The calculated distance (air line) between Skarżysko-Kamienna and Śródmieście is approximately 77 miles respectively 124 kilometers.
By car or train, the actual journey to Śródmieście is certainly longer, as only the direct route (as the crow flies) between Skarżysko-Kamienna and Śródmieście has been calculated here.
Air line (approximately)
124 kilometers
67 nautical miles