AirHint found the following cheapest one-way flights from Bilbao (BIO) to Istanbul (IST) in December 2025 (see full year).

One-Way flights

08 Dec	Vueling Airlines
31 Dec	Vueling Airlines
14 Dec	Vueling Airlines
05 Dec	Vueling Airlines
24 Dec	Vueling Airlines
22 Dec	Vueling Airlines
16 Dec	Vueling Airlines
12 Dec	Vueling Airlines
28 Dec	Vueling Airlines
25 Dec	Vueling Airlines

Also check the deals for return flights from Bilbao to Istanbul in December.

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 one-way flights from Bilbao to Istanbul in December from $57

One-Way flights