The calculated distance (air line) between Houdeng-Aimeries and Mouscron is approximately 45 miles respectively 72 kilometers.
By car or train, the actual journey to Mouscron is certainly longer, as only the direct route (as the crow flies) between Houdeng-Aimeries and Mouscron has been calculated here.
Air line (approximately)
72 kilometers
39 nautical miles