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

Return flights

31 Aug - 07 Sep	Air Europa
22 Aug - 30 Aug	Wizz Air
19 Aug - 28 Aug	Air Europa
22 Aug - 31 Aug	Wizz Air
06 Aug - 23 Aug	Vueling Airlines
14 Aug - 29 Aug	Vueling Airlines
31 Aug - 05 Sep	Air Europa
22 Aug - 01 Sep	Wizz Air
03 Aug - 12 Aug	Iberia
01 Aug - 22 Aug	Air Europa
21 Aug - 29 Aug	Air Europa
01 Aug - 14 Aug	Air Europa
01 Aug - 15 Aug	Air Europa
31 Aug - 07 Sep	Turkish Airlines	direct
31 Aug - 05 Sep	Turkish Airlines	direct

Also check the deals for one-way flights from Bilbao to Istanbul 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.

Book a cheap hotel in Istanbul

Cheap car rent in Istanbul

Cheapest return flights from Bilbao to Istanbul in August from 253€

Return flights