The calculated distance (air line) between Châteauneuf-les-Martigues and Nîmes is approximately 51 miles respectively 82 kilometers.
By car or train, the actual journey to Nîmes is certainly longer, as only the direct route (as the crow flies) between Châteauneuf-les-Martigues and Nîmes has been calculated here.
Air line (approximately)
82 kilometers
44 nautical miles