The calculated distance (air line) between Sainte-Marguerite and Montpellier is approximately 80 miles respectively 129 kilometers.
By car or train, the actual journey to Montpellier is certainly longer, as only the direct route (as the crow flies) between Sainte-Marguerite and Montpellier has been calculated here.
Air line (approximately)
129 kilometers
70 nautical miles