The calculated distance (air line) between Berchem-Sainte-Agathe and Mouscron is approximately 48 miles respectively 78 kilometers.
By car or train, the actual journey to Mouscron is certainly longer, as only the direct route (as the crow flies) between Berchem-Sainte-Agathe and Mouscron has been calculated here.
Air line (approximately)
78 kilometers
42 nautical miles