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

Return flights

02 Dec - 09 Dec	Jeju Air
04 Dec - 08 Dec	Jeju Air
08 Dec - 09 Dec	Jeju Air
03 Dec - 09 Dec	Peach
03 Dec - 08 Dec	Jeju Air
01 Dec - 08 Dec	Jeju Air
02 Dec - 03 Dec	Jeju Air
03 Dec - 10 Dec	Peach
09 Dec - 16 Dec	Jeju Air
07 Dec - 09 Dec	Jeju Air
30 Dec - 02 Jan	China Eastern
31 Dec - 03 Jan	China Eastern
30 Dec - 03 Jan	Shanghai Airlines
31 Dec - 02 Jan	Korean Air
29 Dec - 02 Jan	Jeju Air
26 Dec - 03 Jan	China Eastern
31 Dec - 01 Jan	China Eastern
30 Dec - 01 Jan	China Eastern
26 Dec - 02 Jan	China Eastern
27 Dec - 03 Jan	China Eastern

Also check the deals for one-way flights from Seoul to Busan 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 Busan in December from 220€

Return flights