The calculated distance (air line) between Vieira de Leiria and Rio de Mouro is approximately 79 miles respectively 127 kilometers.
By car or train, the actual journey to Rio de Mouro is certainly longer, as only the direct route (as the crow flies) between Vieira de Leiria and Rio de Mouro has been calculated here.
Air line (approximately)
127 kilometers
69 nautical miles