The calculated distance (air line) between Bila Tserkva and Knyazhichi is approximately 54 miles respectively 87 kilometers.
By car or train, the actual journey to Knyazhichi is certainly longer, as only the direct route (as the crow flies) between Bila Tserkva and Knyazhichi has been calculated here.
Air line (approximately)
87 kilometers
47 nautical miles