The calculated distance (air line) between Piotrków Kujawski and Ruda Śląska is approximately 159 miles respectively 256 kilometers.
By car or train, the actual journey to Ruda Śląska is certainly longer, as only the direct route (as the crow flies) between Piotrków Kujawski and Ruda Śląska has been calculated here.
Air line (approximately)
256 kilometers
138 nautical miles