The calculated distance (air line) between Dayr al ‘Aşāfīr and Ar Rastan is approximately 103 miles respectively 165 kilometers.
By car or train, the actual journey to Ar Rastan is certainly longer, as only the direct route (as the crow flies) between Dayr al ‘Aşāfīr and Ar Rastan has been calculated here.
Air line (approximately)
165 kilometers
89 nautical miles