The calculated distance (air line) between Gentilly and Fontenay-aux-Roses is approximately 3 miles respectively 4 kilometers.
By car or train, the actual journey to Fontenay-aux-Roses is certainly longer, as only the direct route (as the crow flies) between Gentilly and Fontenay-aux-Roses has been calculated here.
Air line (approximately)
4 kilometers
2 nautical miles