The calculated distance (air line) between Az̧ Z̧āhirīyah and Dayr al Balaḩ is approximately 37 miles respectively 59 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 Az̧ Z̧āhirīyah and Dayr al Balaḩ has been calculated here.
Air line (approximately)
59 kilometers
32 nautical miles