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

Return flights

18 Oct - 22 Oct	Ryanair	direct
04 Oct - 22 Oct	Ryanair	direct
08 Oct - 22 Oct	Ryanair	direct
15 Oct - 22 Oct	Ryanair	direct
11 Oct - 22 Oct	Ryanair	direct
14 Oct - 18 Oct	easyJet
04 Oct - 08 Oct	Ryanair
16 Oct - 20 Oct	easyJet
15 Oct - 17 Oct	easyJet
08 Oct - 16 Oct	Ryanair

Also check the deals for one-way flights from Belfast 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 Belfast to Porto in October from 92€

Return flights