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

Return flights

13 Oct - 25 Oct	KLM
13 Oct - 21 Oct	KLM
23 Oct - 28 Oct	Air France
23 Oct - 26 Oct	Lufthansa
15 Oct - 22 Oct	Air France
13 Oct - 20 Oct	KLM
16 Oct - 21 Oct	KLM
20 Oct - 24 Oct	Air France
23 Oct - 26 Oct	Finnair	direct
11 Oct - 19 Oct	Finnair	direct
25 Oct - 01 Nov	Finnair	direct
31 Oct - 07 Nov	Finnair	direct
07 Oct - 01 Nov	Finnair	direct
06 Oct - 01 Nov	Etihad Airways
05 Oct - 01 Nov	Etihad Airways
05 Oct - 01 Nov	Finnair	direct
04 Oct - 01 Nov	Qatar Airways
06 Oct - 01 Nov	Finnair	direct
04 Oct - 01 Nov	Finnair	direct
01 Oct - 01 Nov	Singapore 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 716€

Return flights