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

Return flights

28 Oct - 05 Nov	Qatar Airways
23 Oct - 30 Oct	Qatar Airways
28 Oct - 05 Nov	Finnair	direct
16 Oct - 22 Oct	Qatar Airways
01 Oct - 15 Oct	Finnair	direct
01 Oct - 08 Oct	Finnair	direct
17 Oct - 24 Oct	Qatar Airways
17 Oct - 31 Oct	Qatar Airways
01 Oct - 30 Oct	Qatar Airways
19 Oct - 08 Nov	Qatar Airways
01 Oct - 30 Oct	Finnair	direct
23 Oct - 30 Oct	Finnair	direct
19 Oct - 08 Nov	Finnair	direct
02 Oct - 07 Oct	Finnair	direct
31 Oct - 15 Nov	Finnair	direct
06 Oct - 09 Nov	Finnair	direct
16 Oct - 02 Nov	Qatar Airways
16 Oct - 02 Nov	Finnair	direct
28 Oct - 11 Nov	Qatar Airways

Also check the deals for one-way flights from Helsinki to Seoul 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 Helsinki to Seoul in October from $745

Return flights