The calculated distance (air line) between Al Qaryatayn and Khān Shaykhūn is approximately 90 miles respectively 145 kilometers.
By car or train, the actual journey to Khān Shaykhūn is certainly longer, as only the direct route (as the crow flies) between Al Qaryatayn and Khān Shaykhūn has been calculated here.
Air line (approximately)
145 kilometers
78 nautical miles