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