The Aire is a river in northern France, right tributary of the Aisne. Its source is near the village Saint-Aubin-sur-Aire. Its course crosses the départements of Meuse and Ardennes. It flows through the towns of Pierrefitte-sur-Aire, Clermont-en-Argonne, Varennes-en-Argonne and Grandpré, finally flowing into the Aisne in Termes.