The calculated distance (air line) between Zagazig and Diyarb Najm is approximately 12 miles respectively 19 kilometers.
By car or train, the actual journey to Diyarb Najm is certainly longer, as only the direct route (as the crow flies) between Zagazig and Diyarb Najm has been calculated here.
Air line (approximately)
19 kilometers
11 nautical miles