The calculated distance (air line) between Vacoas and Poste de Flacq is approximately 19 miles respectively 30 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 Vacoas and Poste de Flacq has been calculated here.
Air line (approximately)
30 kilometers
16 nautical miles