AirHint found the following cheapest return flights from Sofia (SOF) to Singapore (SIN) in September 2026 (see full year).
Return flights
| 19 Sep - 26 Sep | Ryanair | ||
| 17 Sep - 30 Sep | Air France | ||
| 23 Sep - 30 Sep | Air France | ||
| 20 Sep - 26 Sep | Austrian Airlines | ||
| 18 Sep - 26 Sep | Air France |
Also check the deals for one-way flights from Sofia to Singapore in September.
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