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

One-Way flights

24 Dec	Japan Airlines
12 Dec	Japan Airlines
03 Dec	Japan Airlines
17 Dec	Japan Airlines
31 Dec	Japan Airlines
30 Dec	Japan Airlines
05 Dec	Japan Airlines
07 Dec	Japan Airlines
20 Dec	Japan Airlines
14 Dec	Japan Airlines

Also check the deals for return 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.

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Cheapest one-way flights from Seoul to Lisbon in December from $748

One-Way flights