Getting from Terminal 1 to Terminal 2 at Paris Charles de Gaulle (CDG) typically takes between 20 and 30 minutes, and the most efficient way to do this is via the CDGVAL, the airport's free, automated shuttle train. The CDGVAL train itself only takes about 8 minutes to travel between the two stations, but you must account for the time spent walking from your arrival gate to the shuttle station, waiting for the next train (which runs every 4 minutes), and then walking from the Terminal 2 station to your specific hall (2A, 2C, 2E, 2F, etc.). Terminal 2 is massive and spread out, so if your connecting flight is in Terminal 2G, you will need to take an additional bus shuttle from 2E, which can add another 15 minutes to your journey. If you are transferring between flights, it is highly recommended to allow at least 90 minutes for the total transfer process to account for passport control and security. While the terminals are physically separate, the CDGVAL makes the transition relatively straightforward, provided you follow the clear "Correspondence" or "Terminal" signs throughout the airport's somewhat labyrinthine layout.