The calculated distance (air line) between Sint-Pieters-Leeuw and Borgerhout is approximately 31 miles respectively 50 kilometers.
By car or train, the actual journey to Borgerhout is certainly longer, as only the direct route (as the crow flies) between Sint-Pieters-Leeuw and Borgerhout has been calculated here.
Air line (approximately)
50 kilometers
27 nautical miles