The calculated distance (air line) between Thalwil / Dorfkern and Wetzikon is approximately 11 miles respectively 18 kilometers.
By car or train, the actual journey to Wetzikon is certainly longer, as only the direct route (as the crow flies) between Thalwil / Dorfkern and Wetzikon has been calculated here.
Air line (approximately)
18 kilometers
10 nautical miles