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

Return flights

01 Dec - 08 Dec	Japan Airlines
01 Dec - 11 Dec	Japan Airlines
25 Dec - 28 Dec	Japan Airlines
02 Dec - 10 Dec	Japan Airlines
11 Dec - 17 Dec	Japan Airlines
06 Dec - 14 Dec	Japan Airlines
04 Dec - 10 Dec	Japan Airlines
13 Dec - 21 Dec	Japan Airlines
18 Dec - 09 Jan	Japan Airlines
25 Dec - 03 Jan	Japan Airlines
19 Dec - 05 Jan	Japan Airlines
27 Dec - 04 Jan	Japan Airlines
19 Dec - 21 Dec	Japan Airlines
07 Dec - 14 Dec	Japan Airlines
19 Dec - 14 Jan	Japan Airlines
19 Dec - 11 Jan	Japan Airlines
26 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 $1595

Return flights