The calculated distance (air line) between Montigny-le-Tilleul and Mouscron is approximately 57 miles respectively 92 kilometers.
By car or train, the actual journey to Mouscron is certainly longer, as only the direct route (as the crow flies) between Montigny-le-Tilleul and Mouscron has been calculated here.
Air line (approximately)
92 kilometers
50 nautical miles