The calculated distance (air line) between Piotrków Kujawski and Gliwice is approximately 156 miles respectively 251 kilometers.
By car or train, the actual journey to Gliwice is certainly longer, as only the direct route (as the crow flies) between Piotrków Kujawski and Gliwice has been calculated here.
Air line (approximately)
251 kilometers
135 nautical miles