The calculated distance (air line) between Bayt Jālā and Dayr al Balaḩ is approximately 53 miles respectively 86 kilometers.
By car or train, the actual journey to Dayr al Balaḩ is certainly longer, as only the direct route (as the crow flies) between Bayt Jālā and Dayr al Balaḩ has been calculated here.
Air line (approximately)
86 kilometers
46 nautical miles