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

Return flights

04 Jul - 08 Jul	Ryanair
04 Jul - 12 Jul	Ryanair
08 Jul - 14 Jul	KLM
15 Jul - 29 Jul	Ryanair
10 Jul - 17 Jul	Ryanair
17 Jul - 31 Jul	Air Serbia
08 Jul - 12 Jul	KLM
04 Jul - 04 Jul	Ryanair
04 Jul - 09 Jul	Ryanair
17 Jul - 29 Jul	Air Serbia
24 Jul - 02 Aug	KLM
27 Jul - 05 Aug	Aegean Airlines
28 Jul - 01 Aug	Wizz Air Malta
19 Jul - 02 Aug	Ryanair
27 Jul - 03 Aug	Ryanair
17 Jul - 12 Aug	Air Serbia
27 Jul - 02 Aug	Air Europa
29 Jul - 05 Aug	Ryanair
30 Jul - 06 Aug	Ryanair
29 Jul - 09 Aug	Ryanair

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

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 July from 206€

Return flights