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

Return flights

18 May - 25 May	Juneyao Airlines
01 May - 18 May	Pegasus Airlines
17 May - 01 Jun	Ryanair
18 May - 18 Jun	Finnair
23 May - 01 Jun	Finnair
05 May - 19 May	Ryanair
02 May - 18 May	Ryanair
01 May - 11 May	Pegasus Airlines
03 May - 18 May	Ryanair
26 May - 09 Jun	China Southern
04 May - 18 May	Finnair
18 May - 03 Jun	Turkish Airlines
11 May - 01 Jun	Lufthansa
12 May - 20 May	Finnair
16 May - 27 May	Pegasus Airlines
07 May - 21 May	Finnair
24 May - 06 Jun	Finnair
18 May - 04 Jun	Finnair
25 May - 11 Jun	Finnair
18 May - 03 Jun	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 507€

Return flights