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

Return flights

05 Dec - 08 Dec	Iberia
01 Dec - 14 Dec	Ryanair
05 Dec - 13 Dec	Iberia
01 Dec - 10 Dec	Ryanair
01 Dec - 09 Dec	Ryanair
11 Dec - 14 Dec	easyJet
11 Dec - 25 Dec	Ryanair
11 Dec - 18 Dec	easyJet
14 Dec - 18 Dec	Ryanair
23 Dec - 23 Jan	Ryanair
01 Dec - 31 Jan	Lufthansa
22 Dec - 29 Dec	Turkish Airlines
27 Dec - 05 Jan	Ryanair
20 Dec - 04 Jan	Ryanair
30 Dec - 05 Jan	Ryanair
29 Dec - 04 Jan	Ryanair

Also check the deals for one-way flights from Porto to Seoul in December.

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 December from 466€

Return flights