AirHint found the following cheapest return flights from Cagliari (CAG) to Porto (OPO) in May 2026 (see full year).

Return flights

22 May - 10 Jun	Ryanair
25 May - 10 Jun	Ryanair
05 May - 08 May	Vueling Airlines
29 May - 10 Jun	Ryanair
13 May - 15 May	Ryanair	direct
08 May - 13 May	Ryanair
08 May - 15 May	Ryanair	direct
05 May - 08 May	Ryanair	direct
06 May - 08 May	Ryanair	direct
15 May - 26 May	Ryanair
18 May - 26 May	Ryanair
13 May - 26 May	Ryanair
20 May - 26 May	Ryanair
29 May - 16 Jun	Ryanair
23 May - 10 Jun	Vueling Airlines
20 May - 08 Jun	Ryanair
22 May - 08 Jun	Ryanair
25 May - 08 Jun	Ryanair
29 May - 17 Jun	Ryanair	direct
29 May - 16 Jun	Ryanair	direct

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

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 May from $126

Return flights