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

Return flights

11 Oct - 18 Oct	Lufthansa
13 Oct - 24 Oct	Lufthansa
15 Oct - 22 Oct	Lufthansa
11 Oct - 17 Oct	Lufthansa
14 Oct - 31 Oct	Lufthansa
24 Oct - 03 Nov	Lufthansa
10 Oct - 17 Oct	Lufthansa
18 Oct - 24 Oct	Lufthansa
13 Oct - 18 Oct	Lufthansa
13 Oct - 21 Oct	Lufthansa
28 Oct - 04 Nov	Lufthansa
23 Oct - 26 Oct	Lufthansa
29 Oct - 02 Nov	Lufthansa
24 Oct - 01 Nov	Lufthansa
30 Oct - 06 Nov	Lufthansa
29 Oct - 02 Nov	Finnair	direct
24 Oct - 03 Nov	Finnair	direct
24 Oct - 01 Nov	Finnair	direct

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 $561

Return flights