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

Return flights

02 Dec - 06 Dec	Ryanair
10 Dec - 17 Dec	easyJet
02 Dec - 14 Dec	TAP
01 Dec - 10 Dec	Ryanair
06 Dec - 14 Dec	Ryanair
01 Dec - 14 Dec	Ryanair
01 Dec - 12 Dec	Ryanair
01 Dec - 13 Dec	Ryanair
10 Dec - 15 Dec	Wizz Air Malta
03 Dec - 10 Dec	Ryanair
28 Dec - 18 Jan	Ryanair
15 Dec - 07 Jan	Ryanair
28 Dec - 07 Jan	Ryanair
14 Dec - 07 Jan	Wizz Air
28 Dec - 28 Jan	Finnair
28 Dec - 04 Jan	easyJet
25 Dec - 02 Jan	Pegasus Airlines
31 Dec - 09 Jan	Pegasus Airlines
24 Dec - 06 Jan	easyJet
23 Dec - 07 Jan	Pegasus Airlines

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 462€

Return flights