AirHint found the following cheapest return flights from Bilbao (BIO) to Bucharest (OTP) in August 2025 (see full year).

Return flights

27 Aug - 01 Sep	Wizz Air Malta
19 Aug - 03 Sep	Vueling Airlines
06 Aug - 10 Aug	Wizz Air Malta
27 Aug - 31 Aug	Wizz Air Malta
11 Aug - 27 Aug	Vueling Airlines
25 Aug - 28 Aug	Air Europa
18 Aug - 27 Aug	Wizz Air Malta
06 Aug - 09 Aug	Wizz Air Malta
05 Aug - 10 Aug	Vueling Airlines
03 Aug - 12 Aug	easyJet
24 Aug - 28 Aug	Volotea
22 Aug - 31 Aug	Air Europa
01 Aug - 02 Sep	Vueling Airlines

Also check the deals for one-way flights from Bilbao to Bucharest in August.

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.

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Cheapest return flights from Bilbao to Bucharest in August from $213

Return flights