Cheapest return flights from Bilbao to Istanbul in April from $271

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

Return flights

04 Apr - 15 Apr Lufthansa
01 Apr - 08 Apr Air Europa
18 Apr - 23 Apr Lufthansa
03 Apr - 11 Apr Air Europa
02 Apr - 11 Apr Air Europa
01 Apr - 10 Apr Air Europa
02 Apr - 10 Apr Air Europa
18 Apr - 23 Apr Turkish Airlines direct
01 Apr - 10 Apr Turkish Airlines direct
01 Apr - 08 Apr Turkish Airlines direct

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

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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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