Cheap flights from Illinois to Brussels from $345

The cheapest month to fly to Brussels Bruxelles-National Airport from Illinois is in February. Flight prices, which tend to average around $654, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Brussels Bruxelles-National Airport from Illinois during April instead. Flights to Brussels Bruxelles-National Airport in April, while not as cheap as those in February, still average around $655.

The cheapest day to depart from Illinois to Brussels Bruxelles-National Airport is on a Tuesday. Travelers who choose to depart for Brussels Bruxelles-National Airport on a Tuesday will often find tickets for as low as $1,147. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to Brussels Bruxelles-National Airport for around $1,438.

Our most recent data shows that the best time of day to fly to Brussels Bruxelles-National Airport is in the evening. Flights from Illinois to Brussels Bruxelles-National Airport during this time can be as low as $1,234. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,345 on average. Flights to Brussels Bruxelles-National Airport from Illinois in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from Chicago O'Hare Intl to Brussels Bruxelles-National for the best Illinois - Brussels Bruxelles-National flight prices

You are more likely to see cheaper flights to Brussels Bruxelles-National Airport from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Brussels Bruxelles-National Airport for around $911 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Brussels Bruxelles-National Airport from Illinois for as low as $591 on momondo.

There are 3 cabin classes available to choose from on Illinois to Brussels Bruxelles-National Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Scandinavian Airlines, Turkish Airlines, and Aer Lingus are the most popular carriers operating from Illinois to Brussels Bruxelles-National

Scandinavian Airlines, United Airlines and Icelandair are the top three most popular airlines that fly to Brussels Bruxelles-National Airport from Illinois according to our data. Scandinavian Airlines is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Brussels Bruxelles-National Airport. Keep in mind that there are 7 different airlines that fly to Brussels Bruxelles-National Airport on a routine basis, so you have a few additional options to choose from.

The number of flights available between Illinois and Brussels Bruxelles-National Airport is 5 per day as of November 2026. The most frequent departure time is 7:00PM, with 100% of daily flights leaving in the evening.

As of November 2026, 35 flights take off from Illinois and land in Brussels Bruxelles-National Airport each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.