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

Return flights

02 Oct - 13 Oct	Ryanair
22 Oct - 01 Nov	Ryanair
23 Oct - 01 Nov	Ryanair
15 Oct - 29 Oct	Ryanair
15 Oct - 22 Oct	Ryanair
25 Oct - 30 Oct	easyJet
22 Oct - 02 Nov	Ryanair
27 Oct - 30 Oct	Ryanair
14 Oct - 25 Oct	Ryanair
01 Oct - 31 Oct	Lufthansa
25 Oct - 31 Oct	easyJet
03 Oct - 11 Oct	Air Europa
27 Oct - 02 Nov	Ryanair
23 Oct - 02 Nov	Air Europa
24 Oct - 02 Nov	Ryanair
18 Oct - 01 Nov	Ryanair
18 Oct - 25 Oct	Ryanair

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 604€

Return flights