Air One S.p.A. was an Italian low-cost airline which operated as Air One "Smart Carrier". It operated as Alitalia's low-cost subsidiary with operating bases located in Catania, Palermo, Pisa, Venice and Verona; while Tirana was a focus city. "Air One" is a portmanteau of the English meaning Air One and the Italian word 'airone', pronounced IPA [ai'rone], meaning heron, which was also the airline's callsign.