The calculated distance (air line) between Damietta and Banī Suwayf is approximately 167 miles respectively 269 kilometers.
By car or train, the actual journey to Banī Suwayf is certainly longer, as only the direct route (as the crow flies) between Damietta and Banī Suwayf has been calculated here.
Air line (approximately)
269 kilometers
145 nautical miles