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

Return flights

31 Dec - 25 Jan	Ryanair
31 Dec - 30 Jan	Ryanair
31 Dec - 31 Jan	Ryanair
30 Dec - 14 Jan	Ryanair
31 Dec - 14 Jan	Vueling Airlines
28 Dec - 23 Jan	Ryanair
17 Dec - 30 Dec	Pegasus Airlines
28 Dec - 28 Jan	Ryanair
21 Dec - 07 Jan	Pegasus Airlines
28 Dec - 07 Jan	Ryanair
21 Dec - 31 Dec	Pegasus Airlines
15 Dec - 07 Jan	Ryanair
16 Dec - 29 Dec	Air France
16 Dec - 24 Dec	Air France
17 Dec - 21 Dec	Ryanair
19 Dec - 26 Dec	Turkish Airlines
22 Dec - 30 Dec	Turkish Airlines
23 Dec - 31 Dec	Turkish Airlines
26 Dec - 31 Dec	KLM
15 Dec - 22 Dec	Air France

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

Cheap car rent in Seoul

Cheapest return flights from Lisbon to Seoul in December from $592

Return flights