Cheap flights from Belgium to Illinois from $374

The cheapest month to fly to Illinois from Belgium is in February. Flight prices, which tend to average around $655, 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 October is also cheap. Prices for this month can be found on momondo for an average of $684.

The cheapest day to depart from Belgium to Illinois is on a Wednesday when prices can be found for as low as $830. Flights from Belgium to Illinois on a Saturday will generally be more expensive and average around $1,050. 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 Belgium - Illinois flight prices

You are more likely to see cheaper flights to Illinois from Belgium when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $819 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Belgium for as low as $710 on momondo.

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

You could potentially save up to 42% on your flight if you consider stops on a Belgium to Illinois flight.

5 flights are operational daily from Belgium to Illinois as of September 2026. The most popular departure time for this route is 10:00AM, with 100% of flights per day taking off at noon.

As of September 2026, there are 36 flights per week flying from Belgium to Illinois. The most common day of the week flights depart is Thu, with 17% of flights taking off on this day.