The calculated distance (air line) between Al Bīrah and Dayr al Balaḩ is approximately 61 miles respectively 99 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 Al Bīrah and Dayr al Balaḩ has been calculated here.
Air line (approximately)
99 kilometers
53 nautical miles