The calculated distance (air line) between Saint-Quentin-en-Yvelines and Colombes is approximately 15 miles respectively 24 kilometers.
By car or train, the actual journey to Colombes is certainly longer, as only the direct route (as the crow flies) between Saint-Quentin-en-Yvelines and Colombes has been calculated here.
Air line (approximately)
24 kilometers
13 nautical miles