The calculated distance (air line) between Roboré and San Ignacio de Velasco is approximately 157 miles respectively 252 kilometers.
By car or train, the actual journey to San Ignacio de Velasco is certainly longer, as only the direct route (as the crow flies) between Roboré and San Ignacio de Velasco has been calculated here.
Air line (approximately)
252 kilometers
136 nautical miles