The calculated distance (air line) between Sumusţā as Sulţānī and Damanhur is approximately 148 miles respectively 238 kilometers.
By car or train, the actual journey to Damanhur is certainly longer, as only the direct route (as the crow flies) between Sumusţā as Sulţānī and Damanhur has been calculated here.
Air line (approximately)
238 kilometers
129 nautical miles