The calculated distance (air line) between Thalwil / Dorfkern and Neuchâtel is approximately 80 miles respectively 128 kilometers.
By car or train, the actual journey to Neuchâtel is certainly longer, as only the direct route (as the crow flies) between Thalwil / Dorfkern and Neuchâtel has been calculated here.
Air line (approximately)
128 kilometers
69 nautical miles