The calculated distance (air line) between Kamyanka-Dniprovska and Horlivka is approximately 178 miles respectively 287 kilometers.
By car or train, the actual journey to Horlivka is certainly longer, as only the direct route (as the crow flies) between Kamyanka-Dniprovska and Horlivka has been calculated here.
Air line (approximately)
287 kilometers
155 nautical miles