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
14 Dec - 18 Dec	Jin Air
20 Dec - 23 Dec	Asiana Airlines
12 Dec - 22 Dec	China Southern
21 Dec - 24 Dec	Jin Air
25 Dec - 06 Jan	Jeju Air
20 Dec - 27 Dec	Jeju Air
14 Dec - 21 Dec	Air Busan
31 Dec - 04 Jan	Korean Air

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 242€

Return flights