The calculated distance (air line) between Le Gros-Morne and Sainte-Luce is approximately 17 miles respectively 27 kilometers.
By car or train, the actual journey to Sainte-Luce is certainly longer, as only the direct route (as the crow flies) between Le Gros-Morne and Sainte-Luce has been calculated here.
Air line (approximately)
27 kilometers
15 nautical miles