The calculated distance (air line) between Bilbeis and Diyarb Najm is approximately 24 miles respectively 39 kilometers.
By car or train, the actual journey to Diyarb Najm is certainly longer, as only the direct route (as the crow flies) between Bilbeis and Diyarb Najm has been calculated here.
Air line (approximately)
39 kilometers
21 nautical miles