AirHint found the following cheapest one-way flights from San Francisco (SFO) to Sofia (SOF) in December 2025 (see full year).
One-Way flights
| 13 Dec | Lufthansa | ||
| 26 Dec | Lufthansa | ||
| 14 Dec | Aer Lingus | ||
| 15 Dec | Aer Lingus | ||
| 16 Dec | WestJet | ||
| 17 Dec | Air Canada |
Also check the deals for return flights from San Francisco to Sofia in December.
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