AirHint found the following cheapest return flights from Seoul (ICN) to Busan (PUS) in January 2026 (see full year).

Return flights

13 Jan - 15 Jan	Shanghai Airlines
13 Jan - 20 Jan	China Eastern
12 Jan - 19 Jan	Shanghai Airlines
17 Jan - 20 Jan	China Eastern
23 Jan - 25 Jan	China Eastern
13 Jan - 17 Jan	Shanghai Airlines
16 Jan - 20 Jan	Shanghai Airlines
20 Jan - 23 Jan	Jeju Air
14 Jan - 17 Jan	China Eastern
02 Jan - 05 Jan	Shanghai Airlines

Also check the deals for one-way flights from Seoul to Busan in January.

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 January from 278€

Return flights