The calculated distance (air line) between Petit-Bourg and Anse-Bertrand is approximately 20 miles respectively 32 kilometers.
By car or train, the actual journey to Anse-Bertrand is certainly longer, as only the direct route (as the crow flies) between Petit-Bourg and Anse-Bertrand has been calculated here.
Air line (approximately)
32 kilometers
18 nautical miles