The calculated distance (air line) between Chasiv Yar and Khartsyzk is approximately 40 miles respectively 65 kilometers.
By car or train, the actual journey to Khartsyzk is certainly longer, as only the direct route (as the crow flies) between Chasiv Yar and Khartsyzk has been calculated here.
Air line (approximately)
65 kilometers
35 nautical miles