The calculated distance (air line) between Welchman Hall and Les Trois-Îlets is approximately 135 miles respectively 218 kilometers.
By car or train, the actual journey to Les Trois-Îlets is certainly longer, as only the direct route (as the crow flies) between Welchman Hall and Les Trois-Îlets has been calculated here.
Air line (approximately)
218 kilometers
117 nautical miles