The calculated distance (air line) between Saint-Quentin-en-Yvelines and Drancy is approximately 22 miles respectively 36 kilometers.
By car or train, the actual journey to Drancy is certainly longer, as only the direct route (as the crow flies) between Saint-Quentin-en-Yvelines and Drancy has been calculated here.
Air line (approximately)
36 kilometers
19 nautical miles