AirHint found the following cheapest return flights from Chicago (ORD) to Brussels (BRU) in December 2026 (see full year).
Return flights
| 01 Dec - 09 Dec | Scandinavian Airlines | ||
| 01 Dec - 09 Dec | SWISS | direct | |
| 26 Dec - 02 Jan | Air Serbia | ||
| 22 Dec - 29 Dec | Iberia | ||
| 18 Dec - 01 Jan | TAP | ||
| 22 Dec - 29 Dec | SWISS | direct |
Also check the deals for one-way flights from Chicago to Brussels in December.
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