The calculated distance (air line) between Zürich (Kreis 10) / Höngg and Frauenfeld is approximately 22 miles respectively 35 kilometers.
By car or train, the actual journey to Frauenfeld is certainly longer, as only the direct route (as the crow flies) between Zürich (Kreis 10) / Höngg and Frauenfeld has been calculated here.
Air line (approximately)
35 kilometers
19 nautical miles