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

Return flights

06 Oct - 11 Oct	Juneyao Airlines
29 Oct - 04 Nov	Japan Airlines
13 Oct - 16 Oct	Japan Airlines
10 Oct - 28 Oct	Japan Airlines
13 Oct - 25 Oct	Japan Airlines
14 Oct - 17 Oct	Japan Airlines
09 Oct - 16 Oct	Japan Airlines
02 Oct - 09 Oct	Japan Airlines
23 Oct - 26 Oct	Japan Airlines
03 Oct - 14 Oct	Japan Airlines
14 Oct - 21 Oct	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 1759€

Return flights