AirHint found the following cheapest return flights from Istanbul (IST) to Porto (OPO) in October 2026 (see full year).
Return flights
| 10 Oct - 17 Oct | Pegasus Airlines | ||
| 24 Oct - 31 Oct | Air Europa | ||
| 10 Oct - 17 Oct | Turkish Airlines | direct |
Also check the deals for one-way flights from Istanbul to Porto in October.
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