The calculated distance (air line) between Bydgoszcz and Piotrków Trybunalski is approximately 139 miles respectively 223 kilometers.
By car or train, the actual journey to Piotrków Trybunalski is certainly longer, as only the direct route (as the crow flies) between Bydgoszcz and Piotrków Trybunalski has been calculated here.
Air line (approximately)
223 kilometers
120 nautical miles