Luggage storage at Incheon airport, near Seoul, is fast and simple.
The facility is provided in both terminals by Hanjin, the parent company of Korean Air. As well as ambient temperature storage, a cold storage option is available, which could be useful if for example you wish to store food.
The tariff, in Korean won, is as follows.
The counter is located at the departure level. As you face in to the terminal, it is in the far left corner, close to gate area six. It is open twenty four hours, daily.
The counter is on the arrivals level – just turn right after the arrivals exit as you arrive.
It is open from 6.30 a.m. to 10.30 p.m. daily. If arriving outwith these hours, you may consider using the counter in terminal one.