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

One-Way flights

26 Aug	Juneyao Airlines
28 Aug	Juneyao Airlines
21 Aug	airBaltic
18 Aug	Norwegian Air Sweden AOC
17 Aug	Norwegian Air Sweden AOC
13 Aug	Norwegian Air Sweden AOC
11 Aug	Norwegian Air Sweden AOC
14 Aug	airBaltic
10 Aug	airBaltic
20 Aug	airBaltic

Also check the deals for return flights from Helsinki to Seoul 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 one-way flights from Helsinki to Seoul in August from 371€

One-Way flights