The calculated distance (air line) between San Clemente del Tuyú and Mar del Plata is approximately 123 miles respectively 197 kilometers.
By car or train, the actual journey to Mar del Plata is certainly longer, as only the direct route (as the crow flies) between San Clemente del Tuyú and Mar del Plata has been calculated here.
Air line (approximately)
197 kilometers
106 nautical miles