Starting March 31, Air Italy and Bulgaria Air will codeshare on Bulgaria Air's flights from Milan to each Sofia, Varna and Burgas and Air Italy's flights between Milan and each Rome, Naples, Sardinia's Olbia and Cagliari, Sicily's Palermo and Catania and Calabria's Lamezia Terme. The carriers also have an interline agreement so Bulgaria Air passengers can connect from Milan to Air Italy's international destinations on a single ticket.