The calculated distance (air line) between Dayr Ḩāfir and Ar Rastan is approximately 101 miles respectively 163 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 Ḩāfir and Ar Rastan has been calculated here.
Air line (approximately)
163 kilometers
88 nautical miles