The calculated distance (air line) between Strzelce Opolskie and Bydgoszcz is approximately 181 miles respectively 291 kilometers.
By car or train, the actual journey to Bydgoszcz is certainly longer, as only the direct route (as the crow flies) between Strzelce Opolskie and Bydgoszcz has been calculated here.
Air line (approximately)
291 kilometers
157 nautical miles