The calculated distance (air line) between Brie-Comte-Robert and Paris 15 Vaugirard is approximately 17 miles respectively 28 kilometers.
By car or train, the actual journey to Paris 15 Vaugirard is certainly longer, as only the direct route (as the crow flies) between Brie-Comte-Robert and Paris 15 Vaugirard has been calculated here.
Air line (approximately)
28 kilometers
15 nautical miles