The calculated distance (air line) between Al Ḩawāmidīyah and Diyarb Najm is approximately 60 miles respectively 97 kilometers.
By car or train, the actual journey to Diyarb Najm is certainly longer, as only the direct route (as the crow flies) between Al Ḩawāmidīyah and Diyarb Najm has been calculated here.
Air line (approximately)
97 kilometers
52 nautical miles