The calculated distance (air line) between Bayt Ḩānūn and Dayr al Balaḩ is approximately 14 miles respectively 22 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 Ḩānūn and Dayr al Balaḩ has been calculated here.
Air line (approximately)
22 kilometers
12 nautical miles