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

Return flights

28 May - 02 Jun	Air France
19 May - 26 May	Lufthansa
27 May - 31 May	LOT
19 May - 30 May	LOT
27 May - 03 Jun	LOT
25 May - 23 Jun	LOT
12 May - 20 May	Lufthansa
12 May - 19 May	Lufthansa
20 May - 26 May	Lufthansa
18 May - 29 May	LOT
11 May - 18 May	SWISS
28 May - 05 Jun	Air France
20 May - 27 May	Lufthansa
20 May - 31 May	Lufthansa
30 May - 07 Jun	Air France
06 May - 04 Jun	Finnair
26 May - 04 Jun	Air France
20 May - 02 Jun	Air France
29 May - 05 Jun	Finnair
23 May - 01 Jun	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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon

Cheapest return flights from Seoul to Lisbon in May from 620€

Return flights