The calculated distance (air line) between Sint-Pieters-Leeuw and Roeselare is approximately 50 miles respectively 81 kilometers.
By car or train, the actual journey to Roeselare is certainly longer, as only the direct route (as the crow flies) between Sint-Pieters-Leeuw and Roeselare has been calculated here.
Air line (approximately)
81 kilometers
44 nautical miles