The calculated distance (air line) between Damietta and Kawm Ḩamādah is approximately 80 miles respectively 129 kilometers.
By car or train, the actual journey to Kawm Ḩamādah is certainly longer, as only the direct route (as the crow flies) between Damietta and Kawm Ḩamādah has been calculated here.
Air line (approximately)
129 kilometers
69 nautical miles