The calculated distance (air line) between Châteaurenard and Aix-en-Provence is approximately 38 miles respectively 62 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 Châteaurenard and Aix-en-Provence has been calculated here.
Air line (approximately)
62 kilometers
33 nautical miles