The calculated distance (air line) between Oberwinterthur (Kreis 2) / Talacker and Vernier is approximately 154 miles respectively 248 kilometers.
By car or train, the actual journey to Vernier is certainly longer, as only the direct route (as the crow flies) between Oberwinterthur (Kreis 2) / Talacker and Vernier has been calculated here.
Air line (approximately)
248 kilometers
134 nautical miles