The calculated distance (air line) between Kreuzlingen and Zürich (Kreis 10) is approximately 36 miles respectively 57 kilometers.
By car or train, the actual journey to Zürich (Kreis 10) is certainly longer, as only the direct route (as the crow flies) between Kreuzlingen and Zürich (Kreis 10) has been calculated here.
Air line (approximately)
57 kilometers
31 nautical miles