The calculated distance (air line) between Piedra Blanca and San Francisco de Macorís is approximately 32 miles respectively 51 kilometers.
By car or train, the actual journey to San Francisco de Macorís is certainly longer, as only the direct route (as the crow flies) between Piedra Blanca and San Francisco de Macorís has been calculated here.
Air line (approximately)
51 kilometers
28 nautical miles