The calculated distance (air line) between Charvieu-Chavagneux and Montpellier is approximately 161 miles respectively 258 kilometers.
By car or train, the actual journey to Montpellier is certainly longer, as only the direct route (as the crow flies) between Charvieu-Chavagneux and Montpellier has been calculated here.
Air line (approximately)
258 kilometers
139 nautical miles