The calculated distance (air line) between Zürich (Kreis 12) / Schwamendingen-Mitte and Wil is approximately 22 miles respectively 36 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 12) / Schwamendingen-Mitte and Wil has been calculated here.
Air line (approximately)
36 kilometers
19 nautical miles