The calculated distance (air line) between Allières-et-Risset and Montpellier is approximately 136 miles respectively 219 kilometers.
By car or train, the actual journey to Montpellier is certainly longer, as only the direct route (as the crow flies) between Allières-et-Risset and Montpellier has been calculated here.
Air line (approximately)
219 kilometers
118 nautical miles