The calculated distance (air line) between Al Qāhirah al Jadīdah and Qalyub is approximately 17 miles respectively 28 kilometers.
By car or train, the actual journey to Qalyub is certainly longer, as only the direct route (as the crow flies) between Al Qāhirah al Jadīdah and Qalyub has been calculated here.
Air line (approximately)
28 kilometers
15 nautical miles