The calculated distance (air line) between Banhā and Diyarb Najm is approximately 25 miles respectively 41 kilometers.
By car or train, the actual journey to Diyarb Najm is certainly longer, as only the direct route (as the crow flies) between Banhā and Diyarb Najm has been calculated here.
Air line (approximately)
41 kilometers
22 nautical miles