The calculated distance (air line) between Hato Mayor del Rey and Bajos de Haina is approximately 56 miles respectively 90 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 Hato Mayor del Rey and Bajos de Haina has been calculated here.
Air line (approximately)
90 kilometers
49 nautical miles