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

Return flights

18 May - 25 May	Juneyao Airlines
01 May - 11 May	airBaltic
18 May - 18 Jun	Juneyao Airlines
04 May - 18 May	Scandinavian Airlines
17 May - 03 Jun	Japan Airlines
07 May - 21 May	Finnair
11 May - 01 Jun	Juneyao Airlines
11 May - 25 May	Juneyao Airlines
10 May - 24 May	Finnair
02 May - 18 May	Finnair
21 May - 28 May	Japan Airlines
03 May - 17 May	Finnair
11 May - 18 May	Finnair
18 May - 03 Jun	Finnair
18 May - 04 Jun	Finnair
25 May - 11 Jun	Finnair

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 508€

Return flights