The calculated distance (air line) between Ruda Śląska and Śródmieście is approximately 165 miles respectively 266 kilometers.
By car or train, the actual journey to Śródmieście is certainly longer, as only the direct route (as the crow flies) between Ruda Śląska and Śródmieście has been calculated here.
Air line (approximately)
266 kilometers
143 nautical miles