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

Return flights

20 Aug - 27 Aug	Air China
12 Aug - 19 Aug	KLM
13 Aug - 19 Aug	Air France
28 Aug - 04 Sep	Etihad Airways
27 Aug - 03 Sep	Lufthansa
05 Aug - 19 Aug	KLM
11 Aug - 18 Aug	Lufthansa
27 Aug - 29 Aug	Etihad Airways
13 Aug - 20 Aug	China Southern
12 Aug - 20 Aug	KLM
14 Aug - 19 Aug	Lufthansa
05 Aug - 30 Sep	Lufthansa
05 Aug - 13 Aug	KLM
05 Aug - 04 Sep	KLM
31 Aug - 05 Sep	Etihad Airways
25 Aug - 01 Sep	Lufthansa
26 Aug - 02 Sep	Lufthansa
27 Aug - 02 Sep	Lufthansa
29 Aug - 02 Sep	Air France
29 Aug - 05 Sep	Air France

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

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 August from 677€

Return flights