The calculated distance (air line) between Cormeilles-en-Parisis and Bois-Colombes is approximately 5 miles respectively 8 kilometers.
By car or train, the actual journey to Bois-Colombes is certainly longer, as only the direct route (as the crow flies) between Cormeilles-en-Parisis and Bois-Colombes has been calculated here.
Air line (approximately)
8 kilometers
4 nautical miles