The calculated distance (air line) between Idlib and ‘Ayn al ‘Arab is approximately 116 miles respectively 187 kilometers.
By car or train, the actual journey to ‘Ayn al ‘Arab is certainly longer, as only the direct route (as the crow flies) between Idlib and ‘Ayn al ‘Arab has been calculated here.
Air line (approximately)
187 kilometers
101 nautical miles