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

Return flights

18 Oct - 21 Oct	easyJet
22 Oct - 25 Oct	easyJet
16 Oct - 21 Oct	easyJet
07 Oct - 12 Oct	easyJet
09 Oct - 12 Oct	easyJet
20 Oct - 24 Oct	Ryanair
11 Oct - 14 Oct	easyJet
20 Oct - 25 Oct	easyJet
22 Oct - 29 Oct	Ryanair
06 Oct - 11 Oct	easyJet
28 Oct - 15 Nov	Volotea
28 Oct - 11 Nov	Volotea
28 Oct - 08 Nov	Volotea
28 Oct - 07 Nov	Volotea
28 Oct - 14 Nov	Volotea
28 Oct - 04 Nov	Volotea
28 Oct - 17 Nov	Volotea
28 Oct - 01 Nov	ITA Airways
22 Oct - 11 Nov	Vueling Airlines
30 Oct - 06 Nov	easyJet

Also check the deals for one-way flights from Athens to Porto 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 Athens to Porto in October from $165

Return flights