The calculated distance (air line) between Ciechocinek and Bydgoszcz is approximately 37 miles respectively 59 kilometers.
By car or train, the actual journey to Bydgoszcz is certainly longer, as only the direct route (as the crow flies) between Ciechocinek and Bydgoszcz has been calculated here.
Air line (approximately)
59 kilometers
32 nautical miles