The calculated distance (air line) between Juan de Herrera and Bajos de Haina is approximately 85 miles respectively 137 kilometers.
By car or train, the actual journey to Bajos de Haina is certainly longer, as only the direct route (as the crow flies) between Juan de Herrera and Bajos de Haina has been calculated here.
Air line (approximately)
137 kilometers
74 nautical miles