Cheapest return flights from Chicago to Brussels in September from $464

Best time to book flights for Chicago (ORD) to Brussels (BRU) flights at AirHint

AirHint found the following cheapest return flights from Chicago (ORD) to Brussels (BRU) in September 2025 (see full year).

Return flights

21 Sep - 28 Sep Scandinavian Airlines
16 Sep - 21 Sep Scandinavian Airlines
09 Sep - 08 Oct Turkish Airlines
11 Sep - 18 Sep jetBlue
01 Sep - 08 Sep Icelandair
01 Sep - 08 Sep United direct
06 Sep - 13 Sep United
09 Sep - 08 Oct Brussels Airlines direct
21 Sep - 28 Sep Brussels Airlines direct
16 Sep - 21 Sep Brussels Airlines direct

Also check the deals for one-way flights from Chicago to Brussels in September.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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