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

Return flights

08 Dec - 13 Dec	Ryanair
02 Dec - 16 Dec	Ryanair
02 Dec - 08 Dec	Ryanair
03 Dec - 16 Dec	Ryanair
02 Dec - 09 Dec	Ryanair
01 Dec - 07 Dec	Ryanair
03 Dec - 08 Dec	Ryanair
01 Dec - 10 Dec	Ryanair
01 Dec - 17 Dec	Ryanair
03 Dec - 15 Dec	Ryanair
12 Dec - 12 Jan	Ryanair
15 Dec - 15 Jan	Ryanair
23 Dec - 19 Jan	Scandinavian Airlines
23 Dec - 16 Jan	Scandinavian Airlines
24 Dec - 16 Jan	KLM
01 Dec - 06 Jan	Ryanair
24 Dec - 14 Jan	KLM
15 Dec - 17 Jan	Ryanair
24 Dec - 15 Jan	KLM
11 Dec - 12 Jan	Ryanair

Also check the deals for one-way flights from Dublin 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 Dublin to Seoul in December from 458€

Return flights