The calculated distance (air line) between Saint-Joseph and L'Étang-Salé is approximately 17 miles respectively 28 kilometers.
By car or train, the actual journey to L'Étang-Salé is certainly longer, as only the direct route (as the crow flies) between Saint-Joseph and L'Étang-Salé has been calculated here.
Air line (approximately)
28 kilometers
15 nautical miles