The calculated distance (air line) between Zürich (Kreis 11) / Seebach and Basel is approximately 46 miles respectively 75 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 11) / Seebach and Basel has been calculated here.
Air line (approximately)
75 kilometers
40 nautical miles