The calculated distance (air line) between Croix-des-Bouquets and Gressier is approximately 20 miles respectively 32 kilometers.
By car or train, the actual journey to Gressier is certainly longer, as only the direct route (as the crow flies) between Croix-des-Bouquets and Gressier has been calculated here.
Air line (approximately)
32 kilometers
17 nautical miles