The calculated distance (air line) between Romont and Zürich (Kreis 6) is approximately 90 miles respectively 145 kilometers.
By car or train, the actual journey to Zürich (Kreis 6) is certainly longer, as only the direct route (as the crow flies) between Romont and Zürich (Kreis 6) has been calculated here.
Air line (approximately)
145 kilometers
78 nautical miles