The calculated distance (air line) between Biddū and Bayt Lāhyā is approximately 43 miles respectively 70 kilometers.
By car or train, the actual journey to Bayt Lāhyā is certainly longer, as only the direct route (as the crow flies) between Biddū and Bayt Lāhyā has been calculated here.
Air line (approximately)
70 kilometers
38 nautical miles