The calculated distance (air line) between Zürich (Kreis 5) / Gewerbeschule and Wil is approximately 25 miles respectively 40 kilometers.
By car or train, the actual journey to Wil is certainly longer, as only the direct route (as the crow flies) between Zürich (Kreis 5) / Gewerbeschule and Wil has been calculated here.
Air line (approximately)
40 kilometers
21 nautical miles