The calculated distance (air line) between Białobrzegi and Bydgoszcz is approximately 161 miles respectively 259 kilometers.
By car or train, the actual journey to Bydgoszcz is certainly longer, as only the direct route (as the crow flies) between Białobrzegi and Bydgoszcz has been calculated here.
Air line (approximately)
259 kilometers
139 nautical miles