The calculated distance (air line) between Zagazig and As Sinbillāwayn is approximately 21 miles respectively 33 kilometers.
By car or train, the actual journey to As Sinbillāwayn is certainly longer, as only the direct route (as the crow flies) between Zagazig and As Sinbillāwayn has been calculated here.
Air line (approximately)
33 kilometers
18 nautical miles