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

Return flights

30 Aug - 02 Sep	Ryanair
27 Aug - 11 Sep	Vueling Airlines
25 Aug - 11 Sep	Vueling Airlines
27 Aug - 16 Sep	Vueling Airlines
02 Aug - 05 Aug	Ryanair
02 Aug - 14 Aug	Ryanair	direct
30 Aug - 04 Sep	Ryanair
19 Aug - 26 Aug	Ryanair
02 Aug - 06 Aug	Ryanair
27 Aug - 13 Sep	Vueling Airlines
25 Aug - 13 Sep	Vueling Airlines
27 Aug - 17 Sep	Vueling Airlines
02 Aug - 09 Aug	Ryanair
30 Aug - 06 Sep	Ryanair
31 Aug - 11 Sep	Vueling Airlines
02 Aug - 08 Aug	Ryanair
02 Aug - 13 Aug	Ryanair
25 Aug - 27 Aug	Vueling Airlines
02 Aug - 10 Aug	Ryanair
02 Aug - 20 Aug	Ryanair

Also check the deals for one-way flights from Cagliari to Porto in August.

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 August from 181€

Return flights