Oristano-Fenosu Airport (IATA: FNU, ICAO: LIER) is a small regional airport in central western Sardinia, Italy.

It is in the farming village of Fenosu, approximately 3 kilometres (1.9 mi) east of the town of Oristano, and is lapped by highway 131, the island's most important road artery. It is only available to general aviation, and has no commercial flights, though it was the home base of the short-lived FlyOristano. The airport was named for Ernesto Campanelli, an Italian aviator.