The calculated distance (air line) between Poznań and Piotrków Trybunalski is approximately 137 miles respectively 220 kilometers.
By car or train, the actual journey to Piotrków Trybunalski is certainly longer, as only the direct route (as the crow flies) between Poznań and Piotrków Trybunalski has been calculated here.
Air line (approximately)
220 kilometers
119 nautical miles