The calculated distance (air line) between Sa‘īr and Dayr al Balaḩ is approximately 48 miles respectively 77 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 Sa‘īr and Dayr al Balaḩ has been calculated here.
Air line (approximately)
77 kilometers
42 nautical miles