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

Return flights

22 Dec - 29 Dec	Jin Air
24 Dec - 30 Dec	Jeju Air
22 Dec - 23 Dec	Jin Air
23 Dec - 30 Dec	Jeju Air
23 Dec - 23 Dec	T'way Air
27 Dec - 28 Dec	VietJet Air
24 Dec - 31 Dec	Jeju Air
22 Dec - 25 Dec	Jin Air
24 Dec - 28 Dec	Eastar Jet
29 Dec - 02 Jan	Eastar Jet
29 Dec - 01 Jan	T'way Air
24 Dec - 25 Dec	Jeju Air
30 Dec - 05 Jan	Eastar Jet
30 Dec - 02 Jan	Eastar Jet
30 Dec - 01 Jan	T'way Air
28 Dec - 01 Jan	T'way Air
31 Dec - 02 Jan	Jin Air
25 Dec - 01 Jan	Air Busan
31 Dec - 01 Jan	Jin Air
26 Dec - 02 Jan	T'way 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 296€

Return flights