlinesCheapest$752Average$1,656FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$849Average$1,362FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$969Average$1,369FlexibilityNo cancel feeOn-time76%

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