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

Return flights

01 Dec - 15 Dec	Vueling Airlines
01 Dec - 08 Dec	Vueling Airlines
13 Dec - 15 Dec	Vueling Airlines
01 Dec - 19 Dec	Vueling Airlines
05 Dec - 15 Dec	Ryanair
07 Dec - 15 Dec	Vueling Airlines
13 Dec - 19 Dec	Vueling Airlines
01 Dec - 17 Dec	Vueling Airlines
06 Dec - 08 Dec	Ryanair
01 Dec - 07 Dec	Vueling Airlines
07 Dec - 09 Jan	Ryanair
17 Dec - 09 Jan	Ryanair
29 Dec - 16 Jan	Ryanair	direct
29 Dec - 12 Jan	Ryanair	direct
29 Dec - 13 Jan	Ryanair
26 Dec - 16 Jan	Ryanair	direct
26 Dec - 12 Jan	Ryanair	direct
26 Dec - 13 Jan	Ryanair
29 Dec - 15 Jan	Ryanair
29 Dec - 09 Jan	Ryanair

Also check the deals for one-way flights from Copenhagen 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 Copenhagen to Porto in December from $133

Return flights