The calculated distance (air line) between Ancona and Porto Sant'Elpidio is approximately 27 miles respectively 43 kilometers.
By car or train, the actual journey to Porto Sant'Elpidio is certainly longer, as only the direct route (as the crow flies) between Ancona and Porto Sant'Elpidio has been calculated here.
Air line (approximately)
43 kilometers
23 nautical miles