The calculated distance (air line) between Unión de Reyes and Sancti Spíritus is approximately 147 miles respectively 236 kilometers.
By car or train, the actual journey to Sancti Spíritus is certainly longer, as only the direct route (as the crow flies) between Unión de Reyes and Sancti Spíritus has been calculated here.
Air line (approximately)
236 kilometers
127 nautical miles