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

Return flights

20 May - 03 Jun	LOT
27 May - 17 Jun	LOT
13 May - 03 Jun	LOT
20 May - 10 Jun	LOT
26 May - 10 Jun	LOT
13 May - 31 May	LOT
13 May - 17 May	LOT
13 May - 24 May	LOT
20 May - 27 May	LOT
13 May - 22 May	LOT
13 May - 20 May	LOT
27 May - 31 May	LOT
13 May - 07 Jun	LOT
13 May - 05 Jun	LOT
18 May - 01 Jun	LOT
19 May - 02 Jun	LOT
26 May - 02 Jun	LOT
06 May - 13 May	SWISS
11 May - 19 May	LOT
11 May - 24 May	LOT

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 627€

Return flights