Cheapest return flights from Istanbul to Porto in October from $528

AirHint found the following cheapest return flights from Istanbul (IST) to Porto (OPO) in October 2026 (see full year).

Return flights

04 Oct - 04 Oct Turkish Airlines
04 Oct - 04 Oct Turkish Airlines direct

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

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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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