The calculated distance (air line) between As Salamīyah and ‘Afrīn is approximately 104 miles respectively 168 kilometers.
By car or train, the actual journey to ‘Afrīn is certainly longer, as only the direct route (as the crow flies) between As Salamīyah and ‘Afrīn has been calculated here.
Air line (approximately)
168 kilometers
90 nautical miles