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

Return flights

21 Apr - 26 Apr	China Southern
09 Apr - 16 Apr	China Southern
09 Apr - 14 Apr	China Southern
16 Apr - 21 Apr	China Southern
26 Apr - 03 May	China Southern
05 Apr - 12 Apr	China Southern
05 Apr - 14 Apr	China Southern
02 Apr - 15 Apr	Lufthansa
03 Apr - 13 Apr	Lufthansa
01 Apr - 09 Apr	KLM
01 Apr - 08 Apr	Lufthansa
20 Apr - 11 May	Finnair	direct
20 Apr - 13 May	Finnair	direct
27 Apr - 05 May	China Eastern
27 Apr - 13 May	Finnair	direct
28 Apr - 06 May	KLM
28 Apr - 08 May	Singapore Airlines
26 Apr - 03 May	Finnair	direct
29 Apr - 08 May	Scandinavian Airlines
30 Apr - 09 May	KLM

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 454€

Return flights