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

Return flights

02 Dec - 16 Dec	Lufthansa
04 Dec - 16 Dec	Lufthansa
02 Dec - 15 Dec	Lufthansa
04 Dec - 31 Jan	Lufthansa
02 Dec - 13 Dec	Lufthansa
01 Dec - 14 Dec	Lufthansa
01 Dec - 07 Dec	Ryanair
01 Dec - 08 Dec	Ryanair
30 Dec - 23 Jan	Lufthansa
01 Dec - 17 Dec	Lufthansa
01 Dec - 16 Dec	Lufthansa
07 Dec - 17 Dec	Lufthansa
16 Dec - 21 Jan	Lufthansa
16 Dec - 20 Jan	Lufthansa
30 Dec - 08 Jan	Lufthansa
12 Dec - 10 Jan	KLM
26 Dec - 09 Jan	Aer Lingus
28 Dec - 14 Jan	Scandinavian Airlines
30 Dec - 10 Jan	Lufthansa
28 Dec - 08 Jan	Aer Lingus

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 $560

Return flights