The calculated distance (air line) between Salaberry-de-Valleyfield and Québec is approximately 177 miles respectively 284 kilometers.
By car or train, the actual journey to Québec is certainly longer, as only the direct route (as the crow flies) between Salaberry-de-Valleyfield and Québec has been calculated here.
Air line (approximately)
284 kilometers
153 nautical miles