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