The calculated distance (air line) between Pamplemousses and Montagne Blanche is approximately 14 miles respectively 22 kilometers.
By car or train, the actual journey to Montagne Blanche is certainly longer, as only the direct route (as the crow flies) between Pamplemousses and Montagne Blanche has been calculated here.
Air line (approximately)
22 kilometers
12 nautical miles