The calculated distance (air line) between Bayt Ḩānūn and Nablus is approximately 63 miles respectively 102 kilometers.
By car or train, the actual journey to Nablus is certainly longer, as only the direct route (as the crow flies) between Bayt Ḩānūn and Nablus has been calculated here.
Air line (approximately)
102 kilometers
55 nautical miles