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

Return flights

02 Dec - 09 Dec	Lufthansa
04 Dec - 09 Dec	Lufthansa
05 Dec - 09 Dec	Lufthansa
05 Dec - 12 Dec	Air France
02 Dec - 12 Dec	Air France
04 Dec - 08 Dec	Lufthansa
16 Dec - 13 Jan	Lufthansa
04 Dec - 10 Dec	Air France
03 Dec - 09 Dec	Air France
06 Dec - 10 Dec	Air France
06 Dec - 12 Dec	Air France
21 Dec - 09 Jan	KLM
25 Dec - 16 Jan	Lufthansa
26 Dec - 08 Jan	Lufthansa
18 Dec - 09 Jan	Lufthansa
19 Dec - 09 Jan	Lufthansa
28 Dec - 06 Jan	Lufthansa
25 Dec - 05 Jan	Lufthansa
23 Dec - 06 Jan	KLM
22 Dec - 23 Jan	Lufthansa

Also check the deals for one-way flights from Seoul to Helsinki 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 Seoul to Helsinki in December from 497€

Return flights