Cheonan is now connected to Seoul, the capital city, by subway. There are two subway stations in Cheoanan - Dujeong-dong Subway Station and Cheonan Subway Station(which is also the train station.) The trip takes about 2 hours from Seoul by subway (Line #1). The cost is just 2100-2300 won. The subway is crowded during rush hours because of commuters and Cheonan university students. Try to travel during off peak hours.