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

Return flights

20 Dec - 27 Dec	Japan Airlines
15 Dec - 25 Dec	Japan Airlines
13 Dec - 20 Dec	Japan Airlines
02 Dec - 11 Dec	Japan Airlines
15 Dec - 29 Dec	Japan Airlines
17 Dec - 04 Jan	Japan Airlines
31 Dec - 11 Jan	Japan Airlines
04 Dec - 13 Dec	Japan Airlines
23 Dec - 29 Dec	Japan Airlines
04 Dec - 11 Dec	Japan Airlines
21 Dec - 31 Dec	Japan Airlines
18 Dec - 25 Dec	Japan Airlines
16 Dec - 03 Jan	Japan Airlines
25 Dec - 03 Jan	Japan Airlines
24 Dec - 03 Jan	Japan Airlines
24 Dec - 04 Jan	Japan Airlines
25 Dec - 01 Jan	Japan Airlines
05 Dec - 16 Jan	Japan Airlines
14 Dec - 10 Jan	Japan Airlines
26 Dec - 04 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 1605€

Return flights