Korail operates a train from Seoul to Osong Station hourly. Tickets cost $10 - $17 and the journey takes 53 min. Alternatively, Ko Bus operates a bus from Seoul to Osong Station hourly. Tickets cost $6 - $9 and the journey takes 1 h 15 min.
From Seoul Station train to Osong Station. 53 min ₩15,131. From Seoul Express Bus Terminal bus to Cheonan Asan, walk to Cheonan Asan Station, then train to Osong Station. 1 h 44 min ₩10,662. From Seoul taxi to Osong Station. 1 h 27 min ₩139,986. From Seoul drive to Osong Station. 1 h 27 min ₩20,699.