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

Return flights

07 Oct - 23 Oct	Ryanair	direct
19 Oct - 23 Oct	Vueling Airlines
07 Oct - 16 Oct	Ryanair	direct
07 Oct - 14 Oct	Ryanair	direct
28 Oct - 30 Oct	Ryanair	direct
21 Oct - 23 Oct	Ryanair	direct
05 Oct - 23 Oct	Vueling Airlines
18 Oct - 23 Oct	Ryanair	direct
05 Oct - 16 Oct	Vueling Airlines
14 Oct - 23 Oct	Ryanair	direct
28 Oct - 01 Nov	Ryanair
30 Oct - 01 Nov	Ryanair
30 Oct - 02 Nov	Ryanair
28 Oct - 02 Nov	Ryanair
31 Oct - 03 Nov	Vueling Airlines

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 $100

Return flights