Cheapest return flights from Istanbul to Bilbao in December from $149

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

Return flights

01 Dec - 08 Dec Pegasus Airlines direct
10 Dec - 15 Dec Pegasus Airlines direct
01 Dec - 07 Dec Pegasus Airlines direct
03 Dec - 07 Dec Pegasus Airlines direct
10 Dec - 14 Dec Pegasus Airlines direct
07 Dec - 10 Dec Pegasus Airlines direct
10 Dec - 10 Dec Pegasus Airlines
17 Dec - 21 Dec Pegasus Airlines direct
15 Dec - 10 Jan Pegasus Airlines
26 Dec - 31 Dec Pegasus Airlines direct
28 Dec - 04 Jan Pegasus Airlines direct
04 Dec - 07 Dec Pegasus Airlines
26 Dec - 02 Jan Pegasus Airlines direct
31 Dec - 04 Jan Vueling Airlines
20 Dec - 09 Jan Vueling Airlines
31 Dec - 04 Jan Pegasus Airlines direct
20 Dec - 05 Jan Vueling Airlines
28 Dec - 03 Jan Pegasus Airlines
27 Dec - 13 Jan Vueling Airlines
27 Dec - 14 Jan Vueling Airlines

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

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