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

Return flights

01 Dec - 14 Dec	Lufthansa
08 Dec - 14 Dec	Turkish Airlines
07 Dec - 14 Dec	Air France
07 Dec - 14 Dec	Finnair	direct
29 Dec - 08 Jan	Finnair	direct
23 Dec - 08 Jan	Lufthansa
22 Dec - 30 Dec	Air France
13 Dec - 04 Jan	Finnair	direct
22 Dec - 29 Dec	Finnair	direct
22 Dec - 30 Dec	Finnair	direct
14 Dec - 03 Jan	airBaltic
19 Dec - 23 Dec	Finnair	direct
14 Dec - 03 Jan	Finnair	direct
23 Dec - 03 Jan	Lufthansa
23 Dec - 03 Jan	Finnair	direct
20 Dec - 03 Jan	Finnair	direct

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 610€

Return flights