AirHint found the following cheapest return flights from Lisbon (LIS) to Sofia (SOF) in September 2026 (see full year).
Return flights
| 26 Sep - 07 Oct | Air Europa | ||
| 23 Sep - 26 Sep | Ryanair | ||
| 28 Sep - 09 Oct | Air Europa | ||
| 24 Sep - 27 Sep | Ryanair | ||
| 30 Sep - 03 Oct | Ryanair | ||
| 04 Sep - 19 Sep | easyJet | ||
| 02 Sep - 09 Sep | TAP | ||
| 09 Sep - 30 Sep | SKY express |
Also check the deals for one-way flights from Lisbon to Sofia in September.
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