The calculated distance (air line) between Miasteczko Śląskie and Bydgoszcz is approximately 185 miles respectively 298 kilometers.
By car or train, the actual journey to Bydgoszcz is certainly longer, as only the direct route (as the crow flies) between Miasteczko Śląskie and Bydgoszcz has been calculated here.
Air line (approximately)
298 kilometers
161 nautical miles