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

Return flights

02 Dec - 29 Dec	Ryanair
01 Dec - 16 Dec	Ryanair
01 Dec - 12 Dec	Ryanair
01 Dec - 13 Dec	Ryanair
01 Dec - 09 Dec	easyJet
06 Dec - 13 Dec	Ryanair
01 Dec - 14 Dec	Ryanair
01 Dec - 08 Dec	easyJet
25 Dec - 29 Dec	easyJet
01 Dec - 10 Dec	Lufthansa
14 Dec - 07 Jan	Wizz Air
30 Dec - 11 Jan	Iberia
28 Dec - 07 Jan	Wizz Air
29 Dec - 07 Jan	Wizz Air
30 Dec - 07 Jan	Turkish Airlines
21 Dec - 02 Jan	Pegasus Airlines
31 Dec - 05 Jan	Iberia
29 Dec - 06 Jan	Air Europa
15 Dec - 07 Jan	Lufthansa
26 Dec - 05 Jan	Iberia

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.

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Cheapest return flights from Lisbon to Seoul in December from 529€

Return flights