The calculated distance (air line) between Dietlikon / Dietlikon (Dorf) and Bern is approximately 64 miles respectively 103 kilometers.
By car or train, the actual journey to Bern is certainly longer, as only the direct route (as the crow flies) between Dietlikon / Dietlikon (Dorf) and Bern has been calculated here.
Air line (approximately)
103 kilometers
55 nautical miles