Cheapest return flights from Porto to Istanbul in December from $234

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

Return flights

31 Dec - 10 Jan SunExpress
31 Dec - 04 Jan SunExpress
31 Dec - 03 Jan SunExpress
31 Dec - 02 Jan SunExpress
31 Dec - 10 Jan Turkish Airlines direct
31 Dec - 02 Jan Turkish Airlines direct
31 Dec - 03 Jan Turkish Airlines direct
31 Dec - 04 Jan Turkish Airlines direct

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

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