The calculated distance (air line) between Roncq and Mons-en-Barœul is approximately 8 miles respectively 13 kilometers.
By car or train, the actual journey to Mons-en-Barœul is certainly longer, as only the direct route (as the crow flies) between Roncq and Mons-en-Barœul has been calculated here.
Air line (approximately)
13 kilometers
7 nautical miles