Check the availability of seats on trains till departure date by entering train number, journey date, source and destination stations, and class. Book train tickets online in a secure and convenient way. Discover how to book a Chart Vacancy ticket on the Indian Railways. This guide provides a detailed, step-by-step process to help you secure last-minute train tickets. Use the “Charts/Vacancy” feature on the IRCTC website or mobile app to track chart updates in real-time. Always check at least twice—once 4 hours before and again 30 minutes before the train departure for final seat confirmation. Check the latest Chart Vacancy for trains in India. Find seat availability and booking info for your next journey with IRCTC.