AirHint found the following cheapest return flights from Bilbao (BIO) to Sofia (SOF) in July 2025 (see full year).

Return flights

28 Jul - 31 Jul	Wizz Air Malta
22 Jul - 29 Jul	Vueling Airlines
11 Jul - 18 Jul	Volotea
09 Jul - 25 Jul	Vueling Airlines
25 Jul - 04 Aug	Wizz Air Malta
09 Jul - 26 Jul	Vueling Airlines
11 Jul - 13 Jul	Volotea
22 Jul - 23 Jul	Vueling Airlines
24 Jul - 31 Jul	Iberia
25 Jul - 08 Aug	Wizz Air Malta
24 Jul - 06 Aug	Iberia
10 Jul - 27 Jul	Vueling Airlines
10 Jul - 16 Jul	Vueling Airlines

Also check the deals for one-way flights from Bilbao to Sofia in July.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in Sofia

Cheap car rent in Sofia

Cheapest return flights from Bilbao to Sofia in July from $254

Return flights