The calculated distance (air line) between Nîmes and Castelnau-le-Lez is approximately 27 miles respectively 43 kilometers.
By car or train, the actual journey to Castelnau-le-Lez is certainly longer, as only the direct route (as the crow flies) between Nîmes and Castelnau-le-Lez has been calculated here.
Air line (approximately)
43 kilometers
23 nautical miles