The calculated distance (air line) between Maythalūn and Dayr al Balaḩ is approximately 84 miles respectively 135 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 Maythalūn and Dayr al Balaḩ has been calculated here.
Air line (approximately)
135 kilometers
73 nautical miles