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

Return flights

21 Oct - 23 Oct	Ryanair	direct
14 Oct - 18 Oct	Vueling Airlines
23 Oct - 25 Oct	Ryanair	direct
21 Oct - 25 Oct	Ryanair	direct
23 Oct - 28 Oct	Ryanair	direct
23 Oct - 30 Oct	Ryanair	direct
21 Oct - 28 Oct	Ryanair	direct
21 Oct - 30 Oct	Ryanair	direct
14 Oct - 21 Oct	Vueling Airlines
16 Oct - 23 Oct	Ryanair	direct

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

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 October from $94

Return flights