The calculated distance (air line) between ‘Irbīn and As Salamīyah is approximately 109 miles respectively 176 kilometers.
By car or train, the actual journey to As Salamīyah is certainly longer, as only the direct route (as the crow flies) between ‘Irbīn and As Salamīyah has been calculated here.
Air line (approximately)
176 kilometers
95 nautical miles