The calculated distance (air line) between Saint-Genis-Pouilly and Nîmes is approximately 185 miles respectively 298 kilometers.
By car or train, the actual journey to Nîmes is certainly longer, as only the direct route (as the crow flies) between Saint-Genis-Pouilly and Nîmes has been calculated here.
Air line (approximately)
298 kilometers
161 nautical miles