The calculated distance (air line) between Juan L. Lacaze and Fray Bentos is approximately 103 miles respectively 165 kilometers.
By car or train, the actual journey to Fray Bentos is certainly longer, as only the direct route (as the crow flies) between Juan L. Lacaze and Fray Bentos has been calculated here.
Air line (approximately)
165 kilometers
89 nautical miles