The KTX high-speed train from Cheonan to Jangseong departs as early as 6:30 AM, with the last train leaving around 8:30 PM. Key stations along the route include Seoul, Daejeon, and Gwangju. The journey takes approximately 1 hour and 20 minutes. Ticket prices start from ₩25,000 (approximately $21 USD) for standard class, with a higher fare for First Class. You can reserve a seat and check the schedule through online booking, ensuring you have all the details for your travel plans.