The calculated distance (air line) between Chastre-Villeroux-Blanmont and Genk is approximately 45 miles respectively 72 kilometers.
By car or train, the actual journey to Genk is certainly longer, as only the direct route (as the crow flies) between Chastre-Villeroux-Blanmont and Genk has been calculated here.
Air line (approximately)
72 kilometers
39 nautical miles