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

Return flights

13 Oct - 21 Oct	Japan Airlines
08 Oct - 30 Oct	Japan Airlines
11 Oct - 14 Oct	Japan Airlines
08 Oct - 14 Oct	Japan Airlines
09 Oct - 16 Oct	Japan Airlines
23 Oct - 26 Oct	Japan Airlines
27 Oct - 30 Oct	Japan Airlines
27 Oct - 31 Oct	Japan Airlines
20 Oct - 26 Oct	Japan Airlines
06 Oct - 16 Oct	Japan Airlines
25 Oct - 03 Nov	Japan Airlines

Also check the deals for one-way flights from Seoul to Helsinki in October.

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 October from 1186€

Return flights