The KTX high-speed train from Sangdong to Gunbuk departs from Sangdong Station as early as 5:30 AM, with the last train leaving around 8:45 PM. Main stops include Gimpo, Incheon, and Suwon. This route is serviced by the KTX, which takes approximately 2 hours for the journey. Prices for tickets start at ₩27,000 (approximately $18.81 USD) for standard class, with First Class providing additional luxury. You can reserve a seat and access the full timetable through online booking, allowing you to plan your trip effectively.