The calculated distance (air line) between Hnidyn and Khmelnytskyi is approximately 178 miles respectively 286 kilometers.
By car or train, the actual journey to Khmelnytskyi is certainly longer, as only the direct route (as the crow flies) between Hnidyn and Khmelnytskyi has been calculated here.
Air line (approximately)
286 kilometers
154 nautical miles