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