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

Return flights

02 Dec - 15 Dec	Ryanair
01 Dec - 07 Dec	Norwegian Air Sweden AOC
01 Dec - 14 Dec	Ryanair
09 Dec - 15 Dec	Finnair
05 Dec - 13 Dec	Norwegian Air Sweden AOC
06 Dec - 13 Dec	Ryanair
09 Dec - 24 Dec	Finnair
08 Dec - 20 Dec	Norwegian Air Sweden AOC
06 Dec - 27 Dec	Ryanair
07 Dec - 14 Dec	KLM
10 Dec - 16 Jan	KLM
12 Dec - 13 Jan	Air France
10 Dec - 16 Jan	Finnair	direct
12 Dec - 13 Jan	Finnair	direct
25 Dec - 15 Jan	KLM
25 Dec - 15 Jan	Finnair	direct
28 Dec - 08 Jan	Finnair	direct
29 Dec - 10 Jan	Norwegian Air Sweden AOC
31 Dec - 08 Jan	Finnair	direct
25 Dec - 07 Jan	Eurowings

Also check the deals for one-way flights from Helsinki 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 Helsinki to Seoul in December from 546€

Return flights