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

Return flights

13 Dec - 14 Dec	Lufthansa
17 Dec - 31 Dec	Lufthansa
17 Dec - 06 Jan	Lufthansa
01 Dec - 08 Dec	Lufthansa
07 Dec - 14 Dec	Lufthansa
02 Dec - 09 Dec	Lufthansa
05 Dec - 14 Dec	Lufthansa
02 Dec - 07 Dec	Lufthansa
05 Dec - 10 Dec	Lufthansa
04 Dec - 07 Dec	Lufthansa
01 Dec - 10 Dec	Lufthansa
29 Dec - 05 Jan	Lufthansa
29 Dec - 07 Jan	Lufthansa
29 Dec - 08 Jan	Lufthansa
29 Dec - 09 Jan	Lufthansa
26 Dec - 01 Jan	Lufthansa
26 Dec - 09 Jan	Lufthansa
30 Dec - 09 Jan	Finnair
30 Dec - 08 Jan	Finnair
25 Dec - 06 Jan	KLM

Also check the deals for one-way flights from Seoul to Barcelona 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 Barcelona in December from $542

Return flights