The calculated distance (air line) between Bidyā and Bayt Lāhyā is approximately 52 miles respectively 84 kilometers.
By car or train, the actual journey to Bayt Lāhyā is certainly longer, as only the direct route (as the crow flies) between Bidyā and Bayt Lāhyā has been calculated here.
Air line (approximately)
84 kilometers
45 nautical miles