The calculated distance (air line) between Szydłowiec and Śródmieście is approximately 69 miles respectively 112 kilometers.
By car or train, the actual journey to Śródmieście is certainly longer, as only the direct route (as the crow flies) between Szydłowiec and Śródmieście has been calculated here.
Air line (approximately)
112 kilometers
60 nautical miles