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

Return flights

12 May - 25 May	LOT
17 May - 27 May	LOT
31 May - 10 Jun	LOT
30 May - 14 Jun	Vueling Airlines
11 May - 21 May	Lufthansa
07 May - 20 May	Lufthansa
10 May - 20 May	Lufthansa
12 May - 26 May	Lufthansa
31 May - 14 Jun	LOT
06 May - 17 May	Finnair
13 May - 24 May	Finnair
24 May - 07 Jun	LOT
24 May - 31 May	LOT
18 May - 25 May	Finnair
31 May - 06 Jun	Air Canada

Also check the deals for one-way flights from Lisbon to Seoul 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 Lisbon to Seoul in May from 628€

Return flights