The calculated distance (air line) between Sint-Martens-Lennik and Roeselare is approximately 47 miles respectively 75 kilometers.
By car or train, the actual journey to Roeselare is certainly longer, as only the direct route (as the crow flies) between Sint-Martens-Lennik and Roeselare has been calculated here.
Air line (approximately)
75 kilometers
40 nautical miles