The calculated distance (air line) between San Jeronimo De Tunan and Huánuco is approximately 154 miles respectively 248 kilometers.
By car or train, the actual journey to Huánuco is certainly longer, as only the direct route (as the crow flies) between San Jeronimo De Tunan and Huánuco has been calculated here.
Air line (approximately)
248 kilometers
134 nautical miles