The calculated distance (air line) between Bidyā and Bayt Ḩānūn is approximately 51 miles respectively 82 kilometers.
By car or train, the actual journey to Bayt Ḩānūn is certainly longer, as only the direct route (as the crow flies) between Bidyā and Bayt Ḩānūn has been calculated here.
Air line (approximately)
82 kilometers
44 nautical miles