The calculated distance (air line) between Maḩallat Damanah and Damietta is approximately 30 miles respectively 49 kilometers.
By car or train, the actual journey to Damietta is certainly longer, as only the direct route (as the crow flies) between Maḩallat Damanah and Damietta has been calculated here.
Air line (approximately)
49 kilometers
26 nautical miles