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	LOT
13 May - 19 May	LOT
18 May - 26 May	LOT
13 May - 20 May	LOT
13 May - 24 May	LOT
19 May - 09 Jun	LOT
19 May - 10 Jun	LOT
11 May - 17 May	LOT
11 May - 18 May	LOT
20 May - 30 May	LOT
20 May - 26 May	LOT
17 May - 26 May	Etihad Airways
20 May - 10 Jun	LOT
26 May - 16 Jun	Etihad Airways
31 May - 14 Jun	Etihad Airways
27 May - 14 Jun	Etihad Airways
20 May - 02 Jun	Lufthansa
27 May - 17 Jun	Lufthansa
26 May - 17 Jun	Lufthansa
27 May - 04 Jun	Etihad Airways

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 $733

Return flights