The calculated distance (air line) between Bayt Fajjār and Qalqīlyah is approximately 41 miles respectively 65 kilometers.
By car or train, the actual journey to Qalqīlyah is certainly longer, as only the direct route (as the crow flies) between Bayt Fajjār and Qalqīlyah has been calculated here.
Air line (approximately)
65 kilometers
35 nautical miles