Cheapest return flights from Chicago to Brussels in September from $515

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

16 Sep - 25 Sep Scandinavian Airlines
16 Sep - 23 Sep Scandinavian Airlines
09 Sep - 23 Sep Scandinavian Airlines
07 Sep - 19 Sep British Airways
12 Sep - 26 Sep Icelandair
03 Sep - 07 Sep Turkish Airlines
09 Sep - 16 Sep Icelandair
04 Sep - 11 Sep Icelandair
24 Sep - 01 Oct Icelandair
19 Sep - 26 Sep Icelandair
04 Sep - 11 Sep United direct
29 Sep - 06 Oct United 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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