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

Return flights

03 Dec - 07 Dec	Japan Airlines
01 Dec - 02 Dec	Japan Airlines
29 Dec - 12 Jan	Japan Airlines
24 Dec - 29 Dec	Japan Airlines
24 Dec - 31 Dec	Japan Airlines
20 Dec - 06 Jan	Japan Airlines
01 Dec - 11 Dec	Japan Airlines
31 Dec - 04 Jan	Japan Airlines
22 Dec - 06 Jan	Japan Airlines
31 Dec - 07 Jan	Japan Airlines
17 Dec - 10 Jan	Japan Airlines
17 Dec - 26 Dec	Japan Airlines
09 Dec - 14 Dec	Japan Airlines
27 Dec - 12 Jan	Japan Airlines
18 Dec - 25 Dec	Japan Airlines
21 Dec - 09 Jan	Japan Airlines
24 Dec - 27 Dec	Japan Airlines
05 Dec - 07 Dec	Japan Airlines
23 Dec - 06 Jan	Japan Airlines
27 Dec - 01 Jan	Japan Airlines

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 896€

Return flights