The calculated distance (air line) between Saint-Clément-de-Rivière and Marseille is approximately 82 miles respectively 132 kilometers.
By car or train, the actual journey to Marseille is certainly longer, as only the direct route (as the crow flies) between Saint-Clément-de-Rivière and Marseille has been calculated here.
Air line (approximately)
132 kilometers
71 nautical miles