From Malpensa / Orio al Serio / Linate Airports: you need to take the shuttle bus just outside the airport, ticket between 5.00 and 10.00 euros. The journey takes between 40 and 50 minutes depending on traffic. Alternatively you can take a taxi at a cost of 90 euros.
From Malpensa Airport you can also take the Malpensa Express Train and get to Milan Central Station or Cadorna Station; in this case you must take the green metro line and get off at Central.
From Metro Central Station: you can take the yellow metro line and get off at Sondrio, following the exit Sondrio-Via Tonale, walk along Via Melchiorre Gioia for 500 meters; turn right at the corner where you find Banca di Siena, and after a few meters you are in Via Privata Antonio Vivaldi 4.