The calculated distance (air line) between Bal‘ā and Dayr al Balaḩ is approximately 77 miles respectively 125 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 Bal‘ā and Dayr al Balaḩ has been calculated here.
Air line (approximately)
125 kilometers
67 nautical miles