The calculated distance (air line) between Grand Baie and Poste de Flacq is approximately 14 miles respectively 23 kilometers.
By car or train, the actual journey to Poste de Flacq is certainly longer, as only the direct route (as the crow flies) between Grand Baie and Poste de Flacq has been calculated here.
Air line (approximately)
23 kilometers
12 nautical miles