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

Return flights

21 Dec - 30 Dec	Ryanair
14 Dec - 15 Dec	Ryanair
13 Dec - 17 Dec	Air Europa
13 Dec - 15 Dec	Iberia
12 Dec - 15 Dec	Ryanair
23 Dec - 30 Dec	Ryanair
14 Dec - 16 Dec	Ryanair
17 Dec - 20 Dec	Ryanair
24 Dec - 30 Dec	Ryanair
23 Dec - 31 Dec	Ryanair
20 Dec - 08 Jan	Vueling Airlines
30 Dec - 06 Jan	Ryanair
20 Dec - 06 Jan	Vueling Airlines
17 Dec - 06 Jan	Vueling Airlines
21 Dec - 08 Jan	Vueling Airlines
22 Dec - 08 Jan	Vueling Airlines
21 Dec - 06 Jan	Vueling Airlines
22 Dec - 06 Jan	Vueling Airlines
24 Dec - 08 Jan	Vueling Airlines
31 Dec - 04 Jan	Ryanair

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

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 December from $210

Return flights