The calculated distance (air line) between Hollogne-aux-Pierres and Charleroi is approximately 48 miles respectively 77 kilometers.
By car or train, the actual journey to Charleroi is certainly longer, as only the direct route (as the crow flies) between Hollogne-aux-Pierres and Charleroi has been calculated here.
Air line (approximately)
77 kilometers
42 nautical miles