The calculated distance (air line) between Cárdenas and La Habana Vieja is approximately 73 miles respectively 118 kilometers.
By car or train, the actual journey to La Habana Vieja is certainly longer, as only the direct route (as the crow flies) between Cárdenas and La Habana Vieja has been calculated here.
Air line (approximately)
118 kilometers
64 nautical miles