The calculated distance (air line) between Basel and Zürich (Kreis 7) is approximately 49 miles respectively 78 kilometers.
By car or train, the actual journey to Zürich (Kreis 7) is certainly longer, as only the direct route (as the crow flies) between Basel and Zürich (Kreis 7) has been calculated here.
Air line (approximately)
78 kilometers
42 nautical miles