The calculated distance (air line) between Skarżysko-Kamienna and Wrocław is approximately 167 miles respectively 268 kilometers.
By car or train, the actual journey to Wrocław is certainly longer, as only the direct route (as the crow flies) between Skarżysko-Kamienna and Wrocław has been calculated here.
Air line (approximately)
268 kilometers
145 nautical miles