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

Return flights

29 Aug - 11 Sep	Turkish Airlines
30 Aug - 13 Sep	Etihad Airways
15 Aug - 06 Sep	Vueling Airlines
15 Aug - 05 Sep	Vueling Airlines
04 Aug - 25 Aug	Vueling Airlines
09 Aug - 25 Aug	Vueling Airlines
04 Aug - 26 Aug	Vueling Airlines
08 Aug - 24 Aug	KLM
08 Aug - 23 Aug	KLM

Also check the deals for one-way flights from Bilbao to Singapore 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 Singapore in August from 701€

Return flights