The calculated distance (air line) between Diyarb Najm and Az Zarqā is approximately 33 miles respectively 54 kilometers.
By car or train, the actual journey to Az Zarqā is certainly longer, as only the direct route (as the crow flies) between Diyarb Najm and Az Zarqā has been calculated here.
Air line (approximately)
54 kilometers
29 nautical miles