The calculated distance (air line) between Minas de Matahambre and Cárdenas is approximately 177 miles respectively 285 kilometers.
By car or train, the actual journey to Cárdenas is certainly longer, as only the direct route (as the crow flies) between Minas de Matahambre and Cárdenas has been calculated here.
Air line (approximately)
285 kilometers
154 nautical miles