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

Return flights

06 May - 20 May	Iberia
13 May - 03 Jun	Iberia
30 May - 13 Jun	LOT
31 May - 14 Jun	Iberia
31 May - 07 Jun	Iberia
01 May - 15 May	KLM
21 May - 30 May	Air France
05 May - 19 May	Air France
22 May - 31 May	Finnair
02 May - 10 May	Finnair
01 May - 15 May	Korean Air	direct

Also check the deals for one-way flights from Lisbon 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 Lisbon to Seoul in May from $719

Return flights