Cheap flights from Brussels to Illinois from $380

The cheapest month to fly to Illinois from Brussels is in February. Flight prices, which tend to average around $683, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of February, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $725.

The cheapest day to depart from Brussels to Illinois is on a Tuesday when prices can be found for as low as $850. Flights from Brussels to Illinois on a Saturday will generally be more expensive and average around $1,070. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

You are more likely to see cheaper flights to Illinois from Brussels when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $834 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Brussels for as low as $710 on momondo.

The number of flights available between Brussels and Illinois is 6 per day as of November 2026. The most frequent departure time is 10:00AM, with 100% of daily flights leaving at noon.

42 flights are operational weekly from Brussels to Illinois as of November 2026. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.