The calculated distance (air line) between Jisr ash Shughūr and An Nabk is approximately 126 miles respectively 203 kilometers.
By car or train, the actual journey to An Nabk is certainly longer, as only the direct route (as the crow flies) between Jisr ash Shughūr and An Nabk has been calculated here.
Air line (approximately)
203 kilometers
109 nautical miles