The calculated distance (air line) between Montignies-sur-Sambre and Deurne is approximately 56 miles respectively 90 kilometers.
By car or train, the actual journey to Deurne is certainly longer, as only the direct route (as the crow flies) between Montignies-sur-Sambre and Deurne has been calculated here.
Air line (approximately)
90 kilometers
49 nautical miles