The calculated distance (air line) between Welchman Hall and Rivière-Pilote is approximately 126 miles respectively 203 kilometers.
By car or train, the actual journey to Rivière-Pilote is certainly longer, as only the direct route (as the crow flies) between Welchman Hall and Rivière-Pilote has been calculated here.
Air line (approximately)
203 kilometers
110 nautical miles