The calculated distance (air line) between Gryfów Śląski and Bydgoszcz is approximately 182 miles respectively 292 kilometers.
By car or train, the actual journey to Bydgoszcz is certainly longer, as only the direct route (as the crow flies) between Gryfów Śląski and Bydgoszcz has been calculated here.
Air line (approximately)
292 kilometers
158 nautical miles