The calculated distance (air line) between Saint-Martin-de-Crau and Grenoble is approximately 115 miles respectively 186 kilometers.
By car or train, the actual journey to Grenoble is certainly longer, as only the direct route (as the crow flies) between Saint-Martin-de-Crau and Grenoble has been calculated here.
Air line (approximately)
186 kilometers
100 nautical miles