The calculated distance (air line) between Manshīyat al Qanāţir and Giza is approximately 14 miles respectively 22 kilometers.
By car or train, the actual journey to Giza is certainly longer, as only the direct route (as the crow flies) between Manshīyat al Qanāţir and Giza has been calculated here.
Air line (approximately)
22 kilometers
12 nautical miles