The calculated distance (air line) between Makhachkala and Khasavyurt is approximately 50 miles respectively 80 kilometers.
By car or train, the actual journey to Khasavyurt is certainly longer, as only the direct route (as the crow flies) between Makhachkala and Khasavyurt has been calculated here.
Air line (approximately)
80 kilometers
43 nautical miles