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
02 Dec - 12 Dec	Lufthansa
03 Dec - 07 Dec	Air France
16 Dec - 21 Jan	Lufthansa
31 Dec - 12 Jan	Lufthansa
15 Dec - 20 Jan	Lufthansa
16 Dec - 20 Jan	Lufthansa
11 Dec - 07 Jan	Lufthansa
16 Dec - 30 Dec	Lufthansa
15 Dec - 29 Dec	Lufthansa
12 Dec - 01 Jan	Turkish Airlines
15 Dec - 05 Jan	Lufthansa
18 Dec - 06 Jan	Lufthansa
18 Dec - 01 Jan	Lufthansa
22 Dec - 02 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 $576

Return flights