The calculated distance (air line) between Saint-Paul-Trois-Châteaux and Montpellier is approximately 67 miles respectively 108 kilometers.
By car or train, the actual journey to Montpellier is certainly longer, as only the direct route (as the crow flies) between Saint-Paul-Trois-Châteaux and Montpellier has been calculated here.
Air line (approximately)
108 kilometers
58 nautical miles