The calculated distance (air line) between As Samū‘ and Dayr al Balaḩ is approximately 42 miles respectively 68 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 As Samū‘ and Dayr al Balaḩ has been calculated here.
Air line (approximately)
68 kilometers
37 nautical miles