The calculated distance (air line) between Krzyż Wielkopolski and Bydgoszcz is approximately 85 miles respectively 136 kilometers.
By car or train, the actual journey to Bydgoszcz is certainly longer, as only the direct route (as the crow flies) between Krzyż Wielkopolski and Bydgoszcz has been calculated here.
Air line (approximately)
136 kilometers
74 nautical miles