The calculated distance (air line) between Terre Rouge and Poste de Flacq is approximately 13 miles respectively 21 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 Terre Rouge and Poste de Flacq has been calculated here.
Air line (approximately)
21 kilometers
11 nautical miles