AirHint found the following cheapest one-way flights from Porto (OPO) to Istanbul (IST) in December 2026 (see full year).
One-Way flights
| 09 Dec | Air Europa | ||
| 22 Dec | LOT | ||
| 22 Dec | Turkish Airlines | direct | |
| 09 Dec | Turkish Airlines | direct |
Also check the deals for return flights from Porto to Istanbul in December.
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