The calculated distance (air line) between Ecublens and Zürich (Kreis 12) is approximately 100 miles respectively 161 kilometers.
By car or train, the actual journey to Zürich (Kreis 12) is certainly longer, as only the direct route (as the crow flies) between Ecublens and Zürich (Kreis 12) has been calculated here.
Air line (approximately)
161 kilometers
87 nautical miles