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

Return flights

03 May - 13 May	Turkish Airlines
01 May - 11 May	Turkish Airlines
20 May - 17 Jun	Lufthansa
18 May - 01 Jun	Turkish Airlines
27 May - 08 Jun	Finnair	direct
18 May - 01 Jun	Finnair	direct
01 May - 19 Jun	Scandinavian Airlines
20 May - 17 Jun	Finnair	direct
01 May - 11 May	Finnair	direct
01 May - 19 Jun	Finnair	direct
03 May - 13 May	Finnair	direct

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

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 May from 629€

Return flights