The calculated distance (air line) between Al Qunayţirah and As Salamīyah is approximately 148 miles respectively 238 kilometers.
By car or train, the actual journey to As Salamīyah is certainly longer, as only the direct route (as the crow flies) between Al Qunayţirah and As Salamīyah has been calculated here.
Air line (approximately)
238 kilometers
129 nautical miles