The calculated distance (air line) between Thalwil / Dorfkern and Lausanne is approximately 106 miles respectively 170 kilometers.
By car or train, the actual journey to Lausanne is certainly longer, as only the direct route (as the crow flies) between Thalwil / Dorfkern and Lausanne has been calculated here.
Air line (approximately)
170 kilometers
92 nautical miles