Cheap flights from Chicago to Belgium from $242

In general, April is the cheapest month to fly from Chicago to Belgium. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $647. If you are unable to visit Belgium during the month of April, then departing from Chicago during the month February is also very affordable. Most momondo users find prices during this month for around $665.

Our data shows that Tuesday is the least expensive day to fly to Belgium. Tickets to fly out on this day can be as low as $1,099. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,422. These prices are subject to change though, so be sure to set up a Price Alert for flights to Belgium.

Our most recent data shows that the best time of day to fly to Belgium is in the evening. Flights from Chicago to Belgium during this time can be as low as $1,234. Flights to Belgium are more costly in the afternoon, with an average ticket price of $1,269. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to Belgium from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Belgium for around $858 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Belgium from Chicago for as low as $572 on momondo.

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

Icelandair is the most popular carrier operating from Chicago to Belgium

United Airlines, Scandinavian Airlines and TAP AIR PORTUGAL are the top three most popular airlines that fly to Belgium from Chicago according to our data. United Airlines is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Belgium. Keep in mind that there are 8 different airlines that fly to Belgium on a routine basis, so you have a few additional options to choose from.

As of July 2026, there are 5 flights per day flying from Chicago to Belgium. The most common time of day flights depart is 6:00PM, with 100% of flights taking off in the evening.

As of July 2026, 35 flights take off from Chicago and land in Belgium each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.