The calculated distance (air line) between Idlib and Ma‘arratmişrīn is approximately 6 miles respectively 10 kilometers.
By car or train, the actual journey to Ma‘arratmişrīn is certainly longer, as only the direct route (as the crow flies) between Idlib and Ma‘arratmişrīn has been calculated here.
Air line (approximately)
10 kilometers
5 nautical miles