The calculated distance (air line) between New Cairo and Mashtūl as Sūq is approximately 24 miles respectively 38 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 New Cairo and Mashtūl as Sūq has been calculated here.
Air line (approximately)
38 kilometers
20 nautical miles