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

Return flights

10 May - 24 May	Japan Airlines
17 May - 27 May	Japan Airlines
17 May - 24 May	Japan Airlines
22 May - 02 Jun	Japan Airlines
24 May - 03 Jun	Japan Airlines
20 May - 31 May	Japan Airlines
16 May - 23 May	Japan Airlines
08 May - 16 May	Japan Airlines
30 May - 06 Jun	Japan Airlines
30 May - 07 Jun	Japan Airlines
29 May - 05 Jun	Japan Airlines
29 May - 06 Jun	Japan Airlines
30 May - 05 Jun	Japan Airlines
27 May - 31 May	Japan Airlines
08 May - 17 May	Japan Airlines
26 May - 30 May	Japan Airlines
15 May - 24 May	Japan Airlines
24 May - 01 Jun	Japan Airlines

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 1802€

Return flights