The calculated distance (air line) between Zürich (Kreis 6) / Oberstrass and Schaffhausen is approximately 22 miles respectively 35 kilometers.
By car or train, the actual journey to Schaffhausen is certainly longer, as only the direct route (as the crow flies) between Zürich (Kreis 6) / Oberstrass and Schaffhausen has been calculated here.
Air line (approximately)
35 kilometers
19 nautical miles