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

Return flights

01 Sep - 14 Sep	Turkish Airlines
01 Sep - 12 Sep	Turkish Airlines
07 Sep - 16 Sep	Juneyao Airlines
04 Sep - 17 Sep	Lufthansa
07 Sep - 16 Sep	Finnair	direct
01 Sep - 14 Sep	Finnair	direct
01 Sep - 12 Sep	Finnair	direct
04 Sep - 17 Sep	Finnair	direct
01 Sep - 21 Sep	Air France
01 Sep - 21 Sep	Finnair	direct
19 Sep - 03 Oct	Turkish Airlines
19 Sep - 03 Oct	Finnair	direct

Also check the deals for one-way flights from Helsinki to Seoul 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 Helsinki to Seoul in September from 623€

Return flights