AirHint found the following cheapest one-way flights from Istanbul (IST) to Porto (OPO) in December 2025 (see full year).
One-Way flights
| 28 Dec | AJet | ||
| 31 Dec | Turkish Airlines | ||
| 29 Dec | Pegasus Airlines | ||
| 30 Dec | Pegasus Airlines | ||
| 31 Dec | Turkish Airlines | direct | |
| 29 Dec | Turkish Airlines | direct | |
| 30 Dec | Turkish Airlines | direct |
Also check the deals for return flights from Istanbul to Porto in December.
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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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