The calculated distance (air line) between San Clemente del Tuyú and La Plata is approximately 121 miles respectively 194 kilometers.
By car or train, the actual journey to La Plata is certainly longer, as only the direct route (as the crow flies) between San Clemente del Tuyú and La Plata has been calculated here.
Air line (approximately)
194 kilometers
105 nautical miles