The calculated distance (air line) between Zürich (Kreis 7) / Witikon and Basel is approximately 50 miles respectively 80 kilometers.
By car or train, the actual journey to Basel is certainly longer, as only the direct route (as the crow flies) between Zürich (Kreis 7) / Witikon and Basel has been calculated here.
Air line (approximately)
80 kilometers
43 nautical miles