AirHint found the following cheapest return flights from Bangkok (BKK) to Sofia (SOF) in December 2025 (see full year).
Return flights
| 18 Dec - 10 Jan | Nok Air | ||
| 12 Dec - 19 Dec | Etihad Airways | ||
| 01 Dec - 04 Dec | Austrian Airlines |
Also check the deals for one-way flights from Bangkok to Sofia in December.
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