The calculated distance (air line) between Sainte-Anne-des-Plaines and Montréal is approximately 21 miles respectively 33 kilometers.
By car or train, the actual journey to Montréal is certainly longer, as only the direct route (as the crow flies) between Sainte-Anne-des-Plaines and Montréal has been calculated here.
Air line (approximately)
33 kilometers
18 nautical miles