The calculated distance (air line) between Jisr ash Shughūr and As Salamīyah is approximately 69 miles respectively 111 kilometers.
By car or train, the actual journey to As Salamīyah is certainly longer, as only the direct route (as the crow flies) between Jisr ash Shughūr and As Salamīyah has been calculated here.
Air line (approximately)
111 kilometers
60 nautical miles