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

Return flights

28 Aug - 06 Sep	Iberia
28 Aug - 07 Sep	Iberia
29 Aug - 07 Sep	Wizz Air Malta
29 Aug - 06 Sep	Wizz Air Malta
27 Aug - 31 Aug	Iberia
30 Aug - 03 Sep	Wizz Air
26 Aug - 31 Aug	Vueling Airlines
30 Aug - 06 Sep	Wizz Air
30 Aug - 07 Sep	Wizz Air
23 Aug - 28 Aug	Wizz Air Malta
18 Aug - 01 Sep	Vueling Airlines
26 Aug - 30 Aug	Wizz Air Malta
22 Aug - 31 Aug	Vueling Airlines
25 Aug - 30 Aug	Air Europa
20 Aug - 27 Aug	Air Europa
19 Aug - 29 Aug	Wizz Air Malta
16 Aug - 05 Sep	easyJet
18 Aug - 24 Aug	Iberia
18 Aug - 26 Aug	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 203€

Return flights