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

Return flights

03 Oct - 16 Oct	Lufthansa
01 Oct - 15 Oct	Air France
30 Oct - 03 Nov	Turkish Airlines
23 Oct - 30 Oct	Qatar Airways
28 Oct - 10 Nov	Finnair	direct
17 Oct - 25 Oct	Norwegian Air Sweden AOC
03 Oct - 16 Oct	Finnair	direct
16 Oct - 21 Nov	Scandinavian Airlines
01 Oct - 15 Oct	Finnair	direct
15 Oct - 20 Nov	Qatar Airways
30 Oct - 03 Nov	Finnair	direct
15 Oct - 20 Nov	Finnair	direct
16 Oct - 21 Nov	Finnair	direct
13 Oct - 23 Oct	KLM
13 Oct - 21 Nov	KLM
13 Oct - 23 Oct	Finnair	direct
13 Oct - 21 Nov	Finnair	direct

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 634€

Return flights