The calculated distance (air line) between As Salamīyah and Dārayyā is approximately 117 miles respectively 188 kilometers.
By car or train, the actual journey to Dārayyā is certainly longer, as only the direct route (as the crow flies) between As Salamīyah and Dārayyā has been calculated here.
Air line (approximately)
188 kilometers
102 nautical miles