The calculated distance (air line) between Grenoble and Aix-en-Provence is approximately 115 miles respectively 185 kilometers.
By car or train, the actual journey to Aix-en-Provence is certainly longer, as only the direct route (as the crow flies) between Grenoble and Aix-en-Provence has been calculated here.
Air line (approximately)
185 kilometers
100 nautical miles