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

Return flights

13 May - 17 May	Air France
13 May - 03 Jun	Air France
15 May - 24 May	Air France
13 May - 23 May	Air France
23 May - 29 May	Air France
15 May - 29 May	Air France
13 May - 20 May	Air France
25 May - 29 May	KLM
06 May - 17 May	Air France
27 May - 07 Jun	Etihad Airways
08 May - 27 May	Air France
26 May - 07 Jun	Etihad Airways
13 May - 25 May	Etihad Airways
27 May - 10 Jun	Etihad Airways
26 May - 03 Jun	Etihad Airways
23 May - 01 Jun	Air France
30 May - 07 Jun	Air France
25 May - 06 Jun	LOT
22 May - 01 Jun	Finnair
22 May - 02 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 607€

Return flights