The calculated distance (air line) between Saint-Paul-Trois-Châteaux and Grenoble is approximately 74 miles respectively 119 kilometers.
By car or train, the actual journey to Grenoble is certainly longer, as only the direct route (as the crow flies) between Saint-Paul-Trois-Châteaux and Grenoble has been calculated here.
Air line (approximately)
119 kilometers
64 nautical miles