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

Return flights

21 Oct - 28 Oct	easyJet
29 Oct - 11 Nov	Ryanair
29 Oct - 01 Nov	Ryanair
15 Oct - 23 Oct	Ryanair
23 Oct - 30 Oct	Ryanair
02 Oct - 13 Oct	Ryanair
01 Oct - 08 Oct	Ryanair
15 Oct - 29 Oct	Ryanair
23 Oct - 01 Nov	Ryanair
21 Oct - 31 Oct	Ryanair
17 Oct - 25 Oct	Ryanair
15 Oct - 22 Oct	Ryanair
04 Oct - 11 Oct	easyJet
20 Oct - 01 Nov	KLM

Also check the deals for one-way flights from Porto to Seoul 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 Porto to Seoul in October from 536€

Return flights