The calculated distance (air line) between Oberwinterthur (Kreis 2) and Neuchâtel is approximately 94 miles respectively 150 kilometers.
By car or train, the actual journey to Neuchâtel is certainly longer, as only the direct route (as the crow flies) between Oberwinterthur (Kreis 2) and Neuchâtel has been calculated here.
Air line (approximately)
150 kilometers
81 nautical miles