The calculated distance (air line) between Onex and Zürich (Kreis 11) is approximately 143 miles respectively 230 kilometers.
By car or train, the actual journey to Zürich (Kreis 11) is certainly longer, as only the direct route (as the crow flies) between Onex and Zürich (Kreis 11) has been calculated here.
Air line (approximately)
230 kilometers
124 nautical miles