AirHint found the following cheapest return flights from Seoul (ICN) to Helsinki (HEL) in September 2026 (see full year).

Return flights

09 Sep - 14 Sep	Lufthansa
07 Sep - 16 Sep	Lufthansa
07 Sep - 15 Sep	Lufthansa
01 Sep - 11 Sep	Lufthansa
17 Sep - 27 Sep	Lufthansa
07 Sep - 16 Sep	Finnair	direct
07 Sep - 15 Sep	Finnair	direct
20 Sep - 24 Sep	Etihad Airways
01 Sep - 11 Sep	Finnair	direct
09 Sep - 14 Sep	Finnair	direct
25 Sep - 09 Oct	Vietnam Airlines
25 Sep - 09 Oct	Finnair	direct

Also check the deals for one-way flights from Seoul to Helsinki in September.

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 September from 560€

Return flights