The calculated distance (air line) between Sīlat al Ḩārithīyah and An Nuşayrāt is approximately 88 miles respectively 142 kilometers.
By car or train, the actual journey to An Nuşayrāt is certainly longer, as only the direct route (as the crow flies) between Sīlat al Ḩārithīyah and An Nuşayrāt has been calculated here.
Air line (approximately)
142 kilometers
76 nautical miles