The calculated distance (air line) between Bayt Ūmmar and Dayr al Balaḩ is approximately 47 miles respectively 75 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 Ūmmar and Dayr al Balaḩ has been calculated here.
Air line (approximately)
75 kilometers
41 nautical miles