The calculated distance (air line) between La Tour-de-Peilz and Sankt Gallen is approximately 136 miles respectively 219 kilometers.
By car or train, the actual journey to Sankt Gallen is certainly longer, as only the direct route (as the crow flies) between La Tour-de-Peilz and Sankt Gallen has been calculated here.
Air line (approximately)
219 kilometers
118 nautical miles