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

Return flights

21 Oct - 23 Oct	easyJet
09 Oct - 14 Oct	easyJet
02 Oct - 09 Oct	easyJet
02 Oct - 07 Oct	easyJet
09 Oct - 16 Oct	easyJet
16 Oct - 21 Oct	easyJet
01 Oct - 07 Oct	easyJet
01 Oct - 08 Oct	easyJet
08 Oct - 12 Oct	Volotea
15 Oct - 20 Oct	easyJet
21 Oct - 04 Nov	Vueling Airlines
14 Oct - 04 Nov	Vueling Airlines
30 Oct - 03 Nov	Ryanair
31 Oct - 03 Nov	Ryanair
15 Oct - 04 Nov	Vueling Airlines
21 Oct - 08 Nov	Vueling Airlines
25 Oct - 04 Nov	Vueling Airlines
24 Oct - 04 Nov	Vueling Airlines
26 Oct - 13 Nov	easyJet
30 Oct - 08 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 $153

Return flights