You can walk between these terminals, which might take about 10-15 minutes. Clear signage throughout the terminals will guide you along the path. This is a feasible option if you have light luggage and some time before your next flight. CDG airport provides a free shuttle bus too, the N2 shuttle, which connects Terminal 2B to Terminal 2E. The shuttle buses run frequently, about every 5 to 10 minutes, and the journey itself takes only a few minutes.

Another option is to use the CDGVAL light rail service. However, for Terminal 2B and 2E, walking or the shuttle bus might be more direct since CDGVAL primarily connects Terminal 2 to Terminal 1 and the parking complexes...