AirHint found the following cheapest return flights from San Diego (SAN) to Brussels (BRU) in December 2025 (see full year).
Return flights
| 08 Dec - 15 Dec | United | ||
| 23 Dec - 21 Jan | Air Canada | ||
| 28 Dec - 11 Jan | United | ||
| 08 Dec - 27 Dec | Air Canada | ||
| 23 Dec - 23 Jan | Air Canada | ||
| 20 Dec - 23 Jan | Delta | ||
| 23 Dec - 02 Jan | Frontier Airlines |
Also check the deals for one-way flights from San Diego to Brussels in December.
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