The calculated distance (air line) between Kamianets-Podilskyi and Derazhnya is approximately 56 miles respectively 90 kilometers.
By car or train, the actual journey to Derazhnya is certainly longer, as only the direct route (as the crow flies) between Kamianets-Podilskyi and Derazhnya has been calculated here.
Air line (approximately)
90 kilometers
49 nautical miles