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

Return flights

29 Apr - 06 May	Lufthansa
30 Apr - 10 May	Lufthansa
28 Apr - 05 May	Air France
26 Apr - 07 May	Singapore Airlines
23 Apr - 25 Apr	Singapore Airlines
29 Apr - 06 May	Finnair	direct
10 Apr - 17 Apr	Lufthansa
26 Apr - 07 May	Finnair	direct
28 Apr - 05 May	Finnair	direct
10 Apr - 17 Apr	Finnair	direct
23 Apr - 25 Apr	Finnair	direct

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

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 April from 733€

Return flights