The calculated distance (air line) between Svetlodarsk and Chasiv Yar is approximately 20 miles respectively 32 kilometers.
By car or train, the actual journey to Chasiv Yar is certainly longer, as only the direct route (as the crow flies) between Svetlodarsk and Chasiv Yar has been calculated here.
Air line (approximately)
32 kilometers
17 nautical miles