The calculated distance (air line) between Thônex and Zürich (Kreis 3) is approximately 136 miles respectively 218 kilometers.
By car or train, the actual journey to Zürich (Kreis 3) is certainly longer, as only the direct route (as the crow flies) between Thônex and Zürich (Kreis 3) has been calculated here.
Air line (approximately)
218 kilometers
118 nautical miles