The calculated distance (air line) between Biddū and Bayt Ḩānūn is approximately 42 miles respectively 67 kilometers.
By car or train, the actual journey to Bayt Ḩānūn is certainly longer, as only the direct route (as the crow flies) between Biddū and Bayt Ḩānūn has been calculated here.
Air line (approximately)
67 kilometers
36 nautical miles