The calculated distance (air line) between Diyarb Najm and Mashtūl as Sūq is approximately 27 miles respectively 44 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 Diyarb Najm and Mashtūl as Sūq has been calculated here.
Air line (approximately)
44 kilometers
24 nautical miles