The calculated distance (air line) between As Salamīyah and As-Suwayda is approximately 161 miles respectively 260 kilometers.
By car or train, the actual journey to As-Suwayda is certainly longer, as only the direct route (as the crow flies) between As Salamīyah and As-Suwayda has been calculated here.
Air line (approximately)
260 kilometers
140 nautical miles