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

Return flights

08 Dec - 14 Dec	Air China
13 Dec - 09 Jan	Air China
29 Dec - 09 Jan	Air China
02 Dec - 05 Dec	Air China
02 Dec - 13 Dec	Air China
02 Dec - 14 Dec	Air China
03 Dec - 05 Dec	Air China
03 Dec - 06 Dec	Air China
03 Dec - 13 Dec	Air China
04 Dec - 06 Dec	Air China
04 Dec - 08 Dec	Air China
04 Dec - 10 Dec	Air China
31 Dec - 14 Jan	Air China
30 Dec - 09 Jan	Air China
22 Dec - 20 Jan	Air China
28 Dec - 09 Jan	Air China
17 Dec - 12 Jan	Air China
09 Dec - 07 Jan	Air China
11 Dec - 08 Jan	Air China
20 Dec - 10 Jan	China Eastern

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 320€

Return flights