The calculated distance (air line) between Ar Rastan and Khān Shaykhūn is approximately 36 miles respectively 58 kilometers.
By car or train, the actual journey to Khān Shaykhūn is certainly longer, as only the direct route (as the crow flies) between Ar Rastan and Khān Shaykhūn has been calculated here.
Air line (approximately)
58 kilometers
31 nautical miles