Cheapest return flights from Istanbul to Bilbao in May from $253

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

Return flights

16 May - 19 May Pegasus Airlines direct
14 May - 28 May Vueling Airlines
14 May - 30 May Vueling Airlines
13 May - 28 May Vueling Airlines
13 May - 30 May Vueling Airlines
14 May - 16 May Vueling Airlines
10 May - 12 May Vueling Airlines
23 May - 31 May Pegasus Airlines direct
13 May - 16 May Vueling Airlines
10 May - 28 May Vueling Airlines
18 May - 06 Jun Vueling Airlines
18 May - 04 Jun Vueling Airlines
25 May - 13 Jun Vueling Airlines
31 May - 16 Jun Vueling Airlines
21 May - 09 Jun Vueling Airlines
21 May - 06 Jun Vueling Airlines
21 May - 04 Jun Vueling Airlines
25 May - 09 Jun Vueling Airlines
17 May - 06 Jun Vueling Airlines
17 May - 04 Jun Vueling Airlines

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

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