The calculated distance (air line) between Porrentruy and Zürich (Kreis 3) is approximately 67 miles respectively 108 kilometers.
By car or train, the actual journey to Zürich (Kreis 3) is certainly longer, as only the direct route (as the crow flies) between Porrentruy and Zürich (Kreis 3) has been calculated here.
Air line (approximately)
108 kilometers
58 nautical miles