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

Return flights

11 Dec - 14 Dec	easyJet
04 Dec - 07 Dec	easyJet
03 Dec - 10 Dec	easyJet
10 Dec - 14 Dec	easyJet
11 Dec - 16 Dec	easyJet
04 Dec - 09 Dec	easyJet
10 Dec - 13 Dec	easyJet
06 Dec - 14 Dec	Ryanair
10 Dec - 15 Dec	easyJet
06 Dec - 10 Dec	Ryanair
12 Dec - 09 Jan	Ryanair
20 Dec - 11 Jan	Vueling Airlines
30 Dec - 04 Jan	Ryanair
31 Dec - 07 Jan	Ryanair
19 Dec - 13 Jan	Ryanair
25 Dec - 13 Jan	Vueling Airlines
30 Dec - 13 Jan	Volotea
29 Dec - 02 Jan	Air Serbia
26 Dec - 02 Jan	Air Serbia
28 Dec - 05 Jan	Air Serbia

Also check the deals for one-way flights from Athens to Porto 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 Athens to Porto in December from 103€

Return flights