Cheapest return flights from Chicago to Brussels in September from $385

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

Return flights

22 Sep - 30 Sep Lufthansa
22 Sep - 20 Oct Scandinavian Airlines
21 Sep - 28 Sep Scandinavian Airlines
22 Sep - 29 Sep Scandinavian Airlines
23 Sep - 30 Sep Spirit Airlines
26 Sep - 28 Sep Spirit Airlines
16 Sep - 23 Sep Scandinavian Airlines
24 Sep - 01 Oct Spirit Airlines
14 Sep - 20 Sep Scandinavian Airlines
19 Sep - 25 Sep Spirit Airlines
02 Sep - 09 Sep Icelandair
06 Sep - 13 Sep Icelandair
22 Sep - 20 Oct United direct
26 Sep - 03 Oct United direct
29 Sep - 06 Oct United direct
24 Sep - 01 Oct 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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