The calculated distance (air line) between Bīr Zayt and Dayr al Balaḩ is approximately 63 miles respectively 101 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 Bīr Zayt and Dayr al Balaḩ has been calculated here.
Air line (approximately)
101 kilometers
54 nautical miles