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

Return flights

14 May - 21 May	Air France
26 May - 02 Jun	Air France
19 May - 26 May	LOT
27 May - 31 May	LOT
25 May - 01 Jun	LOT
25 May - 05 Jun	LOT
27 May - 07 Jun	LOT
27 May - 03 Jun	LOT
25 May - 29 May	KLM
12 May - 19 May	LOT
06 May - 15 May	Finnair
20 May - 27 May	Finnair
13 May - 20 May	Finnair
15 May - 24 May	Etihad Airways
22 May - 28 May	Finnair
30 May - 07 Jun	LOT
30 May - 08 Jun	LOT
30 May - 06 Jun	LOT
29 May - 07 Jun	Finnair
22 May - 03 Jun	Finnair

Also check the deals for one-way flights from Seoul to Lisbon 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 Seoul to Lisbon in May from $716

Return flights