AirHint found the following cheapest one-way flights from San Francisco (SFO) to Brussels (BRU) in December 2025 (see full year).
One-Way flights
| 11 Dec | Hawaiian Airlines | ||
| 23 Dec | Frontier Airlines | ||
| 15 Dec | Aer Lingus | ||
| 22 Dec | Alaska Airlines | ||
| 21 Dec | Hawaiian Airlines |
Also check the deals for return flights from San Francisco to Brussels in December.
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