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

Return flights

14 Dec - 17 Dec	Air China
13 Dec - 16 Dec	China Eastern
04 Dec - 11 Dec	Air China
26 Dec - 31 Dec	China Southern
16 Dec - 24 Dec	Japan Airlines
05 Dec - 10 Dec	Japan Airlines
06 Dec - 10 Dec	Japan Airlines
03 Dec - 10 Dec	Japan Airlines
04 Dec - 10 Dec	Japan Airlines
19 Dec - 07 Jan	Japan Airlines
28 Dec - 07 Jan	Japan Airlines
30 Dec - 07 Jan	Japan Airlines
27 Dec - 10 Jan	Japan Airlines
25 Dec - 15 Jan	Japan Airlines
17 Dec - 24 Dec	Japan Airlines
29 Dec - 05 Jan	Japan Airlines
31 Dec - 06 Jan	Japan Airlines
26 Dec - 16 Jan	Japan Airlines
24 Dec - 01 Jan	Japan Airlines
25 Dec - 03 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 $633

Return flights