Korail operates a train from Osong Station to Seoul hourly. Tickets cost $10 - $17 and the journey takes 53 min. Alternatively, Suseo High Speed Railway operates a bus from Osong Station to Seoul every 30 minutes. Tickets cost $3 - $5 and the journey takes 11 min. 2 other operators also service this route.
From Osong Station train to Seoul Station. 53 min ₩15,131. From Osong Station train to Cheonan Asan Station, walk to Cheonan Asan, then bus to Seoul Express Bus Terminal. 2 h 2 min ₩10,981. From Osong Station taxi to Seoul. 1 h 38 min ₩157,764. From Osong Station drive to Seoul. 1 h 38 min ₩23,403.