The calculated distance (air line) between Thun and Zürich (Kreis 7) is approximately 62 miles respectively 100 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 Thun and Zürich (Kreis 7) has been calculated here.
Air line (approximately)
100 kilometers
54 nautical miles