The calculated distance (air line) between Luhansk and Kamensk-Shakhtinsky is approximately 46 miles respectively 74 kilometers.
By car or train, the actual journey to Kamensk-Shakhtinsky is certainly longer, as only the direct route (as the crow flies) between Luhansk and Kamensk-Shakhtinsky has been calculated here.
Air line (approximately)
74 kilometers
40 nautical miles