AirHint found the following cheapest return flights from Seoul (GMP) to Lisbon (LIS) in December 2025 (see full year).

Return flights

11 Dec - 16 Dec	Air China
09 Dec - 15 Dec	Air China
03 Dec - 09 Dec	Air China
12 Dec - 17 Dec	Air China
10 Dec - 12 Dec	Air China
10 Dec - 09 Jan	Japan Airlines
17 Dec - 28 Dec	Japan Airlines
29 Dec - 12 Jan	Japan Airlines
29 Dec - 13 Jan	Japan Airlines
30 Dec - 09 Jan	Japan Airlines
10 Dec - 21 Dec	Japan Airlines
31 Dec - 12 Jan	Japan Airlines
31 Dec - 09 Jan	Japan Airlines
28 Dec - 10 Jan	Japan Airlines
30 Dec - 08 Jan	Japan Airlines
31 Dec - 10 Jan	Japan Airlines
21 Dec - 28 Dec	Japan Airlines
20 Dec - 28 Dec	Japan Airlines
22 Dec - 28 Dec	Japan Airlines
29 Dec - 06 Jan	Japan Airlines

Also check the deals for one-way flights from Seoul to Lisbon in December.

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 December from 451€

Return flights