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

Return flights

06 Dec - 11 Dec	Ryanair
06 Dec - 12 Dec	Ryanair
06 Dec - 13 Dec	Ryanair
11 Dec - 14 Dec	easyJet
13 Dec - 15 Dec	Vueling Airlines
12 Dec - 15 Dec	Vueling Airlines
11 Dec - 15 Dec	easyJet
17 Dec - 21 Dec	Ryanair
09 Dec - 11 Dec	Ryanair
06 Dec - 08 Dec	Ryanair
30 Dec - 06 Jan	Ryanair
18 Dec - 06 Jan	Vueling Airlines
31 Dec - 05 Jan	Ryanair
27 Dec - 02 Jan	Ryanair
22 Dec - 06 Jan	Vueling Airlines
29 Dec - 02 Jan	Ryanair
31 Dec - 04 Jan	Ryanair
30 Dec - 05 Jan	Ryanair
31 Dec - 03 Jan	Ryanair
30 Dec - 02 Jan	Ryanair

Also check the deals for one-way flights from Cagliari 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 Cagliari to Porto in December from 126€

Return flights