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

Return flights

01 Dec - 10 Dec	easyJet
01 Dec - 07 Dec	easyJet
05 Dec - 12 Dec	easyJet
04 Dec - 11 Dec	Wizz Air Malta
12 Dec - 19 Dec	easyJet
06 Dec - 17 Dec	LOT
15 Dec - 23 Dec	LOT
07 Dec - 14 Dec	LOT
30 Dec - 10 Jan	easyJet
03 Dec - 12 Dec	Lufthansa
17 Dec - 21 Dec	TAP
31 Dec - 29 Jan	KLM
24 Dec - 04 Jan	Finnair
25 Dec - 06 Jan	Finnair
27 Dec - 06 Jan	Finnair
20 Dec - 01 Jan	Finnair
29 Dec - 01 Jan	Turkish Airlines
28 Dec - 04 Jan	Finnair
27 Dec - 17 Jan	Finnair
19 Dec - 04 Jan	Ryanair

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 527€

Return flights