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

Return flights

07 Oct - 13 Oct	easyJet
07 Oct - 11 Oct	easyJet
16 Oct - 23 Oct	easyJet
14 Oct - 18 Oct	easyJet
15 Oct - 18 Oct	easyJet
02 Oct - 11 Oct	easyJet
24 Oct - 31 Oct	Ryanair
14 Oct - 16 Oct	easyJet
02 Oct - 09 Oct	easyJet
02 Oct - 08 Oct	Ryanair
15 Oct - 04 Nov	Vueling Airlines
21 Oct - 04 Nov	Vueling Airlines
14 Oct - 04 Nov	Vueling Airlines
30 Oct - 05 Nov	easyJet
30 Oct - 04 Nov	Ryanair
30 Oct - 02 Nov	Ryanair
22 Oct - 04 Nov	Vueling Airlines
15 Oct - 02 Nov	Vueling Airlines
15 Oct - 01 Nov	Vueling Airlines
30 Oct - 01 Nov	Ryanair

Also check the deals for one-way flights from Porto to Athens 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 Athens in October from $164

Return flights