The calculated distance (air line) between Les Trois-Îlets and Gros Islet is approximately 33 miles respectively 53 kilometers.
By car or train, the actual journey to Gros Islet is certainly longer, as only the direct route (as the crow flies) between Les Trois-Îlets and Gros Islet has been calculated here.
Air line (approximately)
53 kilometers
29 nautical miles