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

Return flights

27 May - 03 Jun	Lufthansa
13 May - 19 May	Lufthansa
19 May - 26 May	Lufthansa
13 May - 24 May	Lufthansa
12 May - 20 May	Lufthansa
06 May - 20 May	Lufthansa
20 May - 03 Jun	Asiana Airlines
27 May - 31 May	LOT
20 May - 27 May	Lufthansa
06 May - 13 May	Lufthansa
13 May - 22 May	Lufthansa
11 May - 18 May	LOT
31 May - 10 Jun	LOT
27 May - 07 Jun	LOT
24 May - 02 Jun	Lufthansa
31 May - 07 Jun	LOT
24 May - 01 Jun	Lufthansa
28 May - 05 Jun	LOT
29 May - 07 Jun	Finnair
24 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 577€

Return flights