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

Return flights

27 Apr - 07 May	Ryanair
22 Apr - 06 May	Finnair
25 Apr - 05 May	Finnair	direct
26 Apr - 03 May	Turkish Airlines
27 Apr - 06 May	Turkish Airlines
02 Apr - 21 Apr	Finnair
07 Apr - 14 Apr	Finnair
17 Apr - 22 Apr	Finnair	direct
06 Apr - 20 Apr	Finnair
24 Apr - 28 Apr	Finnair	direct
07 Apr - 27 Apr	Norwegian Air Sweden AOC
17 Apr - 25 Apr	Finnair	direct
26 Apr - 04 May	Finnair	direct
07 Apr - 27 Apr	Finnair	direct
20 Apr - 30 Apr	Turkish Airlines
07 Apr - 14 Apr	Finnair	direct
26 Apr - 03 May	Finnair	direct

Also check the deals for one-way flights from Helsinki to Seoul 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 Helsinki to Seoul in April from $750

Return flights