Cheapest return flights from Chicago to Brussels in December from $448

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

Return flights

11 Dec - 26 Dec Scandinavian Airlines
13 Dec - 11 Jan Scandinavian Airlines
03 Dec - 19 Dec Scandinavian Airlines
22 Dec - 29 Dec Scandinavian Airlines
03 Dec - 19 Dec United direct
10 Dec - 17 Dec United
30 Dec - 06 Jan United
22 Dec - 29 Dec United direct
20 Dec - 27 Dec United
20 Dec - 02 Jan Air Canada
20 Dec - 02 Jan Lufthansa direct

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

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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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