The calculated distance (air line) between San Pedro de Macorís and Boca Chica is approximately 19 miles respectively 31 kilometers.
By car or train, the actual journey to Boca Chica is certainly longer, as only the direct route (as the crow flies) between San Pedro de Macorís and Boca Chica has been calculated here.
Air line (approximately)
31 kilometers
17 nautical miles