The calculated distance (air line) between Ariano Irpino-Martiri and Foggia is approximately 31 miles respectively 50 kilometers.
By car or train, the actual journey to Foggia is certainly longer, as only the direct route (as the crow flies) between Ariano Irpino-Martiri and Foggia has been calculated here.
Air line (approximately)
50 kilometers
27 nautical miles