AirHint found the following cheapest return flights from Bilbao (BIO) to Sofia (SOF) in June 2026 (see full year).
Return flights
| 09 Jun - 13 Jun | Vueling Airlines | ||
| 13 Jun - 21 Jun | Wizz Air Malta | ||
| 23 Jun - 01 Jul | easyJet |
Also check the deals for one-way flights from Bilbao to Sofia in June.
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