The calculated distance (air line) between Bayt Ḩānūn and Bethlehem is approximately 41 miles respectively 66 kilometers.
By car or train, the actual journey to Bethlehem is certainly longer, as only the direct route (as the crow flies) between Bayt Ḩānūn and Bethlehem has been calculated here.
Air line (approximately)
66 kilometers
36 nautical miles