The calculated distance (air line) between Port-de-Paix and Grande Rivière du Nord is approximately 50 miles respectively 80 kilometers.
By car or train, the actual journey to Grande Rivière du Nord is certainly longer, as only the direct route (as the crow flies) between Port-de-Paix and Grande Rivière du Nord has been calculated here.
Air line (approximately)
80 kilometers
43 nautical miles