The calculated distance (air line) between Az Zaytūnīyah and Qalqīlyah is approximately 20 miles respectively 32 kilometers.
By car or train, the actual journey to Qalqīlyah is certainly longer, as only the direct route (as the crow flies) between Az Zaytūnīyah and Qalqīlyah has been calculated here.
Air line (approximately)
32 kilometers
17 nautical miles