AirHint found the following cheapest return flights from Austin (AUS) to Brussels (BRU) in December 2025 (see full year).
Return flights
| 29 Dec - 14 Jan | Air Canada | ||
| 02 Dec - 09 Dec | Lufthansa | ||
| 28 Dec - 05 Jan | Air Canada | ||
| 30 Dec - 05 Jan | Lufthansa |
Also check the deals for one-way flights from Austin to Brussels in December.
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