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

Return flights

06 May - 13 May	Lufthansa
27 May - 03 Jun	Lufthansa
06 May - 18 May	Lufthansa
20 May - 26 May	Lufthansa
13 May - 20 May	Lufthansa
13 May - 10 Jun	Lufthansa
12 May - 19 May	Lufthansa
19 May - 26 May	Lufthansa
05 May - 12 May	Lufthansa
12 May - 26 May	Lufthansa
20 May - 27 May	Lufthansa
20 May - 03 Jun	Lufthansa
19 May - 27 May	Lufthansa
12 May - 02 Jun	Lufthansa
31 May - 10 Jun	LOT
26 May - 12 Jun	Lufthansa
22 May - 02 Jun	Lufthansa
23 May - 02 Jun	Lufthansa
31 May - 07 Jun	LOT
24 May - 03 Jun	Lufthansa

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 $662

Return flights