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

Return flights

08 May - 12 May	Vueling Airlines
14 May - 17 May	Wizz Air UK
01 May - 04 May	Air Europa
13 May - 16 May	Pegasus Airlines	direct
13 May - 17 May	Wizz Air UK
09 May - 13 May	Pegasus Airlines	direct
08 May - 16 May	Vueling Airlines
12 May - 16 May	Vueling Airlines
04 May - 10 May	Vueling Airlines
12 May - 15 May	Vueling Airlines
29 May - 01 Jun	Smart Wings

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

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 Istanbul in May from $198

Return flights