The calculated distance (air line) between Damietta and Mashtūl as Sūq is approximately 77 miles respectively 125 kilometers.
By car or train, the actual journey to Mashtūl as Sūq is certainly longer, as only the direct route (as the crow flies) between Damietta and Mashtūl as Sūq has been calculated here.
Air line (approximately)
125 kilometers
67 nautical miles