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

Return flights

20 May - 03 Jun	Iberia
12 May - 27 May	Etihad Airways
07 May - 20 May	Etihad Airways
19 May - 02 Jun	Etihad Airways
04 May - 25 May	LOT
10 May - 17 May	Iberia
29 May - 29 Jun	Air France
29 May - 03 Jun	Air France
03 May - 24 May	Finnair
08 May - 21 May	Finnair
03 May - 10 May	Finnair
29 May - 03 Jun	Korean Air	direct
20 May - 03 Jun	Korean Air	direct
03 May - 24 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 623€

Return flights