The calculated distance (air line) between Munūf and Diyarb Najm is approximately 36 miles respectively 58 kilometers.
By car or train, the actual journey to Diyarb Najm is certainly longer, as only the direct route (as the crow flies) between Munūf and Diyarb Najm has been calculated here.
Air line (approximately)
58 kilometers
31 nautical miles