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

Return flights

09 Aug - 14 Aug	TAP
26 Aug - 03 Sep	Iberia
25 Aug - 01 Sep	Vueling Airlines
09 Aug - 17 Aug	TAP
26 Aug - 01 Sep	Iberia
19 Aug - 24 Aug	TAP
01 Aug - 13 Aug	TAP
02 Aug - 13 Aug	TAP
14 Aug - 23 Aug	TAP
13 Aug - 21 Aug	TAP
14 Aug - 20 Aug	TAP
02 Aug - 06 Aug	TAP
01 Aug - 07 Aug	TAP
30 Aug - 05 Sep	TAP
30 Aug - 08 Sep	TAP
26 Aug - 15 Sep	Vueling Airlines
25 Aug - 15 Sep	Vueling Airlines
25 Aug - 03 Sep	Vueling Airlines
25 Aug - 10 Sep	Vueling Airlines
28 Aug - 15 Sep	Volotea

Also check the deals for one-way flights from Porto to Athens 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 Porto to Athens in August from $257

Return flights