The calculated distance (air line) between Porrentruy and Zürich (Kreis 6) is approximately 69 miles respectively 111 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 Porrentruy and Zürich (Kreis 6) has been calculated here.
Air line (approximately)
111 kilometers
60 nautical miles