AirHint found the following cheapest return flights from Istanbul (IST) to Bilbao (BIO) in August 2026 (see full year).

Return flights

13 Aug - 27 Aug	Pegasus Airlines	direct
12 Aug - 27 Aug	Vueling Airlines
12 Aug - 24 Aug	Vueling Airlines
07 Aug - 27 Aug	Vueling Airlines
03 Aug - 24 Aug	Vueling Airlines
12 Aug - 20 Aug	Vueling Airlines
27 Aug - 27 Aug	Vueling Airlines
03 Aug - 20 Aug	Vueling Airlines
05 Aug - 24 Aug	Vueling Airlines
07 Aug - 24 Aug	Vueling Airlines
27 Aug - 07 Sep	Vueling Airlines
25 Aug - 07 Sep	Vueling Airlines

Also check the deals for one-way flights from Istanbul to Bilbao 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 Istanbul to Bilbao in August from $285

Return flights