The calculated distance (air line) between Sainte-Thérèse and Gatineau is approximately 91 miles respectively 147 kilometers.
By car or train, the actual journey to Gatineau is certainly longer, as only the direct route (as the crow flies) between Sainte-Thérèse and Gatineau has been calculated here.
Air line (approximately)
147 kilometers
79 nautical miles