The calculated distance (air line) between An Nūbārīyah and Damietta is approximately 115 miles respectively 185 kilometers.
By car or train, the actual journey to Damietta is certainly longer, as only the direct route (as the crow flies) between An Nūbārīyah and Damietta has been calculated here.
Air line (approximately)
185 kilometers
100 nautical miles