The calculated distance (air line) between Herblay and La Garenne-Colombes is approximately 7 miles respectively 11 kilometers.
By car or train, the actual journey to La Garenne-Colombes is certainly longer, as only the direct route (as the crow flies) between Herblay and La Garenne-Colombes has been calculated here.
Air line (approximately)
11 kilometers
6 nautical miles