The calculated distance (air line) between Zgorzelec and Ruda Śląska is approximately 179 miles respectively 288 kilometers.
By car or train, the actual journey to Ruda Śląska is certainly longer, as only the direct route (as the crow flies) between Zgorzelec and Ruda Śląska has been calculated here.
Air line (approximately)
288 kilometers
156 nautical miles