AirHint found the following cheapest return flights from Seoul (ICN) to Lisbon (LIS) in December 2026 (see full year).

Return flights

02 Dec - 13 Dec	Air France
11 Dec - 13 Dec	Air France
06 Dec - 13 Dec	Air France
09 Dec - 13 Dec	Air France
27 Dec - 31 Dec	KLM
02 Dec - 09 Dec	Air France
27 Dec - 06 Jan	KLM
29 Dec - 11 Jan	KLM
27 Dec - 05 Jan	KLM
29 Dec - 06 Jan	KLM
29 Dec - 05 Jan	KLM
05 Dec - 12 Dec	Air France
06 Dec - 12 Dec	Air France
08 Dec - 12 Dec	Air France
07 Dec - 12 Dec	Air France
26 Dec - 02 Jan	LOT
30 Dec - 06 Jan	Etihad Airways
23 Dec - 02 Jan	LOT
31 Dec - 07 Jan	KLM
30 Dec - 03 Jan	Lufthansa

Also check the deals for one-way 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 return flights from Seoul to Lisbon in December from 497€

Return flights