The calculated distance (air line) between Terrasson-Lavilledieu and Montpellier is approximately 165 miles respectively 265 kilometers.
By car or train, the actual journey to Montpellier is certainly longer, as only the direct route (as the crow flies) between Terrasson-Lavilledieu and Montpellier has been calculated here.
Air line (approximately)
265 kilometers
143 nautical miles