The calculated distance (air line) between Piotrków Kujawski and Mokotów is approximately 110 miles respectively 177 kilometers.
By car or train, the actual journey to Mokotów is certainly longer, as only the direct route (as the crow flies) between Piotrków Kujawski and Mokotów has been calculated here.
Air line (approximately)
177 kilometers
95 nautical miles