AirHint found the following cheapest return flights from Athens (ATH) to Porto (OPO) in August 2026 (see full year).

Return flights

25 Aug - 31 Aug	Aegean Airlines	direct
11 Aug - 21 Aug	Aegean Airlines	direct
07 Aug - 10 Aug	Vueling Airlines
02 Aug - 03 Aug	Vueling Airlines
02 Aug - 10 Aug	Vueling Airlines
01 Aug - 03 Aug	Vueling Airlines
17 Aug - 27 Aug	Vueling Airlines
01 Aug - 10 Aug	Vueling Airlines
02 Aug - 02 Aug	Vueling Airlines
01 Aug - 02 Aug	Vueling Airlines

Also check the deals for one-way flights from Athens to Porto in August.

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 August from 161€

Return flights