The calculated distance (air line) between Aix-en-Provence and Marseille 13 is approximately 15 miles respectively 24 kilometers.
By car or train, the actual journey to Marseille 13 is certainly longer, as only the direct route (as the crow flies) between Aix-en-Provence and Marseille 13 has been calculated here.
Air line (approximately)
24 kilometers
13 nautical miles