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

Return flights

08 Oct - 12 Oct	Wizz Air Malta
01 Oct - 06 Oct	easyJet
03 Oct - 06 Oct	easyJet
03 Oct - 07 Oct	easyJet
15 Oct - 20 Oct	easyJet
01 Oct - 08 Oct	easyJet
09 Oct - 13 Oct	easyJet
14 Oct - 21 Oct	easyJet
04 Oct - 08 Oct	easyJet
16 Oct - 21 Oct	easyJet
26 Oct - 30 Nov	Wizz Air Malta
22 Oct - 08 Nov	Vueling Airlines
26 Oct - 15 Nov	Vueling Airlines
24 Oct - 08 Nov	Vueling Airlines
26 Oct - 08 Nov	Vueling Airlines
22 Oct - 03 Nov	Vueling Airlines
22 Oct - 01 Nov	Vueling Airlines
24 Oct - 03 Nov	Vueling Airlines
15 Oct - 03 Nov	Vueling Airlines
26 Oct - 03 Nov	Vueling Airlines

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

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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Cheapest return flights from Porto to Istanbul in October from 160€

Return flights