The calculated distance (air line) between Olsztyn and Piotrków Trybunalski is approximately 167 miles respectively 269 kilometers.
By car or train, the actual journey to Piotrków Trybunalski is certainly longer, as only the direct route (as the crow flies) between Olsztyn and Piotrków Trybunalski has been calculated here.
Air line (approximately)
269 kilometers
145 nautical miles