The calculated distance (air line) between Oborniki Śląskie and Bydgoszcz is approximately 134 miles respectively 216 kilometers.
By car or train, the actual journey to Bydgoszcz is certainly longer, as only the direct route (as the crow flies) between Oborniki Śląskie and Bydgoszcz has been calculated here.
Air line (approximately)
216 kilometers
116 nautical miles